./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-queue-add-2.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/popl20-queue-add-2.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 8c3fe688d0e9a9929009fc24c8ef56c8fc1bfa15613131b287e178eb7d2f1f1e --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 10:35:52,199 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 10:35:52,312 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-10 10:35:52,317 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 10:35:52,318 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 10:35:52,344 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 10:35:52,345 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 10:35:52,345 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 10:35:52,346 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 10:35:52,347 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 10:35:52,347 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 10:35:52,348 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 10:35:52,348 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 10:35:52,349 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 10:35:52,350 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 10:35:52,351 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 10:35:52,351 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-10 10:35:52,351 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 10:35:52,352 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 10:35:52,352 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 10:35:52,352 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 10:35:52,353 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-10 10:35:52,356 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 10:35:52,357 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-10 10:35:52,357 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 10:35:52,357 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 10:35:52,357 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-10 10:35:52,358 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 10:35:52,358 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 10:35:52,358 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 10:35:52,358 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 10:35:52,359 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 10:35:52,359 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 10:35:52,359 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 10:35:52,359 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 10:35:52,360 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-10 10:35:52,360 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 10:35:52,360 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 10:35:52,360 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 10:35:52,361 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 10:35:52,361 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 10:35:52,361 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 10:35:52,361 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c3fe688d0e9a9929009fc24c8ef56c8fc1bfa15613131b287e178eb7d2f1f1e [2024-11-10 10:35:52,618 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 10:35:52,641 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 10:35:52,645 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 10:35:52,646 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 10:35:52,646 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 10:35:52,647 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2024-11-10 10:35:54,146 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 10:35:54,336 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 10:35:54,336 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2024-11-10 10:35:54,345 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efd24a50d/e8eb1659d8d647acbf11ad48e073f01f/FLAG8a76404f5 [2024-11-10 10:35:54,356 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efd24a50d/e8eb1659d8d647acbf11ad48e073f01f [2024-11-10 10:35:54,359 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 10:35:54,360 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 10:35:54,362 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 10:35:54,362 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 10:35:54,366 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 10:35:54,366 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:35:54" (1/1) ... [2024-11-10 10:35:54,367 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ffcc1f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:35:54, skipping insertion in model container [2024-11-10 10:35:54,367 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:35:54" (1/1) ... [2024-11-10 10:35:54,386 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 10:35:54,605 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c[2722,2735] [2024-11-10 10:35:54,619 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 10:35:54,630 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 10:35:54,651 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c[2722,2735] [2024-11-10 10:35:54,654 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 10:35:54,675 INFO L204 MainTranslator]: Completed translation [2024-11-10 10:35:54,675 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:35:54 WrapperNode [2024-11-10 10:35:54,675 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 10:35:54,676 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 10:35:54,696 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 10:35:54,696 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 10:35:54,708 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:35:54" (1/1) ... [2024-11-10 10:35:54,718 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:35:54" (1/1) ... [2024-11-10 10:35:54,766 INFO L138 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 146 [2024-11-10 10:35:54,767 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 10:35:54,768 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 10:35:54,768 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 10:35:54,768 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 10:35:54,779 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:35:54" (1/1) ... [2024-11-10 10:35:54,780 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:35:54" (1/1) ... [2024-11-10 10:35:54,782 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:35:54" (1/1) ... [2024-11-10 10:35:54,801 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 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 10:35:54,805 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:35:54" (1/1) ... [2024-11-10 10:35:54,805 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:35:54" (1/1) ... [2024-11-10 10:35:54,811 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:35:54" (1/1) ... [2024-11-10 10:35:54,812 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:35:54" (1/1) ... [2024-11-10 10:35:54,813 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:35:54" (1/1) ... [2024-11-10 10:35:54,814 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:35:54" (1/1) ... [2024-11-10 10:35:54,817 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 10:35:54,817 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 10:35:54,818 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 10:35:54,818 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 10:35:54,819 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:35:54" (1/1) ... [2024-11-10 10:35:54,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 10:35:54,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:35:54,859 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 10:35:54,862 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 10:35:54,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 10:35:54,911 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-10 10:35:54,912 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-10 10:35:54,912 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-10 10:35:54,912 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-10 10:35:54,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 10:35:54,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 10:35:54,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 10:35:54,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 10:35:54,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-10 10:35:54,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-10 10:35:54,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-10 10:35:54,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 10:35:54,915 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 10:35:54,915 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 10:35:54,915 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 10:35:54,917 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 10:35:55,014 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 10:35:55,017 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 10:35:55,300 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 10:35:55,300 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 10:35:55,515 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 10:35:55,516 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 10:35:55,516 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:35:55 BoogieIcfgContainer [2024-11-10 10:35:55,517 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 10:35:55,520 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 10:35:55,520 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 10:35:55,523 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 10:35:55,523 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 10:35:54" (1/3) ... [2024-11-10 10:35:55,523 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e17fbe7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:35:55, skipping insertion in model container [2024-11-10 10:35:55,524 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:35:54" (2/3) ... [2024-11-10 10:35:55,524 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e17fbe7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:35:55, skipping insertion in model container [2024-11-10 10:35:55,524 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:35:55" (3/3) ... [2024-11-10 10:35:55,525 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-2.wvr.c [2024-11-10 10:35:55,537 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 10:35:55,538 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-10 10:35:55,538 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 10:35:55,580 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-10 10:35:55,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 37 transitions, 88 flow [2024-11-10 10:35:55,651 INFO L124 PetriNetUnfolderBase]: 7/35 cut-off events. [2024-11-10 10:35:55,652 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-10 10:35:55,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 35 events. 7/35 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 47 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 25. Up to 3 conditions per place. [2024-11-10 10:35:55,656 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 37 transitions, 88 flow [2024-11-10 10:35:55,660 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 34 transitions, 80 flow [2024-11-10 10:35:55,673 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 10:35:55,682 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;@24268a6e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 10:35:55,682 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-10 10:35:55,701 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 10:35:55,704 INFO L124 PetriNetUnfolderBase]: 7/33 cut-off events. [2024-11-10 10:35:55,704 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-10 10:35:55,704 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:35:55,705 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:35:55,706 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:35:55,711 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:35:55,711 INFO L85 PathProgramCache]: Analyzing trace with hash -837055817, now seen corresponding path program 1 times [2024-11-10 10:35:55,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:35:55,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915521739] [2024-11-10 10:35:55,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:35:55,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:35:55,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:35:55,925 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 10:35:55,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:35:55,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915521739] [2024-11-10 10:35:55,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915521739] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:35:55,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:35:55,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 10:35:55,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764669300] [2024-11-10 10:35:55,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:35:55,938 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-10 10:35:55,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:35:55,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-10 10:35:55,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-10 10:35:55,974 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-10 10:35:55,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 34 transitions, 80 flow. Second operand has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 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 10:35:55,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:35:55,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-10 10:35:55,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:35:56,070 INFO L124 PetriNetUnfolderBase]: 69/154 cut-off events. [2024-11-10 10:35:56,070 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-11-10 10:35:56,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 154 events. 69/154 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 546 event pairs, 54 based on Foata normal form. 29/158 useless extension candidates. Maximal degree in co-relation 258. Up to 124 conditions per place. [2024-11-10 10:35:56,076 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 18 selfloop transitions, 0 changer transitions 0/30 dead transitions. [2024-11-10 10:35:56,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 30 transitions, 108 flow [2024-11-10 10:35:56,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-10 10:35:56,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-10 10:35:56,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 50 transitions. [2024-11-10 10:35:56,093 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6756756756756757 [2024-11-10 10:35:56,094 INFO L175 Difference]: Start difference. First operand has 34 places, 34 transitions, 80 flow. Second operand 2 states and 50 transitions. [2024-11-10 10:35:56,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 30 transitions, 108 flow [2024-11-10 10:35:56,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 30 transitions, 100 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-10 10:35:56,099 INFO L231 Difference]: Finished difference. Result has 31 places, 30 transitions, 64 flow [2024-11-10 10:35:56,100 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=64, PETRI_PLACES=31, PETRI_TRANSITIONS=30} [2024-11-10 10:35:56,103 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, -3 predicate places. [2024-11-10 10:35:56,104 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 30 transitions, 64 flow [2024-11-10 10:35:56,104 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.5) internal successors, (45), 2 states have internal predecessors, (45), 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 10:35:56,104 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:35:56,104 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] [2024-11-10 10:35:56,104 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 10:35:56,105 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:35:56,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:35:56,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1905306621, now seen corresponding path program 1 times [2024-11-10 10:35:56,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:35:56,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178784734] [2024-11-10 10:35:56,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:35:56,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:35:56,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:35:56,456 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 10:35:56,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:35:56,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178784734] [2024-11-10 10:35:56,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178784734] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:35:56,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:35:56,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 10:35:56,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541033886] [2024-11-10 10:35:56,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:35:56,458 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 10:35:56,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:35:56,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 10:35:56,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 10:35:56,466 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-11-10 10:35:56,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 30 transitions, 64 flow. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 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 10:35:56,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:35:56,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-11-10 10:35:56,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:35:56,627 INFO L124 PetriNetUnfolderBase]: 76/189 cut-off events. [2024-11-10 10:35:56,627 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 10:35:56,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347 conditions, 189 events. 76/189 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 719 event pairs, 61 based on Foata normal form. 7/171 useless extension candidates. Maximal degree in co-relation 344. Up to 125 conditions per place. [2024-11-10 10:35:56,632 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 18 selfloop transitions, 2 changer transitions 8/39 dead transitions. [2024-11-10 10:35:56,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 39 transitions, 140 flow [2024-11-10 10:35:56,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 10:35:56,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 10:35:56,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-11-10 10:35:56,636 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.518918918918919 [2024-11-10 10:35:56,637 INFO L175 Difference]: Start difference. First operand has 31 places, 30 transitions, 64 flow. Second operand 5 states and 96 transitions. [2024-11-10 10:35:56,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 39 transitions, 140 flow [2024-11-10 10:35:56,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 39 transitions, 140 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 10:35:56,642 INFO L231 Difference]: Finished difference. Result has 38 places, 31 transitions, 84 flow [2024-11-10 10:35:56,643 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=84, PETRI_PLACES=38, PETRI_TRANSITIONS=31} [2024-11-10 10:35:56,643 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 4 predicate places. [2024-11-10 10:35:56,643 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 31 transitions, 84 flow [2024-11-10 10:35:56,644 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 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 10:35:56,644 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:35:56,644 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] [2024-11-10 10:35:56,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 10:35:56,645 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:35:56,646 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:35:56,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1545568841, now seen corresponding path program 1 times [2024-11-10 10:35:56,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:35:56,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282625480] [2024-11-10 10:35:56,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:35:56,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:35:56,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:35:56,899 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 10:35:56,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:35:56,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282625480] [2024-11-10 10:35:56,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282625480] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:35:56,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:35:56,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-10 10:35:56,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949233078] [2024-11-10 10:35:56,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:35:56,902 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-10 10:35:56,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:35:56,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-10 10:35:56,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-10 10:35:56,940 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-11-10 10:35:56,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 84 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 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 10:35:56,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:35:56,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-11-10 10:35:56,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:35:57,129 INFO L124 PetriNetUnfolderBase]: 272/552 cut-off events. [2024-11-10 10:35:57,129 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2024-11-10 10:35:57,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1160 conditions, 552 events. 272/552 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2692 event pairs, 78 based on Foata normal form. 1/538 useless extension candidates. Maximal degree in co-relation 1153. Up to 179 conditions per place. [2024-11-10 10:35:57,139 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 54 selfloop transitions, 11 changer transitions 8/81 dead transitions. [2024-11-10 10:35:57,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 81 transitions, 360 flow [2024-11-10 10:35:57,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-10 10:35:57,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-10 10:35:57,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-11-10 10:35:57,143 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4894894894894895 [2024-11-10 10:35:57,145 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 84 flow. Second operand 9 states and 163 transitions. [2024-11-10 10:35:57,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 81 transitions, 360 flow [2024-11-10 10:35:57,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 81 transitions, 356 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-10 10:35:57,149 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 152 flow [2024-11-10 10:35:57,150 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=152, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-11-10 10:35:57,152 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 13 predicate places. [2024-11-10 10:35:57,152 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 152 flow [2024-11-10 10:35:57,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 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 10:35:57,152 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:35:57,153 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] [2024-11-10 10:35:57,153 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-10 10:35:57,153 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:35:57,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:35:57,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1120166439, now seen corresponding path program 2 times [2024-11-10 10:35:57,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:35:57,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977667465] [2024-11-10 10:35:57,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:35:57,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:35:57,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:35:57,229 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 10:35:57,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:35:57,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977667465] [2024-11-10 10:35:57,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977667465] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:35:57,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:35:57,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 10:35:57,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403179384] [2024-11-10 10:35:57,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:35:57,230 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 10:35:57,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:35:57,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 10:35:57,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 10:35:57,232 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-10 10:35:57,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:35:57,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:35:57,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-10 10:35:57,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:35:57,316 INFO L124 PetriNetUnfolderBase]: 125/322 cut-off events. [2024-11-10 10:35:57,316 INFO L125 PetriNetUnfolderBase]: For 171/178 co-relation queries the response was YES. [2024-11-10 10:35:57,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 770 conditions, 322 events. 125/322 cut-off events. For 171/178 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1377 event pairs, 27 based on Foata normal form. 2/312 useless extension candidates. Maximal degree in co-relation 759. Up to 193 conditions per place. [2024-11-10 10:35:57,320 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 24 selfloop transitions, 3 changer transitions 0/44 dead transitions. [2024-11-10 10:35:57,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 44 transitions, 213 flow [2024-11-10 10:35:57,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 10:35:57,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 10:35:57,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2024-11-10 10:35:57,323 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6036036036036037 [2024-11-10 10:35:57,324 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 152 flow. Second operand 3 states and 67 transitions. [2024-11-10 10:35:57,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 44 transitions, 213 flow [2024-11-10 10:35:57,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 44 transitions, 203 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-10 10:35:57,327 INFO L231 Difference]: Finished difference. Result has 46 places, 40 transitions, 155 flow [2024-11-10 10:35:57,327 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=155, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2024-11-10 10:35:57,328 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 12 predicate places. [2024-11-10 10:35:57,328 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 155 flow [2024-11-10 10:35:57,329 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:35:57,329 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:35:57,329 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:35:57,329 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-10 10:35:57,329 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:35:57,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:35:57,330 INFO L85 PathProgramCache]: Analyzing trace with hash 999770018, now seen corresponding path program 1 times [2024-11-10 10:35:57,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:35:57,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927931227] [2024-11-10 10:35:57,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:35:57,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:35:57,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:35:57,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:35:57,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:35:57,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927931227] [2024-11-10 10:35:57,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927931227] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:35:57,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959807290] [2024-11-10 10:35:57,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:35:57,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:35:57,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:35:57,493 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 10:35:57,495 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 10:35:57,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:35:57,576 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-10 10:35:57,581 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:35:57,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:35:57,705 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:35:57,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:35:57,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959807290] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:35:57,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:35:57,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-10 10:35:57,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771855268] [2024-11-10 10:35:57,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:35:57,846 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-10 10:35:57,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:35:57,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-10 10:35:57,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-11-10 10:35:57,851 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-11-10 10:35:57,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 155 flow. Second operand has 12 states, 12 states have (on average 15.583333333333334) internal successors, (187), 12 states have internal predecessors, (187), 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 10:35:57,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:35:57,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-11-10 10:35:57,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:35:58,068 INFO L124 PetriNetUnfolderBase]: 199/540 cut-off events. [2024-11-10 10:35:58,069 INFO L125 PetriNetUnfolderBase]: For 519/546 co-relation queries the response was YES. [2024-11-10 10:35:58,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1376 conditions, 540 events. 199/540 cut-off events. For 519/546 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2880 event pairs, 104 based on Foata normal form. 24/526 useless extension candidates. Maximal degree in co-relation 1365. Up to 224 conditions per place. [2024-11-10 10:35:58,073 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 39 selfloop transitions, 6 changer transitions 3/64 dead transitions. [2024-11-10 10:35:58,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 64 transitions, 336 flow [2024-11-10 10:35:58,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 10:35:58,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 10:35:58,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-11-10 10:35:58,079 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5212355212355212 [2024-11-10 10:35:58,079 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 155 flow. Second operand 7 states and 135 transitions. [2024-11-10 10:35:58,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 64 transitions, 336 flow [2024-11-10 10:35:58,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 64 transitions, 315 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-11-10 10:35:58,085 INFO L231 Difference]: Finished difference. Result has 54 places, 44 transitions, 191 flow [2024-11-10 10:35:58,085 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=191, PETRI_PLACES=54, PETRI_TRANSITIONS=44} [2024-11-10 10:35:58,086 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 20 predicate places. [2024-11-10 10:35:58,086 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 44 transitions, 191 flow [2024-11-10 10:35:58,099 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 15.583333333333334) internal successors, (187), 12 states have internal predecessors, (187), 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 10:35:58,100 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:35:58,100 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 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 10:35:58,119 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 10:35:58,304 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:35:58,305 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:35:58,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:35:58,306 INFO L85 PathProgramCache]: Analyzing trace with hash -530105412, now seen corresponding path program 1 times [2024-11-10 10:35:58,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:35:58,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790147332] [2024-11-10 10:35:58,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:35:58,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:35:58,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:35:58,516 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:35:58,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:35:58,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790147332] [2024-11-10 10:35:58,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790147332] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:35:58,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683114142] [2024-11-10 10:35:58,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:35:58,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:35:58,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:35:58,519 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 10:35:58,521 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 10:35:58,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:35:58,596 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-10 10:35:58,598 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:35:58,671 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:35:58,671 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 10:35:58,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683114142] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:35:58,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 10:35:58,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2024-11-10 10:35:58,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757908733] [2024-11-10 10:35:58,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:35:58,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 10:35:58,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:35:58,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 10:35:58,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-10 10:35:58,677 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-10 10:35:58,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 44 transitions, 191 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:35:58,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:35:58,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-10 10:35:58,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:35:58,806 INFO L124 PetriNetUnfolderBase]: 206/614 cut-off events. [2024-11-10 10:35:58,806 INFO L125 PetriNetUnfolderBase]: For 441/460 co-relation queries the response was YES. [2024-11-10 10:35:58,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1451 conditions, 614 events. 206/614 cut-off events. For 441/460 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3336 event pairs, 43 based on Foata normal form. 15/612 useless extension candidates. Maximal degree in co-relation 1437. Up to 144 conditions per place. [2024-11-10 10:35:58,812 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 41 selfloop transitions, 7 changer transitions 5/69 dead transitions. [2024-11-10 10:35:58,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 69 transitions, 373 flow [2024-11-10 10:35:58,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 10:35:58,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 10:35:58,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-11-10 10:35:58,814 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6756756756756757 [2024-11-10 10:35:58,814 INFO L175 Difference]: Start difference. First operand has 54 places, 44 transitions, 191 flow. Second operand 4 states and 100 transitions. [2024-11-10 10:35:58,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 69 transitions, 373 flow [2024-11-10 10:35:58,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 69 transitions, 352 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-11-10 10:35:58,820 INFO L231 Difference]: Finished difference. Result has 56 places, 43 transitions, 197 flow [2024-11-10 10:35:58,820 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=197, PETRI_PLACES=56, PETRI_TRANSITIONS=43} [2024-11-10 10:35:58,821 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 22 predicate places. [2024-11-10 10:35:58,822 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 43 transitions, 197 flow [2024-11-10 10:35:58,822 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:35:58,822 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:35:58,822 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:35:58,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-10 10:35:59,026 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,SelfDestructingSolverStorable5 [2024-11-10 10:35:59,027 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:35:59,027 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:35:59,027 INFO L85 PathProgramCache]: Analyzing trace with hash -186637108, now seen corresponding path program 2 times [2024-11-10 10:35:59,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:35:59,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900652644] [2024-11-10 10:35:59,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:35:59,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:35:59,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:35:59,628 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:35:59,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:35:59,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900652644] [2024-11-10 10:35:59,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900652644] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:35:59,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534146772] [2024-11-10 10:35:59,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 10:35:59,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:35:59,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:35:59,632 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 10:35:59,633 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 10:35:59,719 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 10:35:59,719 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:35:59,721 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-10 10:35:59,726 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:35:59,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2024-11-10 10:35:59,824 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 10:35:59,947 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 12 treesize of output 3 [2024-11-10 10:35:59,981 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:35:59,982 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:36:00,652 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 55 treesize of output 51 [2024-11-10 10:36:00,676 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-10 10:36:00,676 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 187 treesize of output 172 [2024-11-10 10:36:00,797 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:36:00,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534146772] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:36:00,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:36:00,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 9] total 23 [2024-11-10 10:36:00,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873327630] [2024-11-10 10:36:00,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:36:00,798 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-10 10:36:00,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:36:00,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-10 10:36:00,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2024-11-10 10:36:00,855 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-11-10 10:36:00,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 197 flow. Second operand has 24 states, 24 states have (on average 13.291666666666666) internal successors, (319), 24 states have internal predecessors, (319), 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 10:36:00,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:36:00,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-11-10 10:36:00,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:36:02,310 INFO L124 PetriNetUnfolderBase]: 739/1850 cut-off events. [2024-11-10 10:36:02,311 INFO L125 PetriNetUnfolderBase]: For 2207/2207 co-relation queries the response was YES. [2024-11-10 10:36:02,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4813 conditions, 1850 events. 739/1850 cut-off events. For 2207/2207 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 12692 event pairs, 123 based on Foata normal form. 73/1888 useless extension candidates. Maximal degree in co-relation 4798. Up to 395 conditions per place. [2024-11-10 10:36:02,325 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 147 selfloop transitions, 45 changer transitions 12/217 dead transitions. [2024-11-10 10:36:02,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 217 transitions, 1328 flow [2024-11-10 10:36:02,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-10 10:36:02,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-11-10 10:36:02,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 552 transitions. [2024-11-10 10:36:02,329 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46621621621621623 [2024-11-10 10:36:02,329 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 197 flow. Second operand 32 states and 552 transitions. [2024-11-10 10:36:02,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 217 transitions, 1328 flow [2024-11-10 10:36:02,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 217 transitions, 1234 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-11-10 10:36:02,344 INFO L231 Difference]: Finished difference. Result has 92 places, 89 transitions, 633 flow [2024-11-10 10:36:02,344 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=633, PETRI_PLACES=92, PETRI_TRANSITIONS=89} [2024-11-10 10:36:02,345 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 58 predicate places. [2024-11-10 10:36:02,345 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 89 transitions, 633 flow [2024-11-10 10:36:02,345 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 13.291666666666666) internal successors, (319), 24 states have internal predecessors, (319), 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 10:36:02,346 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:36:02,346 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:36:02,364 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 10:36:02,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:36:02,547 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:36:02,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:36:02,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1127734542, now seen corresponding path program 3 times [2024-11-10 10:36:02,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:36:02,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837106413] [2024-11-10 10:36:02,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:36:02,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:36:02,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:36:03,016 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:36:03,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:36:03,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837106413] [2024-11-10 10:36:03,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837106413] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:36:03,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876554120] [2024-11-10 10:36:03,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 10:36:03,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:36:03,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:36:03,019 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 10:36:03,020 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 10:36:03,085 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-10 10:36:03,085 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:36:03,086 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-10 10:36:03,088 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:36:03,161 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 10:36:03,161 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:36:03,200 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-10 10:36:03,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2024-11-10 10:36:03,224 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 10:36:03,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876554120] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:36:03,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:36:03,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 13 [2024-11-10 10:36:03,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528816305] [2024-11-10 10:36:03,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:36:03,225 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-10 10:36:03,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:36:03,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-10 10:36:03,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-11-10 10:36:03,251 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-11-10 10:36:03,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 89 transitions, 633 flow. Second operand has 14 states, 14 states have (on average 14.142857142857142) internal successors, (198), 14 states have internal predecessors, (198), 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 10:36:03,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:36:03,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-11-10 10:36:03,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:36:03,868 INFO L124 PetriNetUnfolderBase]: 759/1934 cut-off events. [2024-11-10 10:36:03,868 INFO L125 PetriNetUnfolderBase]: For 6612/6612 co-relation queries the response was YES. [2024-11-10 10:36:03,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6150 conditions, 1934 events. 759/1934 cut-off events. For 6612/6612 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 13176 event pairs, 73 based on Foata normal form. 54/1941 useless extension candidates. Maximal degree in co-relation 6126. Up to 461 conditions per place. [2024-11-10 10:36:03,888 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 103 selfloop transitions, 35 changer transitions 0/151 dead transitions. [2024-11-10 10:36:03,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 151 transitions, 1357 flow [2024-11-10 10:36:03,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-10 10:36:03,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-10 10:36:03,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 221 transitions. [2024-11-10 10:36:03,890 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4594594594594595 [2024-11-10 10:36:03,890 INFO L175 Difference]: Start difference. First operand has 92 places, 89 transitions, 633 flow. Second operand 13 states and 221 transitions. [2024-11-10 10:36:03,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 151 transitions, 1357 flow [2024-11-10 10:36:03,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 151 transitions, 1141 flow, removed 104 selfloop flow, removed 7 redundant places. [2024-11-10 10:36:03,912 INFO L231 Difference]: Finished difference. Result has 96 places, 94 transitions, 655 flow [2024-11-10 10:36:03,913 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=655, PETRI_PLACES=96, PETRI_TRANSITIONS=94} [2024-11-10 10:36:03,914 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 62 predicate places. [2024-11-10 10:36:03,914 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 94 transitions, 655 flow [2024-11-10 10:36:03,915 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.142857142857142) internal successors, (198), 14 states have internal predecessors, (198), 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 10:36:03,915 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:36:03,915 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:36:03,933 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 10:36:04,116 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:36:04,116 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:36:04,117 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:36:04,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1144902503, now seen corresponding path program 1 times [2024-11-10 10:36:04,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:36:04,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360656003] [2024-11-10 10:36:04,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:36:04,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:36:04,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:36:04,928 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:36:04,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:36:04,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360656003] [2024-11-10 10:36:04,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360656003] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:36:04,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514688668] [2024-11-10 10:36:04,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:36:04,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:36:04,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:36:04,931 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 10:36:04,933 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 10:36:05,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:36:05,011 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-10 10:36:05,013 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:36:05,508 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 11 treesize of output 3 [2024-11-10 10:36:05,711 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:36:05,711 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:36:06,016 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:36:06,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-11-10 10:36:06,438 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:36:06,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514688668] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:36:06,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:36:06,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 14] total 43 [2024-11-10 10:36:06,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651294288] [2024-11-10 10:36:06,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:36:06,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-10 10:36:06,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:36:06,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-10 10:36:06,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1635, Unknown=0, NotChecked=0, Total=1892 [2024-11-10 10:36:06,503 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-11-10 10:36:06,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 94 transitions, 655 flow. Second operand has 44 states, 44 states have (on average 8.840909090909092) internal successors, (389), 44 states have internal predecessors, (389), 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 10:36:06,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:36:06,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-11-10 10:36:06,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:36:11,488 INFO L124 PetriNetUnfolderBase]: 2666/5420 cut-off events. [2024-11-10 10:36:11,488 INFO L125 PetriNetUnfolderBase]: For 13660/13736 co-relation queries the response was YES. [2024-11-10 10:36:11,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16973 conditions, 5420 events. 2666/5420 cut-off events. For 13660/13736 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 39265 event pairs, 209 based on Foata normal form. 40/5456 useless extension candidates. Maximal degree in co-relation 16952. Up to 1567 conditions per place. [2024-11-10 10:36:11,532 INFO L140 encePairwiseOnDemand]: 19/37 looper letters, 235 selfloop transitions, 265 changer transitions 71/576 dead transitions. [2024-11-10 10:36:11,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 576 transitions, 4274 flow [2024-11-10 10:36:11,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2024-11-10 10:36:11,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2024-11-10 10:36:11,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 961 transitions. [2024-11-10 10:36:11,540 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.34174964438122335 [2024-11-10 10:36:11,541 INFO L175 Difference]: Start difference. First operand has 96 places, 94 transitions, 655 flow. Second operand 76 states and 961 transitions. [2024-11-10 10:36:11,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 576 transitions, 4274 flow [2024-11-10 10:36:11,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 576 transitions, 4180 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-11-10 10:36:11,587 INFO L231 Difference]: Finished difference. Result has 188 places, 342 transitions, 3217 flow [2024-11-10 10:36:11,587 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=627, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=3217, PETRI_PLACES=188, PETRI_TRANSITIONS=342} [2024-11-10 10:36:11,588 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 154 predicate places. [2024-11-10 10:36:11,588 INFO L471 AbstractCegarLoop]: Abstraction has has 188 places, 342 transitions, 3217 flow [2024-11-10 10:36:11,589 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 8.840909090909092) internal successors, (389), 44 states have internal predecessors, (389), 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 10:36:11,589 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:36:11,589 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:36:11,607 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 10:36:11,793 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:36:11,794 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:36:11,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:36:11,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1517296511, now seen corresponding path program 2 times [2024-11-10 10:36:11,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:36:11,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516560511] [2024-11-10 10:36:11,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:36:11,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:36:11,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:36:12,707 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:36:12,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:36:12,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516560511] [2024-11-10 10:36:12,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516560511] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:36:12,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554534880] [2024-11-10 10:36:12,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 10:36:12,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:36:12,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:36:12,709 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 10:36:12,710 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 10:36:12,776 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 10:36:12,776 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:36:12,777 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-10 10:36:12,779 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:36:13,352 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:36:13,352 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:36:13,567 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:36:13,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-11-10 10:36:13,911 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:36:13,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554534880] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:36:13,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:36:13,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 14] total 43 [2024-11-10 10:36:13,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660307713] [2024-11-10 10:36:13,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:36:13,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-10 10:36:13,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:36:13,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-10 10:36:13,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1684, Unknown=0, NotChecked=0, Total=1892 [2024-11-10 10:36:13,987 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-11-10 10:36:13,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 342 transitions, 3217 flow. Second operand has 44 states, 44 states have (on average 8.840909090909092) internal successors, (389), 44 states have internal predecessors, (389), 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 10:36:13,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:36:13,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-11-10 10:36:13,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:36:17,385 INFO L124 PetriNetUnfolderBase]: 3111/6338 cut-off events. [2024-11-10 10:36:17,386 INFO L125 PetriNetUnfolderBase]: For 47247/47519 co-relation queries the response was YES. [2024-11-10 10:36:17,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28051 conditions, 6338 events. 3111/6338 cut-off events. For 47247/47519 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 47444 event pairs, 203 based on Foata normal form. 51/6374 useless extension candidates. Maximal degree in co-relation 28005. Up to 2330 conditions per place. [2024-11-10 10:36:17,448 INFO L140 encePairwiseOnDemand]: 21/37 looper letters, 381 selfloop transitions, 284 changer transitions 59/729 dead transitions. [2024-11-10 10:36:17,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 729 transitions, 7971 flow [2024-11-10 10:36:17,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-11-10 10:36:17,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2024-11-10 10:36:17,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 708 transitions. [2024-11-10 10:36:17,452 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.34791154791154794 [2024-11-10 10:36:17,452 INFO L175 Difference]: Start difference. First operand has 188 places, 342 transitions, 3217 flow. Second operand 55 states and 708 transitions. [2024-11-10 10:36:17,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 729 transitions, 7971 flow [2024-11-10 10:36:17,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 729 transitions, 7368 flow, removed 291 selfloop flow, removed 11 redundant places. [2024-11-10 10:36:17,732 INFO L231 Difference]: Finished difference. Result has 244 places, 452 transitions, 5135 flow [2024-11-10 10:36:17,733 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=2918, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=5135, PETRI_PLACES=244, PETRI_TRANSITIONS=452} [2024-11-10 10:36:17,733 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 210 predicate places. [2024-11-10 10:36:17,733 INFO L471 AbstractCegarLoop]: Abstraction has has 244 places, 452 transitions, 5135 flow [2024-11-10 10:36:17,734 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 8.840909090909092) internal successors, (389), 44 states have internal predecessors, (389), 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 10:36:17,734 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:36:17,734 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:36:17,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-10 10:36:17,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:36:17,935 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:36:17,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:36:17,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1705881223, now seen corresponding path program 3 times [2024-11-10 10:36:17,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:36:17,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391786285] [2024-11-10 10:36:17,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:36:17,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:36:17,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:36:18,784 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:36:18,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:36:18,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391786285] [2024-11-10 10:36:18,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391786285] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:36:18,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878669377] [2024-11-10 10:36:18,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 10:36:18,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:36:18,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:36:18,785 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 10:36:18,786 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 10:36:18,850 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-10 10:36:18,850 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:36:18,851 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-10 10:36:18,853 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:36:19,150 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 10:36:19,150 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:36:19,380 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:36:19,381 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 21 [2024-11-10 10:36:19,467 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 10:36:19,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878669377] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:36:19,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:36:19,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 11] total 35 [2024-11-10 10:36:19,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967225829] [2024-11-10 10:36:19,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:36:19,468 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-10 10:36:19,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:36:19,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-10 10:36:19,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1134, Unknown=0, NotChecked=0, Total=1260 [2024-11-10 10:36:19,516 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-11-10 10:36:19,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 452 transitions, 5135 flow. Second operand has 36 states, 36 states have (on average 8.88888888888889) internal successors, (320), 36 states have internal predecessors, (320), 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 10:36:19,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:36:19,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-11-10 10:36:19,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:36:22,123 INFO L124 PetriNetUnfolderBase]: 3311/6724 cut-off events. [2024-11-10 10:36:22,123 INFO L125 PetriNetUnfolderBase]: For 64783/64973 co-relation queries the response was YES. [2024-11-10 10:36:22,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33467 conditions, 6724 events. 3311/6724 cut-off events. For 64783/64973 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 50716 event pairs, 230 based on Foata normal form. 61/6781 useless extension candidates. Maximal degree in co-relation 33401. Up to 2081 conditions per place. [2024-11-10 10:36:22,178 INFO L140 encePairwiseOnDemand]: 20/37 looper letters, 303 selfloop transitions, 320 changer transitions 74/702 dead transitions. [2024-11-10 10:36:22,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 702 transitions, 8740 flow [2024-11-10 10:36:22,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-10 10:36:22,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2024-11-10 10:36:22,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 519 transitions. [2024-11-10 10:36:22,181 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.34212261041529335 [2024-11-10 10:36:22,181 INFO L175 Difference]: Start difference. First operand has 244 places, 452 transitions, 5135 flow. Second operand 41 states and 519 transitions. [2024-11-10 10:36:22,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 702 transitions, 8740 flow [2024-11-10 10:36:22,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 702 transitions, 8496 flow, removed 74 selfloop flow, removed 29 redundant places. [2024-11-10 10:36:22,532 INFO L231 Difference]: Finished difference. Result has 261 places, 513 transitions, 6678 flow [2024-11-10 10:36:22,533 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=4940, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=6678, PETRI_PLACES=261, PETRI_TRANSITIONS=513} [2024-11-10 10:36:22,534 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 227 predicate places. [2024-11-10 10:36:22,534 INFO L471 AbstractCegarLoop]: Abstraction has has 261 places, 513 transitions, 6678 flow [2024-11-10 10:36:22,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 8.88888888888889) internal successors, (320), 36 states have internal predecessors, (320), 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 10:36:22,534 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:36:22,535 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:36:22,547 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 10:36:22,735 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:36:22,736 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:36:22,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:36:22,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1092916327, now seen corresponding path program 4 times [2024-11-10 10:36:22,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:36:22,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330229598] [2024-11-10 10:36:22,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:36:22,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:36:22,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:36:23,519 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:36:23,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:36:23,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330229598] [2024-11-10 10:36:23,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330229598] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:36:23,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562960800] [2024-11-10 10:36:23,520 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-10 10:36:23,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:36:23,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:36:23,521 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 10:36:23,522 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 10:36:23,586 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-10 10:36:23,586 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:36:23,588 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-10 10:36:23,589 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:36:23,846 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 12 treesize of output 3 [2024-11-10 10:36:24,071 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:36:24,071 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:36:24,293 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:36:24,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-11-10 10:36:24,670 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:36:24,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562960800] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:36:24,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:36:24,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 42 [2024-11-10 10:36:24,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288654] [2024-11-10 10:36:24,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:36:24,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-10 10:36:24,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:36:24,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-10 10:36:24,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1597, Unknown=0, NotChecked=0, Total=1806 [2024-11-10 10:36:24,722 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-11-10 10:36:24,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 513 transitions, 6678 flow. Second operand has 43 states, 43 states have (on average 8.837209302325581) internal successors, (380), 43 states have internal predecessors, (380), 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 10:36:24,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:36:24,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-11-10 10:36:24,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:36:27,940 INFO L124 PetriNetUnfolderBase]: 3352/6883 cut-off events. [2024-11-10 10:36:27,941 INFO L125 PetriNetUnfolderBase]: For 83238/83408 co-relation queries the response was YES. [2024-11-10 10:36:27,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37264 conditions, 6883 events. 3352/6883 cut-off events. For 83238/83408 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 52891 event pairs, 302 based on Foata normal form. 73/6950 useless extension candidates. Maximal degree in co-relation 37191. Up to 3403 conditions per place. [2024-11-10 10:36:28,018 INFO L140 encePairwiseOnDemand]: 19/37 looper letters, 314 selfloop transitions, 318 changer transitions 56/693 dead transitions. [2024-11-10 10:36:28,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 693 transitions, 9669 flow [2024-11-10 10:36:28,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-10 10:36:28,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2024-11-10 10:36:28,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 509 transitions. [2024-11-10 10:36:28,025 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32754182754182753 [2024-11-10 10:36:28,025 INFO L175 Difference]: Start difference. First operand has 261 places, 513 transitions, 6678 flow. Second operand 42 states and 509 transitions. [2024-11-10 10:36:28,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 693 transitions, 9669 flow [2024-11-10 10:36:28,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 693 transitions, 9473 flow, removed 78 selfloop flow, removed 22 redundant places. [2024-11-10 10:36:28,435 INFO L231 Difference]: Finished difference. Result has 280 places, 532 transitions, 7936 flow [2024-11-10 10:36:28,436 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=6521, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=289, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=7936, PETRI_PLACES=280, PETRI_TRANSITIONS=532} [2024-11-10 10:36:28,436 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 246 predicate places. [2024-11-10 10:36:28,437 INFO L471 AbstractCegarLoop]: Abstraction has has 280 places, 532 transitions, 7936 flow [2024-11-10 10:36:28,437 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 8.837209302325581) internal successors, (380), 43 states have internal predecessors, (380), 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 10:36:28,437 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:36:28,437 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:36:28,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-10 10:36:28,637 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,SelfDestructingSolverStorable11 [2024-11-10 10:36:28,638 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:36:28,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:36:28,638 INFO L85 PathProgramCache]: Analyzing trace with hash 190145869, now seen corresponding path program 5 times [2024-11-10 10:36:28,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:36:28,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185502762] [2024-11-10 10:36:28,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:36:28,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:36:28,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:36:29,482 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:36:29,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:36:29,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185502762] [2024-11-10 10:36:29,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185502762] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:36:29,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091626054] [2024-11-10 10:36:29,483 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-10 10:36:29,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:36:29,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:36:29,486 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 10:36:29,487 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 10:36:29,564 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-10 10:36:29,565 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:36:29,566 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-10 10:36:29,568 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:36:29,893 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 10:36:29,893 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:36:30,086 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:36:30,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-11-10 10:36:30,202 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 10:36:30,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091626054] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:36:30,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:36:30,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 33 [2024-11-10 10:36:30,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511693658] [2024-11-10 10:36:30,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:36:30,203 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-10 10:36:30,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:36:30,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-10 10:36:30,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2024-11-10 10:36:30,273 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-11-10 10:36:30,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 532 transitions, 7936 flow. Second operand has 34 states, 34 states have (on average 9.0) internal successors, (306), 34 states have internal predecessors, (306), 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 10:36:30,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:36:30,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-11-10 10:36:30,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:36:32,417 INFO L124 PetriNetUnfolderBase]: 3474/7026 cut-off events. [2024-11-10 10:36:32,417 INFO L125 PetriNetUnfolderBase]: For 104922/105094 co-relation queries the response was YES. [2024-11-10 10:36:32,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41890 conditions, 7026 events. 3474/7026 cut-off events. For 104922/105094 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 53335 event pairs, 309 based on Foata normal form. 70/7089 useless extension candidates. Maximal degree in co-relation 41813. Up to 3195 conditions per place. [2024-11-10 10:36:32,477 INFO L140 encePairwiseOnDemand]: 22/37 looper letters, 336 selfloop transitions, 303 changer transitions 45/689 dead transitions. [2024-11-10 10:36:32,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 689 transitions, 11003 flow [2024-11-10 10:36:32,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-10 10:36:32,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-11-10 10:36:32,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 366 transitions. [2024-11-10 10:36:32,479 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32972972972972975 [2024-11-10 10:36:32,479 INFO L175 Difference]: Start difference. First operand has 280 places, 532 transitions, 7936 flow. Second operand 30 states and 366 transitions. [2024-11-10 10:36:32,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 689 transitions, 11003 flow [2024-11-10 10:36:33,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 689 transitions, 10838 flow, removed 64 selfloop flow, removed 21 redundant places. [2024-11-10 10:36:33,088 INFO L231 Difference]: Finished difference. Result has 285 places, 552 transitions, 9285 flow [2024-11-10 10:36:33,088 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=7799, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=9285, PETRI_PLACES=285, PETRI_TRANSITIONS=552} [2024-11-10 10:36:33,089 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 251 predicate places. [2024-11-10 10:36:33,089 INFO L471 AbstractCegarLoop]: Abstraction has has 285 places, 552 transitions, 9285 flow [2024-11-10 10:36:33,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 9.0) internal successors, (306), 34 states have internal predecessors, (306), 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 10:36:33,089 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:36:33,089 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:36:33,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-10 10:36:33,289 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,SelfDestructingSolverStorable12 [2024-11-10 10:36:33,290 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:36:33,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:36:33,290 INFO L85 PathProgramCache]: Analyzing trace with hash -584629215, now seen corresponding path program 6 times [2024-11-10 10:36:33,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:36:33,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072426135] [2024-11-10 10:36:33,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:36:33,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:36:33,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:36:34,341 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:36:34,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:36:34,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072426135] [2024-11-10 10:36:34,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072426135] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:36:34,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608793135] [2024-11-10 10:36:34,342 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-10 10:36:34,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:36:34,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:36:34,343 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 10:36:34,345 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 10:36:34,410 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-10 10:36:34,411 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:36:34,412 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-10 10:36:34,413 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:36:34,797 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-10 10:36:34,797 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:36:34,950 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:36:34,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-11-10 10:36:35,077 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-10 10:36:35,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608793135] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:36:35,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:36:35,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 10] total 34 [2024-11-10 10:36:35,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799533074] [2024-11-10 10:36:35,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:36:35,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-10 10:36:35,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:36:35,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-10 10:36:35,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1071, Unknown=0, NotChecked=0, Total=1190 [2024-11-10 10:36:35,199 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-11-10 10:36:35,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 552 transitions, 9285 flow. Second operand has 35 states, 35 states have (on average 9.028571428571428) internal successors, (316), 35 states have internal predecessors, (316), 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 10:36:35,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:36:35,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-11-10 10:36:35,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:36:37,754 INFO L124 PetriNetUnfolderBase]: 3593/7249 cut-off events. [2024-11-10 10:36:37,754 INFO L125 PetriNetUnfolderBase]: For 136549/136777 co-relation queries the response was YES. [2024-11-10 10:36:37,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46796 conditions, 7249 events. 3593/7249 cut-off events. For 136549/136777 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 54702 event pairs, 261 based on Foata normal form. 79/7323 useless extension candidates. Maximal degree in co-relation 46713. Up to 2593 conditions per place. [2024-11-10 10:36:37,820 INFO L140 encePairwiseOnDemand]: 22/37 looper letters, 371 selfloop transitions, 323 changer transitions 42/741 dead transitions. [2024-11-10 10:36:37,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 741 transitions, 12830 flow [2024-11-10 10:36:37,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-10 10:36:37,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-11-10 10:36:37,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 417 transitions. [2024-11-10 10:36:37,822 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.35219594594594594 [2024-11-10 10:36:37,822 INFO L175 Difference]: Start difference. First operand has 285 places, 552 transitions, 9285 flow. Second operand 32 states and 417 transitions. [2024-11-10 10:36:37,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 741 transitions, 12830 flow [2024-11-10 10:36:38,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 741 transitions, 12690 flow, removed 40 selfloop flow, removed 21 redundant places. [2024-11-10 10:36:38,429 INFO L231 Difference]: Finished difference. Result has 290 places, 575 transitions, 10500 flow [2024-11-10 10:36:38,430 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=9182, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=297, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=10500, PETRI_PLACES=290, PETRI_TRANSITIONS=575} [2024-11-10 10:36:38,430 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 256 predicate places. [2024-11-10 10:36:38,430 INFO L471 AbstractCegarLoop]: Abstraction has has 290 places, 575 transitions, 10500 flow [2024-11-10 10:36:38,430 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 9.028571428571428) internal successors, (316), 35 states have internal predecessors, (316), 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 10:36:38,430 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:36:38,431 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:36:38,443 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 10:36:38,631 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,SelfDestructingSolverStorable13 [2024-11-10 10:36:38,631 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:36:38,632 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:36:38,632 INFO L85 PathProgramCache]: Analyzing trace with hash -308857897, now seen corresponding path program 7 times [2024-11-10 10:36:38,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:36:38,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642365842] [2024-11-10 10:36:38,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:36:38,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:36:38,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:36:39,459 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:36:39,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:36:39,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642365842] [2024-11-10 10:36:39,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642365842] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:36:39,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368342454] [2024-11-10 10:36:39,460 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-10 10:36:39,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:36:39,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:36:39,461 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 10:36:39,463 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 10:36:39,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:36:39,530 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-10 10:36:39,531 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:36:39,893 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:36:39,894 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:36:40,042 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:36:40,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-11-10 10:36:40,131 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-10 10:36:40,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368342454] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:36:40,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:36:40,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12, 10] total 36 [2024-11-10 10:36:40,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551967400] [2024-11-10 10:36:40,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:36:40,132 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-10 10:36:40,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:36:40,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-10 10:36:40,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1209, Unknown=0, NotChecked=0, Total=1332 [2024-11-10 10:36:40,197 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-11-10 10:36:40,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 575 transitions, 10500 flow. Second operand has 37 states, 37 states have (on average 8.945945945945946) internal successors, (331), 37 states have internal predecessors, (331), 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 10:36:40,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:36:40,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-11-10 10:36:40,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:36:42,688 INFO L124 PetriNetUnfolderBase]: 3728/7608 cut-off events. [2024-11-10 10:36:42,689 INFO L125 PetriNetUnfolderBase]: For 178018/178318 co-relation queries the response was YES. [2024-11-10 10:36:42,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50886 conditions, 7608 events. 3728/7608 cut-off events. For 178018/178318 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 58851 event pairs, 295 based on Foata normal form. 93/7696 useless extension candidates. Maximal degree in co-relation 50803. Up to 3111 conditions per place. [2024-11-10 10:36:43,006 INFO L140 encePairwiseOnDemand]: 20/37 looper letters, 339 selfloop transitions, 428 changer transitions 42/814 dead transitions. [2024-11-10 10:36:43,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 814 transitions, 15500 flow [2024-11-10 10:36:43,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-10 10:36:43,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-11-10 10:36:43,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 471 transitions. [2024-11-10 10:36:43,008 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.31824324324324327 [2024-11-10 10:36:43,008 INFO L175 Difference]: Start difference. First operand has 290 places, 575 transitions, 10500 flow. Second operand 40 states and 471 transitions. [2024-11-10 10:36:43,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 814 transitions, 15500 flow [2024-11-10 10:36:43,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 814 transitions, 15265 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-11-10 10:36:43,676 INFO L231 Difference]: Finished difference. Result has 331 places, 666 transitions, 13358 flow [2024-11-10 10:36:43,676 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=10292, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=345, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=13358, PETRI_PLACES=331, PETRI_TRANSITIONS=666} [2024-11-10 10:36:43,677 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 297 predicate places. [2024-11-10 10:36:43,677 INFO L471 AbstractCegarLoop]: Abstraction has has 331 places, 666 transitions, 13358 flow [2024-11-10 10:36:43,677 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 8.945945945945946) internal successors, (331), 37 states have internal predecessors, (331), 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 10:36:43,677 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:36:43,678 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:36:43,691 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 10:36:43,878 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,SelfDestructingSolverStorable14 [2024-11-10 10:36:43,878 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:36:43,879 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:36:43,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1906496297, now seen corresponding path program 8 times [2024-11-10 10:36:43,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:36:43,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176216531] [2024-11-10 10:36:43,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:36:43,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:36:43,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:36:44,953 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:36:44,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:36:44,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176216531] [2024-11-10 10:36:44,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176216531] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:36:44,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035756102] [2024-11-10 10:36:44,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 10:36:44,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:36:44,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:36:44,956 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 10:36:44,958 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 10:36:45,034 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 10:36:45,035 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:36:45,036 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-10 10:36:45,038 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:36:45,433 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:36:45,433 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:36:45,640 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:36:45,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 21 [2024-11-10 10:36:45,737 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-10 10:36:45,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035756102] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:36:45,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:36:45,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 11] total 38 [2024-11-10 10:36:45,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36681493] [2024-11-10 10:36:45,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:36:45,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-10 10:36:45,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:36:45,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-10 10:36:45,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1339, Unknown=0, NotChecked=0, Total=1482 [2024-11-10 10:36:45,786 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-11-10 10:36:45,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 666 transitions, 13358 flow. Second operand has 39 states, 39 states have (on average 8.846153846153847) internal successors, (345), 39 states have internal predecessors, (345), 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 10:36:45,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:36:45,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-11-10 10:36:45,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:36:48,274 INFO L124 PetriNetUnfolderBase]: 3682/7525 cut-off events. [2024-11-10 10:36:48,274 INFO L125 PetriNetUnfolderBase]: For 198748/199020 co-relation queries the response was YES. [2024-11-10 10:36:48,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53736 conditions, 7525 events. 3682/7525 cut-off events. For 198748/199020 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 57678 event pairs, 190 based on Foata normal form. 89/7610 useless extension candidates. Maximal degree in co-relation 53642. Up to 3224 conditions per place. [2024-11-10 10:36:48,343 INFO L140 encePairwiseOnDemand]: 20/37 looper letters, 363 selfloop transitions, 388 changer transitions 49/805 dead transitions. [2024-11-10 10:36:48,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 805 transitions, 16113 flow [2024-11-10 10:36:48,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-10 10:36:48,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-11-10 10:36:48,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 411 transitions. [2024-11-10 10:36:48,345 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3267090620031797 [2024-11-10 10:36:48,345 INFO L175 Difference]: Start difference. First operand has 331 places, 666 transitions, 13358 flow. Second operand 34 states and 411 transitions. [2024-11-10 10:36:48,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 805 transitions, 16113 flow [2024-11-10 10:36:49,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 805 transitions, 15794 flow, removed 105 selfloop flow, removed 25 redundant places. [2024-11-10 10:36:49,208 INFO L231 Difference]: Finished difference. Result has 335 places, 657 transitions, 13730 flow [2024-11-10 10:36:49,209 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=13071, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=388, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=13730, PETRI_PLACES=335, PETRI_TRANSITIONS=657} [2024-11-10 10:36:49,209 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 301 predicate places. [2024-11-10 10:36:49,210 INFO L471 AbstractCegarLoop]: Abstraction has has 335 places, 657 transitions, 13730 flow [2024-11-10 10:36:49,210 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 8.846153846153847) internal successors, (345), 39 states have internal predecessors, (345), 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 10:36:49,210 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:36:49,210 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:36:49,223 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 10:36:49,410 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,SelfDestructingSolverStorable15 [2024-11-10 10:36:49,411 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:36:49,411 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:36:49,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1224098312, now seen corresponding path program 9 times [2024-11-10 10:36:49,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:36:49,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738416411] [2024-11-10 10:36:49,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:36:49,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:36:49,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:36:49,531 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:36:49,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:36:49,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738416411] [2024-11-10 10:36:49,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738416411] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:36:49,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413373734] [2024-11-10 10:36:49,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 10:36:49,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:36:49,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:36:49,535 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 10:36:49,536 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 10:36:49,621 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-10 10:36:49,621 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:36:49,623 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-10 10:36:49,624 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:36:49,791 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:36:49,791 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:36:50,066 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:36:50,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413373734] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:36:50,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:36:50,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2024-11-10 10:36:50,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516978490] [2024-11-10 10:36:50,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:36:50,068 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-10 10:36:50,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:36:50,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-10 10:36:50,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2024-11-10 10:36:50,075 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-11-10 10:36:50,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 657 transitions, 13730 flow. Second operand has 22 states, 22 states have (on average 15.590909090909092) internal successors, (343), 22 states have internal predecessors, (343), 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 10:36:50,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:36:50,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-11-10 10:36:50,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:36:51,254 INFO L124 PetriNetUnfolderBase]: 1487/3710 cut-off events. [2024-11-10 10:36:51,254 INFO L125 PetriNetUnfolderBase]: For 108663/108864 co-relation queries the response was YES. [2024-11-10 10:36:51,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28049 conditions, 3710 events. 1487/3710 cut-off events. For 108663/108864 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 29184 event pairs, 109 based on Foata normal form. 167/3828 useless extension candidates. Maximal degree in co-relation 27960. Up to 1521 conditions per place. [2024-11-10 10:36:51,299 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 225 selfloop transitions, 16 changer transitions 102/475 dead transitions. [2024-11-10 10:36:51,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 475 transitions, 9700 flow [2024-11-10 10:36:51,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-10 10:36:51,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-10 10:36:51,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 226 transitions. [2024-11-10 10:36:51,301 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.509009009009009 [2024-11-10 10:36:51,301 INFO L175 Difference]: Start difference. First operand has 335 places, 657 transitions, 13730 flow. Second operand 12 states and 226 transitions. [2024-11-10 10:36:51,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 475 transitions, 9700 flow [2024-11-10 10:36:51,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 475 transitions, 9039 flow, removed 47 selfloop flow, removed 48 redundant places. [2024-11-10 10:36:51,635 INFO L231 Difference]: Finished difference. Result has 267 places, 345 transitions, 6576 flow [2024-11-10 10:36:51,635 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=8265, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6576, PETRI_PLACES=267, PETRI_TRANSITIONS=345} [2024-11-10 10:36:51,636 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 233 predicate places. [2024-11-10 10:36:51,636 INFO L471 AbstractCegarLoop]: Abstraction has has 267 places, 345 transitions, 6576 flow [2024-11-10 10:36:51,636 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 15.590909090909092) internal successors, (343), 22 states have internal predecessors, (343), 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 10:36:51,636 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:36:51,636 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 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 10:36:51,649 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 10:36:51,837 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-10 10:36:51,837 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:36:51,837 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:36:51,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1945320390, now seen corresponding path program 10 times [2024-11-10 10:36:51,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:36:51,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976151245] [2024-11-10 10:36:51,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:36:51,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:36:51,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:36:51,990 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:36:51,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:36:51,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976151245] [2024-11-10 10:36:51,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976151245] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:36:51,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143677238] [2024-11-10 10:36:51,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-10 10:36:51,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:36:51,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:36:51,994 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 10:36:51,996 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 10:36:52,083 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-10 10:36:52,083 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:36:52,085 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-10 10:36:52,086 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:36:52,158 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 10:36:52,158 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:36:52,328 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-10 10:36:52,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143677238] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:36:52,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:36:52,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 6] total 15 [2024-11-10 10:36:52,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518614775] [2024-11-10 10:36:52,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:36:52,329 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-10 10:36:52,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:36:52,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-10 10:36:52,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2024-11-10 10:36:52,339 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-11-10 10:36:52,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 345 transitions, 6576 flow. Second operand has 16 states, 16 states have (on average 16.625) internal successors, (266), 16 states have internal predecessors, (266), 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 10:36:52,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:36:52,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-11-10 10:36:52,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:36:53,052 INFO L124 PetriNetUnfolderBase]: 1940/4585 cut-off events. [2024-11-10 10:36:53,052 INFO L125 PetriNetUnfolderBase]: For 125935/126171 co-relation queries the response was YES. [2024-11-10 10:36:53,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33032 conditions, 4585 events. 1940/4585 cut-off events. For 125935/126171 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 35765 event pairs, 165 based on Foata normal form. 137/4631 useless extension candidates. Maximal degree in co-relation 32966. Up to 816 conditions per place. [2024-11-10 10:36:53,110 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 201 selfloop transitions, 110 changer transitions 53/476 dead transitions. [2024-11-10 10:36:53,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 476 transitions, 9191 flow [2024-11-10 10:36:53,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-10 10:36:53,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-10 10:36:53,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 273 transitions. [2024-11-10 10:36:53,112 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.527027027027027 [2024-11-10 10:36:53,112 INFO L175 Difference]: Start difference. First operand has 267 places, 345 transitions, 6576 flow. Second operand 14 states and 273 transitions. [2024-11-10 10:36:53,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 476 transitions, 9191 flow [2024-11-10 10:36:53,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 476 transitions, 8646 flow, removed 73 selfloop flow, removed 25 redundant places. [2024-11-10 10:36:53,438 INFO L231 Difference]: Finished difference. Result has 227 places, 352 transitions, 7024 flow [2024-11-10 10:36:53,438 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=6092, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7024, PETRI_PLACES=227, PETRI_TRANSITIONS=352} [2024-11-10 10:36:53,439 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 193 predicate places. [2024-11-10 10:36:53,439 INFO L471 AbstractCegarLoop]: Abstraction has has 227 places, 352 transitions, 7024 flow [2024-11-10 10:36:53,439 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 16.625) internal successors, (266), 16 states have internal predecessors, (266), 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 10:36:53,439 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:36:53,439 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:36:53,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-10 10:36:53,640 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:36:53,640 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:36:53,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:36:53,640 INFO L85 PathProgramCache]: Analyzing trace with hash -98884366, now seen corresponding path program 11 times [2024-11-10 10:36:53,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:36:53,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352705708] [2024-11-10 10:36:53,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:36:53,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:36:53,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:36:54,185 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:36:54,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:36:54,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352705708] [2024-11-10 10:36:54,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352705708] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:36:54,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927732981] [2024-11-10 10:36:54,185 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-10 10:36:54,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:36:54,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:36:54,187 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:36:54,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-10 10:36:54,258 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-10 10:36:54,259 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:36:54,260 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-10 10:36:54,261 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:36:54,630 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-10 10:36:54,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2024-11-10 10:36:54,647 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:36:54,647 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:36:54,770 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-11-10 10:36:54,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2024-11-10 10:36:55,151 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:36:55,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927732981] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:36:55,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:36:55,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 31 [2024-11-10 10:36:55,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591270057] [2024-11-10 10:36:55,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:36:55,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-10 10:36:55,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:36:55,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-10 10:36:55,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2024-11-10 10:36:55,198 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-11-10 10:36:55,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 352 transitions, 7024 flow. Second operand has 32 states, 32 states have (on average 13.21875) internal successors, (423), 32 states have internal predecessors, (423), 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 10:36:55,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:36:55,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-11-10 10:36:55,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:37:01,880 INFO L124 PetriNetUnfolderBase]: 8953/19328 cut-off events. [2024-11-10 10:37:01,880 INFO L125 PetriNetUnfolderBase]: For 589955/592555 co-relation queries the response was YES. [2024-11-10 10:37:01,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133735 conditions, 19328 events. 8953/19328 cut-off events. For 589955/592555 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 170472 event pairs, 1018 based on Foata normal form. 1550/20610 useless extension candidates. Maximal degree in co-relation 133676. Up to 3383 conditions per place. [2024-11-10 10:37:02,079 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 934 selfloop transitions, 762 changer transitions 4/1768 dead transitions. [2024-11-10 10:37:02,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 1768 transitions, 36581 flow [2024-11-10 10:37:02,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2024-11-10 10:37:02,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2024-11-10 10:37:02,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 1332 transitions. [2024-11-10 10:37:02,085 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4931506849315068 [2024-11-10 10:37:02,085 INFO L175 Difference]: Start difference. First operand has 227 places, 352 transitions, 7024 flow. Second operand 73 states and 1332 transitions. [2024-11-10 10:37:02,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 1768 transitions, 36581 flow [2024-11-10 10:37:03,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 1768 transitions, 32757 flow, removed 656 selfloop flow, removed 20 redundant places. [2024-11-10 10:37:03,365 INFO L231 Difference]: Finished difference. Result has 274 places, 1127 transitions, 26343 flow [2024-11-10 10:37:03,365 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=6296, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=26343, PETRI_PLACES=274, PETRI_TRANSITIONS=1127} [2024-11-10 10:37:03,365 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 240 predicate places. [2024-11-10 10:37:03,365 INFO L471 AbstractCegarLoop]: Abstraction has has 274 places, 1127 transitions, 26343 flow [2024-11-10 10:37:03,366 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 13.21875) internal successors, (423), 32 states have internal predecessors, (423), 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 10:37:03,366 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:37:03,366 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:37:03,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-10 10:37:03,567 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:37:03,567 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:37:03,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:37:03,568 INFO L85 PathProgramCache]: Analyzing trace with hash -380623976, now seen corresponding path program 12 times [2024-11-10 10:37:03,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:37:03,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21988977] [2024-11-10 10:37:03,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:37:03,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:37:03,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:37:04,053 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:37:04,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:37:04,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21988977] [2024-11-10 10:37:04,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21988977] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:37:04,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559054733] [2024-11-10 10:37:04,054 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-10 10:37:04,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:37:04,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:37:04,056 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:37:04,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-10 10:37:04,140 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-10 10:37:04,141 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:37:04,142 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-10 10:37:04,143 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:37:04,332 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:37:04,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2024-11-10 10:37:04,393 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-10 10:37:04,393 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:37:04,576 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-10 10:37:04,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2024-11-10 10:37:04,817 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-10 10:37:04,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559054733] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:37:04,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:37:04,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 29 [2024-11-10 10:37:04,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514953333] [2024-11-10 10:37:04,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:37:04,819 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-10 10:37:04,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:37:04,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-10 10:37:04,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2024-11-10 10:37:04,854 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-11-10 10:37:04,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 1127 transitions, 26343 flow. Second operand has 30 states, 30 states have (on average 13.033333333333333) internal successors, (391), 30 states have internal predecessors, (391), 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 10:37:04,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:37:04,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-11-10 10:37:04,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:37:08,422 INFO L124 PetriNetUnfolderBase]: 4234/9748 cut-off events. [2024-11-10 10:37:08,422 INFO L125 PetriNetUnfolderBase]: For 307792/309012 co-relation queries the response was YES. [2024-11-10 10:37:08,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70789 conditions, 9748 events. 4234/9748 cut-off events. For 307792/309012 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 85724 event pairs, 760 based on Foata normal form. 870/10421 useless extension candidates. Maximal degree in co-relation 70711. Up to 2217 conditions per place. [2024-11-10 10:37:08,502 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 397 selfloop transitions, 237 changer transitions 91/793 dead transitions. [2024-11-10 10:37:08,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 793 transitions, 17196 flow [2024-11-10 10:37:08,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-10 10:37:08,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-10 10:37:08,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 472 transitions. [2024-11-10 10:37:08,503 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4555984555984556 [2024-11-10 10:37:08,504 INFO L175 Difference]: Start difference. First operand has 274 places, 1127 transitions, 26343 flow. Second operand 28 states and 472 transitions. [2024-11-10 10:37:08,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 793 transitions, 17196 flow [2024-11-10 10:37:09,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 793 transitions, 16464 flow, removed 339 selfloop flow, removed 27 redundant places. [2024-11-10 10:37:09,502 INFO L231 Difference]: Finished difference. Result has 245 places, 516 transitions, 11264 flow [2024-11-10 10:37:09,502 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=11885, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=11264, PETRI_PLACES=245, PETRI_TRANSITIONS=516} [2024-11-10 10:37:09,503 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 211 predicate places. [2024-11-10 10:37:09,503 INFO L471 AbstractCegarLoop]: Abstraction has has 245 places, 516 transitions, 11264 flow [2024-11-10 10:37:09,503 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 13.033333333333333) internal successors, (391), 30 states have internal predecessors, (391), 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 10:37:09,503 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:37:09,504 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:37:09,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-10 10:37:09,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:37:09,704 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:37:09,704 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:37:09,705 INFO L85 PathProgramCache]: Analyzing trace with hash -2489214, now seen corresponding path program 13 times [2024-11-10 10:37:09,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:37:09,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935925711] [2024-11-10 10:37:09,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:37:09,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:37:09,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:37:10,158 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:37:10,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:37:10,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935925711] [2024-11-10 10:37:10,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935925711] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:37:10,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040261245] [2024-11-10 10:37:10,159 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-10 10:37:10,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:37:10,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:37:10,161 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 10:37:10,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-10 10:37:10,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:37:10,231 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-10 10:37:10,232 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:37:10,470 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 12 treesize of output 3 [2024-11-10 10:37:10,509 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:37:10,509 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:37:10,647 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-11-10 10:37:10,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2024-11-10 10:37:10,929 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:37:10,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040261245] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:37:10,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:37:10,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 31 [2024-11-10 10:37:10,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902521085] [2024-11-10 10:37:10,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:37:10,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-10 10:37:10,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:37:10,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-10 10:37:10,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2024-11-10 10:37:10,969 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-11-10 10:37:10,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 516 transitions, 11264 flow. Second operand has 32 states, 32 states have (on average 13.125) internal successors, (420), 32 states have internal predecessors, (420), 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 10:37:10,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:37:10,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-11-10 10:37:10,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand