./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-counter-fun.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-counter-fun.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 fbe9f324c9eba6beb8c990e3f85f0b00a68548fe05ffdb4e97bc061354d1cdf2 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 10:32:03,501 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 10:32:03,557 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-10 10:32:03,563 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 10:32:03,563 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 10:32:03,587 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 10:32:03,588 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 10:32:03,588 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 10:32:03,588 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 10:32:03,588 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 10:32:03,589 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 10:32:03,589 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 10:32:03,589 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 10:32:03,589 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 10:32:03,590 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 10:32:03,590 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 10:32:03,590 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-10 10:32:03,591 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 10:32:03,591 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 10:32:03,591 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 10:32:03,591 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 10:32:03,592 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-10 10:32:03,592 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 10:32:03,592 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-10 10:32:03,592 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 10:32:03,593 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 10:32:03,593 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-10 10:32:03,593 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 10:32:03,593 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 10:32:03,593 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 10:32:03,593 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 10:32:03,594 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 10:32:03,594 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 10:32:03,594 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 10:32:03,594 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 10:32:03,594 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-10 10:32:03,595 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 10:32:03,595 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 10:32:03,595 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 10:32:03,599 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 10:32:03,600 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 10:32:03,600 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 10:32:03,600 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fbe9f324c9eba6beb8c990e3f85f0b00a68548fe05ffdb4e97bc061354d1cdf2 [2024-11-10 10:32:03,822 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 10:32:03,843 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 10:32:03,845 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 10:32:03,846 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 10:32:03,847 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 10:32:03,848 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2024-11-10 10:32:05,098 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 10:32:05,250 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 10:32:05,251 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2024-11-10 10:32:05,257 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5c170324/2437550c9ab44525abc72820fb50ecf5/FLAG704c5f4e8 [2024-11-10 10:32:05,660 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5c170324/2437550c9ab44525abc72820fb50ecf5 [2024-11-10 10:32:05,662 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 10:32:05,663 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 10:32:05,664 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 10:32:05,665 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 10:32:05,668 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 10:32:05,669 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:32:05" (1/1) ... [2024-11-10 10:32:05,670 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d68f95f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:32:05, skipping insertion in model container [2024-11-10 10:32:05,670 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:32:05" (1/1) ... [2024-11-10 10:32:05,689 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 10:32:05,857 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-counter-fun.wvr.c[2707,2720] [2024-11-10 10:32:05,869 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 10:32:05,877 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 10:32:05,900 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-counter-fun.wvr.c[2707,2720] [2024-11-10 10:32:05,906 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 10:32:05,920 INFO L204 MainTranslator]: Completed translation [2024-11-10 10:32:05,921 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:32:05 WrapperNode [2024-11-10 10:32:05,921 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 10:32:05,923 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 10:32:05,923 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 10:32:05,924 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 10:32:05,929 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:32:05" (1/1) ... [2024-11-10 10:32:05,934 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:32:05" (1/1) ... [2024-11-10 10:32:05,956 INFO L138 Inliner]: procedures = 23, calls = 35, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 187 [2024-11-10 10:32:05,956 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 10:32:05,957 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 10:32:05,958 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 10:32:05,958 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 10:32:05,967 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:32:05" (1/1) ... [2024-11-10 10:32:05,967 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:32:05" (1/1) ... [2024-11-10 10:32:05,972 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:32:05" (1/1) ... [2024-11-10 10:32:05,989 INFO L175 MemorySlicer]: Split 14 memory accesses to 2 slices as follows [2, 12]. 86 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-10 10:32:05,989 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:32:05" (1/1) ... [2024-11-10 10:32:05,989 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:32:05" (1/1) ... [2024-11-10 10:32:05,994 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:32:05" (1/1) ... [2024-11-10 10:32:05,997 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:32:05" (1/1) ... [2024-11-10 10:32:05,999 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:32:05" (1/1) ... [2024-11-10 10:32:06,001 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:32:05" (1/1) ... [2024-11-10 10:32:06,002 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 10:32:06,003 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 10:32:06,003 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 10:32:06,003 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 10:32:06,004 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:32:05" (1/1) ... [2024-11-10 10:32:06,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 10:32:06,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:32:06,038 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 10:32:06,058 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 10:32:06,096 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 10:32:06,096 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-10 10:32:06,096 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-10 10:32:06,096 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-10 10:32:06,096 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-10 10:32:06,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 10:32:06,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 10:32:06,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 10:32:06,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 10:32:06,098 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-10 10:32:06,098 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-10 10:32:06,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-10 10:32:06,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 10:32:06,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 10:32:06,099 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 10:32:06,099 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 10:32:06,100 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 10:32:06,198 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 10:32:06,200 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 10:32:06,439 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 10:32:06,439 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 10:32:06,626 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 10:32:06,627 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 10:32:06,627 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:32:06 BoogieIcfgContainer [2024-11-10 10:32:06,627 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 10:32:06,630 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 10:32:06,630 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 10:32:06,632 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 10:32:06,632 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 10:32:05" (1/3) ... [2024-11-10 10:32:06,633 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ebee18c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:32:06, skipping insertion in model container [2024-11-10 10:32:06,634 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:32:05" (2/3) ... [2024-11-10 10:32:06,634 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ebee18c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:32:06, skipping insertion in model container [2024-11-10 10:32:06,635 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:32:06" (3/3) ... [2024-11-10 10:32:06,636 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-counter-fun.wvr.c [2024-11-10 10:32:06,648 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 10:32:06,649 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-10 10:32:06,649 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 10:32:06,692 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-10 10:32:06,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 38 transitions, 90 flow [2024-11-10 10:32:06,753 INFO L124 PetriNetUnfolderBase]: 8/36 cut-off events. [2024-11-10 10:32:06,753 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-10 10:32:06,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 36 events. 8/36 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 48 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2024-11-10 10:32:06,757 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 38 transitions, 90 flow [2024-11-10 10:32:06,760 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 35 transitions, 82 flow [2024-11-10 10:32:06,770 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 10:32:06,775 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;@326a886e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 10:32:06,775 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-10 10:32:06,787 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 10:32:06,788 INFO L124 PetriNetUnfolderBase]: 8/34 cut-off events. [2024-11-10 10:32:06,788 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-10 10:32:06,788 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:06,789 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 10:32:06,789 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 10:32:06,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:06,794 INFO L85 PathProgramCache]: Analyzing trace with hash -326550447, now seen corresponding path program 1 times [2024-11-10 10:32:06,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:06,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488575904] [2024-11-10 10:32:06,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:06,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:06,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:06,968 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 10:32:06,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:06,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488575904] [2024-11-10 10:32:06,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488575904] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:32:06,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:32:06,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 10:32:06,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672569139] [2024-11-10 10:32:06,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:32:06,997 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-10 10:32:07,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:07,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-10 10:32:07,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-10 10:32:07,057 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 38 [2024-11-10 10:32:07,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 35 transitions, 82 flow. Second operand has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 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 10:32:07,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:07,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 38 [2024-11-10 10:32:07,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:07,136 INFO L124 PetriNetUnfolderBase]: 63/144 cut-off events. [2024-11-10 10:32:07,136 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-10 10:32:07,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 144 events. 63/144 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 503 event pairs, 42 based on Foata normal form. 21/150 useless extension candidates. Maximal degree in co-relation 227. Up to 113 conditions per place. [2024-11-10 10:32:07,141 INFO L140 encePairwiseOnDemand]: 34/38 looper letters, 20 selfloop transitions, 0 changer transitions 0/31 dead transitions. [2024-11-10 10:32:07,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 31 transitions, 114 flow [2024-11-10 10:32:07,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-10 10:32:07,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-10 10:32:07,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 50 transitions. [2024-11-10 10:32:07,152 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6578947368421053 [2024-11-10 10:32:07,153 INFO L175 Difference]: Start difference. First operand has 34 places, 35 transitions, 82 flow. Second operand 2 states and 50 transitions. [2024-11-10 10:32:07,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 31 transitions, 114 flow [2024-11-10 10:32:07,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 31 transitions, 106 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-10 10:32:07,157 INFO L231 Difference]: Finished difference. Result has 31 places, 31 transitions, 66 flow [2024-11-10 10:32:07,158 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=66, PETRI_PLACES=31, PETRI_TRANSITIONS=31} [2024-11-10 10:32:07,161 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, -3 predicate places. [2024-11-10 10:32:07,161 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 31 transitions, 66 flow [2024-11-10 10:32:07,162 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 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 10:32:07,162 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:07,162 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] [2024-11-10 10:32:07,163 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 10:32:07,163 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 10:32:07,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:07,164 INFO L85 PathProgramCache]: Analyzing trace with hash -791003220, now seen corresponding path program 1 times [2024-11-10 10:32:07,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:07,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548396246] [2024-11-10 10:32:07,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:07,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:07,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:07,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:07,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:07,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548396246] [2024-11-10 10:32:07,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548396246] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:32:07,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:32:07,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 10:32:07,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926523228] [2024-11-10 10:32:07,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:32:07,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 10:32:07,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:07,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 10:32:07,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 10:32:07,290 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 38 [2024-11-10 10:32:07,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 31 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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 10:32:07,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:07,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 38 [2024-11-10 10:32:07,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:07,373 INFO L124 PetriNetUnfolderBase]: 94/223 cut-off events. [2024-11-10 10:32:07,374 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-10 10:32:07,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 400 conditions, 223 events. 94/223 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 908 event pairs, 22 based on Foata normal form. 1/201 useless extension candidates. Maximal degree in co-relation 397. Up to 113 conditions per place. [2024-11-10 10:32:07,377 INFO L140 encePairwiseOnDemand]: 34/38 looper letters, 27 selfloop transitions, 3 changer transitions 1/42 dead transitions. [2024-11-10 10:32:07,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 42 transitions, 153 flow [2024-11-10 10:32:07,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 10:32:07,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 10:32:07,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-11-10 10:32:07,379 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6228070175438597 [2024-11-10 10:32:07,379 INFO L175 Difference]: Start difference. First operand has 31 places, 31 transitions, 66 flow. Second operand 3 states and 71 transitions. [2024-11-10 10:32:07,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 42 transitions, 153 flow [2024-11-10 10:32:07,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 42 transitions, 153 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 10:32:07,384 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 85 flow [2024-11-10 10:32:07,384 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2024-11-10 10:32:07,385 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 0 predicate places. [2024-11-10 10:32:07,385 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 85 flow [2024-11-10 10:32:07,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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 10:32:07,386 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:07,386 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 10:32:07,386 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 10:32:07,386 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 10:32:07,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:07,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1644826284, now seen corresponding path program 1 times [2024-11-10 10:32:07,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:07,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108163581] [2024-11-10 10:32:07,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:07,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:07,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:07,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:07,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:07,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108163581] [2024-11-10 10:32:07,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108163581] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:32:07,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:32:07,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-10 10:32:07,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852534083] [2024-11-10 10:32:07,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:32:07,542 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 10:32:07,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:07,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 10:32:07,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-10 10:32:07,552 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 38 [2024-11-10 10:32:07,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 85 flow. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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 10:32:07,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:07,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 38 [2024-11-10 10:32:07,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:07,799 INFO L124 PetriNetUnfolderBase]: 291/556 cut-off events. [2024-11-10 10:32:07,800 INFO L125 PetriNetUnfolderBase]: For 57/61 co-relation queries the response was YES. [2024-11-10 10:32:07,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1176 conditions, 556 events. 291/556 cut-off events. For 57/61 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2718 event pairs, 93 based on Foata normal form. 0/516 useless extension candidates. Maximal degree in co-relation 1171. Up to 257 conditions per place. [2024-11-10 10:32:07,806 INFO L140 encePairwiseOnDemand]: 29/38 looper letters, 52 selfloop transitions, 15 changer transitions 3/78 dead transitions. [2024-11-10 10:32:07,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 78 transitions, 348 flow [2024-11-10 10:32:07,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 10:32:07,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 10:32:07,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-11-10 10:32:07,808 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5526315789473685 [2024-11-10 10:32:07,809 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 85 flow. Second operand 6 states and 126 transitions. [2024-11-10 10:32:07,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 78 transitions, 348 flow [2024-11-10 10:32:07,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 78 transitions, 338 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 10:32:07,811 INFO L231 Difference]: Finished difference. Result has 41 places, 47 transitions, 178 flow [2024-11-10 10:32:07,811 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=178, PETRI_PLACES=41, PETRI_TRANSITIONS=47} [2024-11-10 10:32:07,812 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 7 predicate places. [2024-11-10 10:32:07,813 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 47 transitions, 178 flow [2024-11-10 10:32:07,813 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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 10:32:07,813 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:07,813 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 10:32:07,813 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-10 10:32:07,814 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 10:32:07,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:07,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1174677432, now seen corresponding path program 2 times [2024-11-10 10:32:07,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:07,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625892617] [2024-11-10 10:32:07,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:07,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:07,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:07,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:07,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:07,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625892617] [2024-11-10 10:32:07,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625892617] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:32:07,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294396577] [2024-11-10 10:32:07,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 10:32:07,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:32:07,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:32:07,933 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 10:32:07,934 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 10:32:08,004 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 10:32:08,004 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:32:08,006 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-10 10:32:08,009 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:32:08,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:08,067 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:32:08,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:08,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294396577] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:32:08,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:32:08,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2024-11-10 10:32:08,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038267453] [2024-11-10 10:32:08,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:32:08,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-10 10:32:08,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:08,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-10 10:32:08,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-10 10:32:08,124 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 38 [2024-11-10 10:32:08,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 47 transitions, 178 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 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 10:32:08,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:08,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 38 [2024-11-10 10:32:08,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:08,410 INFO L124 PetriNetUnfolderBase]: 426/783 cut-off events. [2024-11-10 10:32:08,411 INFO L125 PetriNetUnfolderBase]: For 499/499 co-relation queries the response was YES. [2024-11-10 10:32:08,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2187 conditions, 783 events. 426/783 cut-off events. For 499/499 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3874 event pairs, 37 based on Foata normal form. 15/798 useless extension candidates. Maximal degree in co-relation 2179. Up to 139 conditions per place. [2024-11-10 10:32:08,415 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 90 selfloop transitions, 37 changer transitions 2/136 dead transitions. [2024-11-10 10:32:08,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 136 transitions, 771 flow [2024-11-10 10:32:08,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-10 10:32:08,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-10 10:32:08,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 235 transitions. [2024-11-10 10:32:08,418 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4417293233082707 [2024-11-10 10:32:08,418 INFO L175 Difference]: Start difference. First operand has 41 places, 47 transitions, 178 flow. Second operand 14 states and 235 transitions. [2024-11-10 10:32:08,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 136 transitions, 771 flow [2024-11-10 10:32:08,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 136 transitions, 771 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 10:32:08,422 INFO L231 Difference]: Finished difference. Result has 60 places, 75 transitions, 429 flow [2024-11-10 10:32:08,423 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=429, PETRI_PLACES=60, PETRI_TRANSITIONS=75} [2024-11-10 10:32:08,423 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 26 predicate places. [2024-11-10 10:32:08,423 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 75 transitions, 429 flow [2024-11-10 10:32:08,424 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 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 10:32:08,424 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:08,424 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 10:32:08,438 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 10:32:08,628 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:32:08,629 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 10:32:08,629 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:08,630 INFO L85 PathProgramCache]: Analyzing trace with hash 527563630, now seen corresponding path program 3 times [2024-11-10 10:32:08,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:08,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123567627] [2024-11-10 10:32:08,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:08,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:08,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:08,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:08,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:08,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123567627] [2024-11-10 10:32:08,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123567627] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:32:08,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:32:08,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-10 10:32:08,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377757944] [2024-11-10 10:32:08,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:32:08,705 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 10:32:08,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:08,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 10:32:08,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 10:32:08,716 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2024-11-10 10:32:08,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 75 transitions, 429 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 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 10:32:08,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:08,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2024-11-10 10:32:08,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:08,856 INFO L124 PetriNetUnfolderBase]: 416/820 cut-off events. [2024-11-10 10:32:08,856 INFO L125 PetriNetUnfolderBase]: For 1666/1698 co-relation queries the response was YES. [2024-11-10 10:32:08,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2856 conditions, 820 events. 416/820 cut-off events. For 1666/1698 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4338 event pairs, 111 based on Foata normal form. 4/809 useless extension candidates. Maximal degree in co-relation 2841. Up to 325 conditions per place. [2024-11-10 10:32:08,862 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 80 selfloop transitions, 21 changer transitions 10/129 dead transitions. [2024-11-10 10:32:08,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 129 transitions, 980 flow [2024-11-10 10:32:08,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 10:32:08,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 10:32:08,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-11-10 10:32:08,863 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-10 10:32:08,864 INFO L175 Difference]: Start difference. First operand has 60 places, 75 transitions, 429 flow. Second operand 7 states and 133 transitions. [2024-11-10 10:32:08,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 129 transitions, 980 flow [2024-11-10 10:32:08,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 129 transitions, 946 flow, removed 17 selfloop flow, removed 0 redundant places. [2024-11-10 10:32:08,875 INFO L231 Difference]: Finished difference. Result has 71 places, 82 transitions, 545 flow [2024-11-10 10:32:08,876 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=545, PETRI_PLACES=71, PETRI_TRANSITIONS=82} [2024-11-10 10:32:08,876 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 37 predicate places. [2024-11-10 10:32:08,877 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 82 transitions, 545 flow [2024-11-10 10:32:08,877 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 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 10:32:08,877 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:08,878 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 10:32:08,878 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-10 10:32:08,878 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 10:32:08,879 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:08,879 INFO L85 PathProgramCache]: Analyzing trace with hash -668605480, now seen corresponding path program 4 times [2024-11-10 10:32:08,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:08,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640952799] [2024-11-10 10:32:08,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:08,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:08,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:08,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:08,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:08,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640952799] [2024-11-10 10:32:08,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640952799] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:32:08,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:32:08,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 10:32:08,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506740404] [2024-11-10 10:32:08,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:32:08,976 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 10:32:08,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:08,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 10:32:08,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 10:32:08,979 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2024-11-10 10:32:08,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 82 transitions, 545 flow. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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 10:32:08,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:08,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2024-11-10 10:32:08,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:09,093 INFO L124 PetriNetUnfolderBase]: 392/859 cut-off events. [2024-11-10 10:32:09,094 INFO L125 PetriNetUnfolderBase]: For 2611/2661 co-relation queries the response was YES. [2024-11-10 10:32:09,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3281 conditions, 859 events. 392/859 cut-off events. For 2611/2661 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4925 event pairs, 121 based on Foata normal form. 23/842 useless extension candidates. Maximal degree in co-relation 3260. Up to 543 conditions per place. [2024-11-10 10:32:09,101 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 79 selfloop transitions, 6 changer transitions 3/110 dead transitions. [2024-11-10 10:32:09,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 110 transitions, 869 flow [2024-11-10 10:32:09,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 10:32:09,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 10:32:09,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 98 transitions. [2024-11-10 10:32:09,103 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5157894736842106 [2024-11-10 10:32:09,103 INFO L175 Difference]: Start difference. First operand has 71 places, 82 transitions, 545 flow. Second operand 5 states and 98 transitions. [2024-11-10 10:32:09,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 110 transitions, 869 flow [2024-11-10 10:32:09,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 110 transitions, 832 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-11-10 10:32:09,112 INFO L231 Difference]: Finished difference. Result has 74 places, 87 transitions, 559 flow [2024-11-10 10:32:09,112 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=559, PETRI_PLACES=74, PETRI_TRANSITIONS=87} [2024-11-10 10:32:09,114 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 40 predicate places. [2024-11-10 10:32:09,114 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 87 transitions, 559 flow [2024-11-10 10:32:09,114 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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 10:32:09,115 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:09,115 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 10:32:09,115 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-10 10:32:09,115 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 10:32:09,116 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:09,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1539121956, now seen corresponding path program 1 times [2024-11-10 10:32:09,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:09,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489316020] [2024-11-10 10:32:09,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:09,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:09,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:09,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:09,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:09,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489316020] [2024-11-10 10:32:09,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489316020] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:32:09,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:32:09,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-10 10:32:09,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496390698] [2024-11-10 10:32:09,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:32:09,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 10:32:09,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:09,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 10:32:09,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 10:32:09,180 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2024-11-10 10:32:09,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 87 transitions, 559 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 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 10:32:09,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:09,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2024-11-10 10:32:09,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:09,354 INFO L124 PetriNetUnfolderBase]: 527/1037 cut-off events. [2024-11-10 10:32:09,355 INFO L125 PetriNetUnfolderBase]: For 2556/2597 co-relation queries the response was YES. [2024-11-10 10:32:09,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3888 conditions, 1037 events. 527/1037 cut-off events. For 2556/2597 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5735 event pairs, 135 based on Foata normal form. 37/1051 useless extension candidates. Maximal degree in co-relation 3865. Up to 413 conditions per place. [2024-11-10 10:32:09,362 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 85 selfloop transitions, 15 changer transitions 15/129 dead transitions. [2024-11-10 10:32:09,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 129 transitions, 1016 flow [2024-11-10 10:32:09,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 10:32:09,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 10:32:09,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-11-10 10:32:09,364 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.518796992481203 [2024-11-10 10:32:09,364 INFO L175 Difference]: Start difference. First operand has 74 places, 87 transitions, 559 flow. Second operand 7 states and 138 transitions. [2024-11-10 10:32:09,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 129 transitions, 1016 flow [2024-11-10 10:32:09,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 129 transitions, 1010 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 10:32:09,371 INFO L231 Difference]: Finished difference. Result has 82 places, 86 transitions, 592 flow [2024-11-10 10:32:09,371 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=556, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=592, PETRI_PLACES=82, PETRI_TRANSITIONS=86} [2024-11-10 10:32:09,371 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 48 predicate places. [2024-11-10 10:32:09,372 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 86 transitions, 592 flow [2024-11-10 10:32:09,372 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 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 10:32:09,372 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:09,372 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 10:32:09,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-10 10:32:09,373 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 10:32:09,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:09,373 INFO L85 PathProgramCache]: Analyzing trace with hash -289282816, now seen corresponding path program 2 times [2024-11-10 10:32:09,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:09,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889354481] [2024-11-10 10:32:09,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:09,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:09,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:09,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:09,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:09,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889354481] [2024-11-10 10:32:09,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889354481] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:32:09,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090610395] [2024-11-10 10:32:09,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 10:32:09,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:32:09,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:32:09,440 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 10:32:09,441 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 10:32:09,507 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 10:32:09,508 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:32:09,509 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-10 10:32:09,509 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:32:09,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:09,565 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:32:09,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:09,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090610395] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:32:09,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:32:09,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-11-10 10:32:09,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399293851] [2024-11-10 10:32:09,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:32:09,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-10 10:32:09,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:09,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-10 10:32:09,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-11-10 10:32:09,615 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 38 [2024-11-10 10:32:09,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 86 transitions, 592 flow. Second operand has 11 states, 11 states have (on average 12.090909090909092) internal successors, (133), 11 states have internal predecessors, (133), 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 10:32:09,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:09,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 38 [2024-11-10 10:32:09,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:09,985 INFO L124 PetriNetUnfolderBase]: 844/1566 cut-off events. [2024-11-10 10:32:09,985 INFO L125 PetriNetUnfolderBase]: For 5178/5178 co-relation queries the response was YES. [2024-11-10 10:32:09,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6266 conditions, 1566 events. 844/1566 cut-off events. For 5178/5178 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8824 event pairs, 79 based on Foata normal form. 32/1592 useless extension candidates. Maximal degree in co-relation 6240. Up to 286 conditions per place. [2024-11-10 10:32:09,999 INFO L140 encePairwiseOnDemand]: 28/38 looper letters, 134 selfloop transitions, 90 changer transitions 2/234 dead transitions. [2024-11-10 10:32:09,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 234 transitions, 2079 flow [2024-11-10 10:32:09,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-10 10:32:09,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-10 10:32:10,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 293 transitions. [2024-11-10 10:32:10,001 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4535603715170279 [2024-11-10 10:32:10,001 INFO L175 Difference]: Start difference. First operand has 82 places, 86 transitions, 592 flow. Second operand 17 states and 293 transitions. [2024-11-10 10:32:10,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 234 transitions, 2079 flow [2024-11-10 10:32:10,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 234 transitions, 1996 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-11-10 10:32:10,013 INFO L231 Difference]: Finished difference. Result has 102 places, 152 transitions, 1462 flow [2024-11-10 10:32:10,013 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=564, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1462, PETRI_PLACES=102, PETRI_TRANSITIONS=152} [2024-11-10 10:32:10,014 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 68 predicate places. [2024-11-10 10:32:10,014 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 152 transitions, 1462 flow [2024-11-10 10:32:10,014 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.090909090909092) internal successors, (133), 11 states have internal predecessors, (133), 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 10:32:10,014 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:10,014 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 10:32:10,027 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-10 10:32:10,218 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-10 10:32:10,219 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 10:32:10,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:10,219 INFO L85 PathProgramCache]: Analyzing trace with hash -283510546, now seen corresponding path program 3 times [2024-11-10 10:32:10,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:10,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857361746] [2024-11-10 10:32:10,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:10,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:10,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:10,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:10,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:10,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857361746] [2024-11-10 10:32:10,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857361746] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:32:10,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859924159] [2024-11-10 10:32:10,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 10:32:10,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:32:10,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:32:10,297 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 10:32:10,298 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 10:32:10,360 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-10 10:32:10,360 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:32:10,361 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-10 10:32:10,362 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:32:10,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:10,405 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:32:10,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:10,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859924159] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:32:10,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:32:10,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2024-11-10 10:32:10,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76832459] [2024-11-10 10:32:10,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:32:10,428 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-10 10:32:10,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:10,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-10 10:32:10,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-10 10:32:10,447 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 38 [2024-11-10 10:32:10,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 152 transitions, 1462 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 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 10:32:10,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:10,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 38 [2024-11-10 10:32:10,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:10,812 INFO L124 PetriNetUnfolderBase]: 830/1547 cut-off events. [2024-11-10 10:32:10,813 INFO L125 PetriNetUnfolderBase]: For 7726/7726 co-relation queries the response was YES. [2024-11-10 10:32:10,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6982 conditions, 1547 events. 830/1547 cut-off events. For 7726/7726 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 8802 event pairs, 81 based on Foata normal form. 16/1557 useless extension candidates. Maximal degree in co-relation 6948. Up to 274 conditions per place. [2024-11-10 10:32:10,822 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 121 selfloop transitions, 101 changer transitions 2/232 dead transitions. [2024-11-10 10:32:10,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 232 transitions, 2365 flow [2024-11-10 10:32:10,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-10 10:32:10,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-10 10:32:10,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 229 transitions. [2024-11-10 10:32:10,824 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43045112781954886 [2024-11-10 10:32:10,824 INFO L175 Difference]: Start difference. First operand has 102 places, 152 transitions, 1462 flow. Second operand 14 states and 229 transitions. [2024-11-10 10:32:10,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 232 transitions, 2365 flow [2024-11-10 10:32:10,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 232 transitions, 2171 flow, removed 89 selfloop flow, removed 2 redundant places. [2024-11-10 10:32:10,847 INFO L231 Difference]: Finished difference. Result has 119 places, 171 transitions, 1718 flow [2024-11-10 10:32:10,847 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1216, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1718, PETRI_PLACES=119, PETRI_TRANSITIONS=171} [2024-11-10 10:32:10,848 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 85 predicate places. [2024-11-10 10:32:10,849 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 171 transitions, 1718 flow [2024-11-10 10:32:10,849 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 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 10:32:10,849 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:10,849 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 10:32:10,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-10 10:32:11,049 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:32:11,050 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 10:32:11,050 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:11,050 INFO L85 PathProgramCache]: Analyzing trace with hash 936159708, now seen corresponding path program 4 times [2024-11-10 10:32:11,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:11,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375123922] [2024-11-10 10:32:11,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:11,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:11,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:11,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:11,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:11,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375123922] [2024-11-10 10:32:11,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375123922] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:32:11,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:32:11,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-10 10:32:11,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379731279] [2024-11-10 10:32:11,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:32:11,110 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 10:32:11,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:11,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 10:32:11,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 10:32:11,120 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 38 [2024-11-10 10:32:11,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 171 transitions, 1718 flow. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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 10:32:11,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:11,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 38 [2024-11-10 10:32:11,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:11,352 INFO L124 PetriNetUnfolderBase]: 791/1525 cut-off events. [2024-11-10 10:32:11,352 INFO L125 PetriNetUnfolderBase]: For 8414/8430 co-relation queries the response was YES. [2024-11-10 10:32:11,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7239 conditions, 1525 events. 791/1525 cut-off events. For 8414/8430 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 9064 event pairs, 202 based on Foata normal form. 12/1517 useless extension candidates. Maximal degree in co-relation 7200. Up to 685 conditions per place. [2024-11-10 10:32:11,363 INFO L140 encePairwiseOnDemand]: 29/38 looper letters, 120 selfloop transitions, 54 changer transitions 3/208 dead transitions. [2024-11-10 10:32:11,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 208 transitions, 2319 flow [2024-11-10 10:32:11,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 10:32:11,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 10:32:11,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-11-10 10:32:11,365 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.543859649122807 [2024-11-10 10:32:11,365 INFO L175 Difference]: Start difference. First operand has 119 places, 171 transitions, 1718 flow. Second operand 6 states and 124 transitions. [2024-11-10 10:32:11,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 208 transitions, 2319 flow [2024-11-10 10:32:11,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 208 transitions, 2256 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-11-10 10:32:11,387 INFO L231 Difference]: Finished difference. Result has 123 places, 173 transitions, 1811 flow [2024-11-10 10:32:11,387 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1658, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1811, PETRI_PLACES=123, PETRI_TRANSITIONS=173} [2024-11-10 10:32:11,388 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 89 predicate places. [2024-11-10 10:32:11,388 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 173 transitions, 1811 flow [2024-11-10 10:32:11,388 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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 10:32:11,388 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:11,388 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 10:32:11,389 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-10 10:32:11,389 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 10:32:11,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:11,389 INFO L85 PathProgramCache]: Analyzing trace with hash 34739396, now seen corresponding path program 5 times [2024-11-10 10:32:11,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:11,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993039631] [2024-11-10 10:32:11,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:11,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:11,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:11,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:11,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:11,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993039631] [2024-11-10 10:32:11,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993039631] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:32:11,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980847975] [2024-11-10 10:32:11,443 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-10 10:32:11,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:32:11,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:32:11,445 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 10:32:11,446 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 10:32:11,507 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 10:32:11,507 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:32:11,508 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-10 10:32:11,509 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:32:11,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:11,534 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 10:32:11,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980847975] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:32:11,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 10:32:11,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2024-11-10 10:32:11,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302891642] [2024-11-10 10:32:11,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:32:11,535 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 10:32:11,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:11,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 10:32:11,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-10 10:32:11,539 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2024-11-10 10:32:11,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 173 transitions, 1811 flow. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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 10:32:11,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:11,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2024-11-10 10:32:11,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:11,712 INFO L124 PetriNetUnfolderBase]: 609/1483 cut-off events. [2024-11-10 10:32:11,713 INFO L125 PetriNetUnfolderBase]: For 9614/9672 co-relation queries the response was YES. [2024-11-10 10:32:11,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7243 conditions, 1483 events. 609/1483 cut-off events. For 9614/9672 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10430 event pairs, 261 based on Foata normal form. 60/1521 useless extension candidates. Maximal degree in co-relation 7204. Up to 857 conditions per place. [2024-11-10 10:32:11,723 INFO L140 encePairwiseOnDemand]: 32/38 looper letters, 116 selfloop transitions, 3 changer transitions 23/196 dead transitions. [2024-11-10 10:32:11,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 196 transitions, 2326 flow [2024-11-10 10:32:11,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 10:32:11,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 10:32:11,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-11-10 10:32:11,724 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4842105263157895 [2024-11-10 10:32:11,724 INFO L175 Difference]: Start difference. First operand has 123 places, 173 transitions, 1811 flow. Second operand 5 states and 92 transitions. [2024-11-10 10:32:11,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 196 transitions, 2326 flow [2024-11-10 10:32:11,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 196 transitions, 2202 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-10 10:32:11,754 INFO L231 Difference]: Finished difference. Result has 126 places, 173 transitions, 1725 flow [2024-11-10 10:32:11,754 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1706, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1725, PETRI_PLACES=126, PETRI_TRANSITIONS=173} [2024-11-10 10:32:11,754 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 92 predicate places. [2024-11-10 10:32:11,755 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 173 transitions, 1725 flow [2024-11-10 10:32:11,755 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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 10:32:11,755 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:11,755 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] [2024-11-10 10:32:11,770 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 10:32:11,958 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:32:11,959 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 10:32:11,959 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:11,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1322009816, now seen corresponding path program 1 times [2024-11-10 10:32:11,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:11,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702988784] [2024-11-10 10:32:11,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:11,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:11,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:12,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:32:12,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:12,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702988784] [2024-11-10 10:32:12,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702988784] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:32:12,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650121783] [2024-11-10 10:32:12,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:12,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:32:12,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:32:12,043 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 10:32:12,044 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 10:32:12,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:12,111 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-10 10:32:12,112 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:32:12,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:32:12,157 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:32:12,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:32:12,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650121783] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:32:12,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:32:12,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-11-10 10:32:12,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791809753] [2024-11-10 10:32:12,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:32:12,199 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-10 10:32:12,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:12,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-10 10:32:12,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-11-10 10:32:12,211 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 38 [2024-11-10 10:32:12,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 173 transitions, 1725 flow. Second operand has 11 states, 11 states have (on average 12.454545454545455) internal successors, (137), 11 states have internal predecessors, (137), 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 10:32:12,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:12,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 38 [2024-11-10 10:32:12,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:12,502 INFO L124 PetriNetUnfolderBase]: 781/1476 cut-off events. [2024-11-10 10:32:12,502 INFO L125 PetriNetUnfolderBase]: For 7327/7327 co-relation queries the response was YES. [2024-11-10 10:32:12,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6780 conditions, 1476 events. 781/1476 cut-off events. For 7327/7327 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 8378 event pairs, 154 based on Foata normal form. 22/1496 useless extension candidates. Maximal degree in co-relation 6738. Up to 532 conditions per place. [2024-11-10 10:32:12,514 INFO L140 encePairwiseOnDemand]: 28/38 looper letters, 120 selfloop transitions, 84 changer transitions 3/215 dead transitions. [2024-11-10 10:32:12,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 215 transitions, 2333 flow [2024-11-10 10:32:12,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-10 10:32:12,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-10 10:32:12,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-11-10 10:32:12,515 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48830409356725146 [2024-11-10 10:32:12,515 INFO L175 Difference]: Start difference. First operand has 126 places, 173 transitions, 1725 flow. Second operand 9 states and 167 transitions. [2024-11-10 10:32:12,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 215 transitions, 2333 flow [2024-11-10 10:32:12,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 215 transitions, 2264 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-11-10 10:32:12,537 INFO L231 Difference]: Finished difference. Result has 128 places, 172 transitions, 1872 flow [2024-11-10 10:32:12,537 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1520, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1872, PETRI_PLACES=128, PETRI_TRANSITIONS=172} [2024-11-10 10:32:12,538 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 94 predicate places. [2024-11-10 10:32:12,538 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 172 transitions, 1872 flow [2024-11-10 10:32:12,538 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.454545454545455) internal successors, (137), 11 states have internal predecessors, (137), 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 10:32:12,538 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:12,538 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] [2024-11-10 10:32:12,551 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 10:32:12,742 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-10 10:32:12,743 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 10:32:12,743 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:12,743 INFO L85 PathProgramCache]: Analyzing trace with hash -198797556, now seen corresponding path program 2 times [2024-11-10 10:32:12,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:12,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220324576] [2024-11-10 10:32:12,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:12,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:12,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:12,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:32:12,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:12,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220324576] [2024-11-10 10:32:12,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220324576] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:32:12,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:32:12,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-10 10:32:12,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000039470] [2024-11-10 10:32:12,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:32:12,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 10:32:12,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:12,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 10:32:12,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-10 10:32:12,831 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 38 [2024-11-10 10:32:12,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 172 transitions, 1872 flow. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 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 10:32:12,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:12,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 38 [2024-11-10 10:32:12,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:13,013 INFO L124 PetriNetUnfolderBase]: 648/1274 cut-off events. [2024-11-10 10:32:13,014 INFO L125 PetriNetUnfolderBase]: For 7995/8023 co-relation queries the response was YES. [2024-11-10 10:32:13,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6236 conditions, 1274 events. 648/1274 cut-off events. For 7995/8023 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 7216 event pairs, 189 based on Foata normal form. 20/1290 useless extension candidates. Maximal degree in co-relation 6195. Up to 710 conditions per place. [2024-11-10 10:32:13,027 INFO L140 encePairwiseOnDemand]: 29/38 looper letters, 126 selfloop transitions, 34 changer transitions 6/197 dead transitions. [2024-11-10 10:32:13,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 197 transitions, 2363 flow [2024-11-10 10:32:13,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 10:32:13,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 10:32:13,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-11-10 10:32:13,029 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5219298245614035 [2024-11-10 10:32:13,029 INFO L175 Difference]: Start difference. First operand has 128 places, 172 transitions, 1872 flow. Second operand 6 states and 119 transitions. [2024-11-10 10:32:13,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 197 transitions, 2363 flow [2024-11-10 10:32:13,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 197 transitions, 2262 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-11-10 10:32:13,054 INFO L231 Difference]: Finished difference. Result has 129 places, 168 transitions, 1797 flow [2024-11-10 10:32:13,054 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1715, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1797, PETRI_PLACES=129, PETRI_TRANSITIONS=168} [2024-11-10 10:32:13,055 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 95 predicate places. [2024-11-10 10:32:13,055 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 168 transitions, 1797 flow [2024-11-10 10:32:13,055 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 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 10:32:13,055 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:13,055 INFO L204 CegarLoopForPetriNet]: trace histogram [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, 1, 1] [2024-11-10 10:32:13,055 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-10 10:32:13,055 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 10:32:13,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:13,055 INFO L85 PathProgramCache]: Analyzing trace with hash 552024453, now seen corresponding path program 1 times [2024-11-10 10:32:13,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:13,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016053029] [2024-11-10 10:32:13,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:13,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:13,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:13,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 10:32:13,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:13,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016053029] [2024-11-10 10:32:13,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016053029] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:32:13,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:32:13,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-10 10:32:13,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325860195] [2024-11-10 10:32:13,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:32:13,119 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 10:32:13,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:13,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 10:32:13,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-10 10:32:13,125 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 38 [2024-11-10 10:32:13,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 168 transitions, 1797 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 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 10:32:13,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:13,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 38 [2024-11-10 10:32:13,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:13,347 INFO L124 PetriNetUnfolderBase]: 763/1422 cut-off events. [2024-11-10 10:32:13,347 INFO L125 PetriNetUnfolderBase]: For 7829/7857 co-relation queries the response was YES. [2024-11-10 10:32:13,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6605 conditions, 1422 events. 763/1422 cut-off events. For 7829/7857 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 7853 event pairs, 171 based on Foata normal form. 27/1447 useless extension candidates. Maximal degree in co-relation 6565. Up to 590 conditions per place. [2024-11-10 10:32:13,357 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 148 selfloop transitions, 50 changer transitions 0/206 dead transitions. [2024-11-10 10:32:13,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 206 transitions, 2456 flow [2024-11-10 10:32:13,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 10:32:13,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 10:32:13,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-11-10 10:32:13,359 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4956140350877193 [2024-11-10 10:32:13,359 INFO L175 Difference]: Start difference. First operand has 129 places, 168 transitions, 1797 flow. Second operand 6 states and 113 transitions. [2024-11-10 10:32:13,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 206 transitions, 2456 flow [2024-11-10 10:32:13,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 206 transitions, 2261 flow, removed 9 selfloop flow, removed 12 redundant places. [2024-11-10 10:32:13,382 INFO L231 Difference]: Finished difference. Result has 121 places, 174 transitions, 1806 flow [2024-11-10 10:32:13,382 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1614, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1806, PETRI_PLACES=121, PETRI_TRANSITIONS=174} [2024-11-10 10:32:13,383 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 87 predicate places. [2024-11-10 10:32:13,383 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 174 transitions, 1806 flow [2024-11-10 10:32:13,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 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 10:32:13,383 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:13,384 INFO L204 CegarLoopForPetriNet]: trace histogram [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, 1, 1] [2024-11-10 10:32:13,384 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-10 10:32:13,384 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 10:32:13,384 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:13,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1437774447, now seen corresponding path program 2 times [2024-11-10 10:32:13,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:13,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366542771] [2024-11-10 10:32:13,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:13,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:13,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:13,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 10:32:13,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:13,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366542771] [2024-11-10 10:32:13,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366542771] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:32:13,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:32:13,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-10 10:32:13,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815858633] [2024-11-10 10:32:13,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:32:13,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 10:32:13,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:13,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 10:32:13,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-10 10:32:13,460 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 38 [2024-11-10 10:32:13,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 174 transitions, 1806 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:32:13,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:13,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 38 [2024-11-10 10:32:13,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:13,622 INFO L124 PetriNetUnfolderBase]: 685/1305 cut-off events. [2024-11-10 10:32:13,622 INFO L125 PetriNetUnfolderBase]: For 6505/6547 co-relation queries the response was YES. [2024-11-10 10:32:13,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5918 conditions, 1305 events. 685/1305 cut-off events. For 6505/6547 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 7110 event pairs, 209 based on Foata normal form. 8/1300 useless extension candidates. Maximal degree in co-relation 5885. Up to 705 conditions per place. [2024-11-10 10:32:13,657 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 123 selfloop transitions, 34 changer transitions 4/187 dead transitions. [2024-11-10 10:32:13,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 187 transitions, 2151 flow [2024-11-10 10:32:13,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 10:32:13,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 10:32:13,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-11-10 10:32:13,661 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4692982456140351 [2024-11-10 10:32:13,661 INFO L175 Difference]: Start difference. First operand has 121 places, 174 transitions, 1806 flow. Second operand 6 states and 107 transitions. [2024-11-10 10:32:13,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 187 transitions, 2151 flow [2024-11-10 10:32:13,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 187 transitions, 2069 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 10:32:13,679 INFO L231 Difference]: Finished difference. Result has 125 places, 169 transitions, 1734 flow [2024-11-10 10:32:13,679 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1680, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1734, PETRI_PLACES=125, PETRI_TRANSITIONS=169} [2024-11-10 10:32:13,680 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 91 predicate places. [2024-11-10 10:32:13,680 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 169 transitions, 1734 flow [2024-11-10 10:32:13,681 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:32:13,681 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:13,681 INFO L204 CegarLoopForPetriNet]: trace histogram [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, 1, 1] [2024-11-10 10:32:13,681 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-10 10:32:13,681 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 10:32:13,681 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:13,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1479161305, now seen corresponding path program 3 times [2024-11-10 10:32:13,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:13,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735136381] [2024-11-10 10:32:13,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:13,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:13,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:13,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 10:32:13,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:13,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735136381] [2024-11-10 10:32:13,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735136381] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:32:13,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640029221] [2024-11-10 10:32:13,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 10:32:13,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:32:13,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:32:13,754 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 10:32:13,755 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 10:32:13,818 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-10 10:32:13,818 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:32:13,819 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-10 10:32:13,820 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:32:13,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 10:32:13,848 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:32:13,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 10:32:13,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640029221] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:32:13,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:32:13,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-11-10 10:32:13,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980304418] [2024-11-10 10:32:13,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:32:13,875 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-10 10:32:13,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:13,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-10 10:32:13,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-11-10 10:32:13,889 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 38 [2024-11-10 10:32:13,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 169 transitions, 1734 flow. Second operand has 11 states, 11 states have (on average 11.909090909090908) internal successors, (131), 11 states have internal predecessors, (131), 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 10:32:13,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:13,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 38 [2024-11-10 10:32:13,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:14,152 INFO L124 PetriNetUnfolderBase]: 722/1328 cut-off events. [2024-11-10 10:32:14,152 INFO L125 PetriNetUnfolderBase]: For 6316/6316 co-relation queries the response was YES. [2024-11-10 10:32:14,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5942 conditions, 1328 events. 722/1328 cut-off events. For 6316/6316 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 7036 event pairs, 155 based on Foata normal form. 11/1337 useless extension candidates. Maximal degree in co-relation 5907. Up to 533 conditions per place. [2024-11-10 10:32:14,160 INFO L140 encePairwiseOnDemand]: 28/38 looper letters, 139 selfloop transitions, 65 changer transitions 2/214 dead transitions. [2024-11-10 10:32:14,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 214 transitions, 2396 flow [2024-11-10 10:32:14,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-10 10:32:14,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-10 10:32:14,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-11-10 10:32:14,161 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4678362573099415 [2024-11-10 10:32:14,161 INFO L175 Difference]: Start difference. First operand has 125 places, 169 transitions, 1734 flow. Second operand 9 states and 160 transitions. [2024-11-10 10:32:14,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 214 transitions, 2396 flow [2024-11-10 10:32:14,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 214 transitions, 2304 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-11-10 10:32:14,176 INFO L231 Difference]: Finished difference. Result has 127 places, 177 transitions, 1903 flow [2024-11-10 10:32:14,176 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1595, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1903, PETRI_PLACES=127, PETRI_TRANSITIONS=177} [2024-11-10 10:32:14,176 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 93 predicate places. [2024-11-10 10:32:14,177 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 177 transitions, 1903 flow [2024-11-10 10:32:14,177 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.909090909090908) internal successors, (131), 11 states have internal predecessors, (131), 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 10:32:14,177 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:14,177 INFO L204 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1] [2024-11-10 10:32:14,191 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 10:32:14,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-10 10:32:14,382 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 10:32:14,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:14,382 INFO L85 PathProgramCache]: Analyzing trace with hash -808536608, now seen corresponding path program 1 times [2024-11-10 10:32:14,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:14,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125642277] [2024-11-10 10:32:14,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:14,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:14,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:14,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:32:14,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:14,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125642277] [2024-11-10 10:32:14,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125642277] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:32:14,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:32:14,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 10:32:14,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073600321] [2024-11-10 10:32:14,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:32:14,442 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 10:32:14,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:14,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 10:32:14,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 10:32:14,444 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2024-11-10 10:32:14,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 177 transitions, 1903 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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 10:32:14,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:14,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2024-11-10 10:32:14,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:14,568 INFO L124 PetriNetUnfolderBase]: 506/1082 cut-off events. [2024-11-10 10:32:14,568 INFO L125 PetriNetUnfolderBase]: For 6200/6252 co-relation queries the response was YES. [2024-11-10 10:32:14,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5242 conditions, 1082 events. 506/1082 cut-off events. For 6200/6252 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 6227 event pairs, 189 based on Foata normal form. 12/1081 useless extension candidates. Maximal degree in co-relation 5205. Up to 727 conditions per place. [2024-11-10 10:32:14,576 INFO L140 encePairwiseOnDemand]: 33/38 looper letters, 115 selfloop transitions, 2 changer transitions 16/190 dead transitions. [2024-11-10 10:32:14,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 190 transitions, 2281 flow [2024-11-10 10:32:14,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 10:32:14,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 10:32:14,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-11-10 10:32:14,577 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4789473684210526 [2024-11-10 10:32:14,577 INFO L175 Difference]: Start difference. First operand has 127 places, 177 transitions, 1903 flow. Second operand 5 states and 91 transitions. [2024-11-10 10:32:14,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 190 transitions, 2281 flow [2024-11-10 10:32:14,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 190 transitions, 2108 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-11-10 10:32:14,594 INFO L231 Difference]: Finished difference. Result has 119 places, 174 transitions, 1730 flow [2024-11-10 10:32:14,594 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1740, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1730, PETRI_PLACES=119, PETRI_TRANSITIONS=174} [2024-11-10 10:32:14,595 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 85 predicate places. [2024-11-10 10:32:14,595 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 174 transitions, 1730 flow [2024-11-10 10:32:14,595 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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 10:32:14,595 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:14,595 INFO L204 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1] [2024-11-10 10:32:14,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-10 10:32:14,595 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 10:32:14,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:14,596 INFO L85 PathProgramCache]: Analyzing trace with hash 546090289, now seen corresponding path program 1 times [2024-11-10 10:32:14,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:14,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688593529] [2024-11-10 10:32:14,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:14,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:14,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:14,775 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:32:14,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:14,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688593529] [2024-11-10 10:32:14,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688593529] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:32:14,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140235317] [2024-11-10 10:32:14,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:14,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:32:14,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:32:14,778 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 10:32:14,779 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 10:32:14,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:14,849 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-10 10:32:14,851 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:32:14,929 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:32:14,929 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:32:14,961 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 36 treesize of output 12 [2024-11-10 10:32:15,015 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:32:15,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140235317] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:32:15,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:32:15,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2024-11-10 10:32:15,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282965016] [2024-11-10 10:32:15,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:32:15,016 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-10 10:32:15,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:15,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-10 10:32:15,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-10 10:32:15,020 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2024-11-10 10:32:15,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 174 transitions, 1730 flow. Second operand has 11 states, 11 states have (on average 14.090909090909092) internal successors, (155), 11 states have internal predecessors, (155), 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 10:32:15,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:15,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2024-11-10 10:32:15,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:15,379 INFO L124 PetriNetUnfolderBase]: 1495/2991 cut-off events. [2024-11-10 10:32:15,379 INFO L125 PetriNetUnfolderBase]: For 13359/13587 co-relation queries the response was YES. [2024-11-10 10:32:15,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13959 conditions, 2991 events. 1495/2991 cut-off events. For 13359/13587 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 20620 event pairs, 177 based on Foata normal form. 92/3057 useless extension candidates. Maximal degree in co-relation 13929. Up to 695 conditions per place. [2024-11-10 10:32:15,399 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 385 selfloop transitions, 15 changer transitions 18/475 dead transitions. [2024-11-10 10:32:15,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 475 transitions, 5807 flow [2024-11-10 10:32:15,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-10 10:32:15,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-10 10:32:15,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-11-10 10:32:15,400 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5105263157894737 [2024-11-10 10:32:15,400 INFO L175 Difference]: Start difference. First operand has 119 places, 174 transitions, 1730 flow. Second operand 10 states and 194 transitions. [2024-11-10 10:32:15,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 475 transitions, 5807 flow [2024-11-10 10:32:15,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 475 transitions, 5783 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-11-10 10:32:15,432 INFO L231 Difference]: Finished difference. Result has 125 places, 188 transitions, 1837 flow [2024-11-10 10:32:15,433 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1714, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1837, PETRI_PLACES=125, PETRI_TRANSITIONS=188} [2024-11-10 10:32:15,433 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 91 predicate places. [2024-11-10 10:32:15,433 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 188 transitions, 1837 flow [2024-11-10 10:32:15,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.090909090909092) internal successors, (155), 11 states have internal predecessors, (155), 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 10:32:15,434 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:15,434 INFO L204 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1] [2024-11-10 10:32:15,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-10 10:32:15,637 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:32:15,638 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 10:32:15,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:15,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1530798789, now seen corresponding path program 2 times [2024-11-10 10:32:15,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:15,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665897325] [2024-11-10 10:32:15,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:15,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:15,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:15,798 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:32:15,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:15,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665897325] [2024-11-10 10:32:15,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665897325] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:32:15,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101536049] [2024-11-10 10:32:15,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 10:32:15,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:32:15,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:32:15,801 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 10:32:15,809 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 10:32:15,882 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 10:32:15,882 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:32:15,883 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-10 10:32:15,885 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:32:15,936 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:32:15,936 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:32:15,962 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 36 treesize of output 12 [2024-11-10 10:32:16,009 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:32:16,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101536049] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:32:16,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:32:16,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2024-11-10 10:32:16,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894957702] [2024-11-10 10:32:16,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:32:16,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-10 10:32:16,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:16,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-10 10:32:16,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-10 10:32:16,017 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2024-11-10 10:32:16,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 188 transitions, 1837 flow. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 11 states have internal predecessors, (151), 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 10:32:16,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:16,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2024-11-10 10:32:16,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:16,801 INFO L124 PetriNetUnfolderBase]: 3808/7617 cut-off events. [2024-11-10 10:32:16,801 INFO L125 PetriNetUnfolderBase]: For 36381/37201 co-relation queries the response was YES. [2024-11-10 10:32:16,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37064 conditions, 7617 events. 3808/7617 cut-off events. For 36381/37201 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 61792 event pairs, 456 based on Foata normal form. 325/7873 useless extension candidates. Maximal degree in co-relation 37031. Up to 2096 conditions per place. [2024-11-10 10:32:16,844 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 396 selfloop transitions, 24 changer transitions 35/512 dead transitions. [2024-11-10 10:32:16,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 512 transitions, 6218 flow [2024-11-10 10:32:16,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-10 10:32:16,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-10 10:32:16,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-11-10 10:32:16,847 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5146198830409356 [2024-11-10 10:32:16,847 INFO L175 Difference]: Start difference. First operand has 125 places, 188 transitions, 1837 flow. Second operand 9 states and 176 transitions. [2024-11-10 10:32:16,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 512 transitions, 6218 flow [2024-11-10 10:32:16,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 512 transitions, 6172 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-11-10 10:32:17,002 INFO L231 Difference]: Finished difference. Result has 138 places, 207 transitions, 2035 flow [2024-11-10 10:32:17,002 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1819, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2035, PETRI_PLACES=138, PETRI_TRANSITIONS=207} [2024-11-10 10:32:17,002 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 104 predicate places. [2024-11-10 10:32:17,002 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 207 transitions, 2035 flow [2024-11-10 10:32:17,003 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 11 states have internal predecessors, (151), 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 10:32:17,003 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:17,003 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 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 10:32:17,016 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-10 10:32:17,205 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:32:17,206 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 10:32:17,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:17,206 INFO L85 PathProgramCache]: Analyzing trace with hash -2097019134, now seen corresponding path program 3 times [2024-11-10 10:32:17,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:17,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667511938] [2024-11-10 10:32:17,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:17,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:17,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:17,319 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 10:32:17,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:17,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667511938] [2024-11-10 10:32:17,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667511938] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:32:17,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573936808] [2024-11-10 10:32:17,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 10:32:17,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:32:17,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:32:17,325 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 10:32:17,336 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 10:32:17,441 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-10 10:32:17,441 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:32:17,443 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-10 10:32:17,444 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:32:17,535 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 10:32:17,535 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:32:17,585 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 10:32:17,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573936808] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:32:17,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:32:17,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-10 10:32:17,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141615597] [2024-11-10 10:32:17,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:32:17,587 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-10 10:32:17,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:17,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-10 10:32:17,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-11-10 10:32:17,640 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 38 [2024-11-10 10:32:17,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 207 transitions, 2035 flow. Second operand has 15 states, 15 states have (on average 12.733333333333333) internal successors, (191), 15 states have internal predecessors, (191), 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 10:32:17,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:17,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 38 [2024-11-10 10:32:17,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:19,420 INFO L124 PetriNetUnfolderBase]: 7184/12866 cut-off events. [2024-11-10 10:32:19,420 INFO L125 PetriNetUnfolderBase]: For 59734/59734 co-relation queries the response was YES. [2024-11-10 10:32:19,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61126 conditions, 12866 events. 7184/12866 cut-off events. For 59734/59734 co-relation queries the response was YES. Maximal size of possible extension queue 653. Compared 99465 event pairs, 322 based on Foata normal form. 308/13174 useless extension candidates. Maximal degree in co-relation 61086. Up to 2571 conditions per place. [2024-11-10 10:32:19,495 INFO L140 encePairwiseOnDemand]: 28/38 looper letters, 428 selfloop transitions, 190 changer transitions 12/639 dead transitions. [2024-11-10 10:32:19,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 639 transitions, 6768 flow [2024-11-10 10:32:19,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-10 10:32:19,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-11-10 10:32:19,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 500 transitions. [2024-11-10 10:32:19,497 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43859649122807015 [2024-11-10 10:32:19,497 INFO L175 Difference]: Start difference. First operand has 138 places, 207 transitions, 2035 flow. Second operand 30 states and 500 transitions. [2024-11-10 10:32:19,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 639 transitions, 6768 flow [2024-11-10 10:32:19,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 639 transitions, 6715 flow, removed 25 selfloop flow, removed 1 redundant places. [2024-11-10 10:32:19,697 INFO L231 Difference]: Finished difference. Result has 186 places, 312 transitions, 3814 flow [2024-11-10 10:32:19,697 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=2022, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=3814, PETRI_PLACES=186, PETRI_TRANSITIONS=312} [2024-11-10 10:32:19,698 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 152 predicate places. [2024-11-10 10:32:19,698 INFO L471 AbstractCegarLoop]: Abstraction has has 186 places, 312 transitions, 3814 flow [2024-11-10 10:32:19,698 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 12.733333333333333) internal successors, (191), 15 states have internal predecessors, (191), 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 10:32:19,698 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:19,698 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 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 10:32:19,711 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 10:32:19,899 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:32:19,899 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 10:32:19,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:19,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1857850126, now seen corresponding path program 4 times [2024-11-10 10:32:19,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:19,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131390887] [2024-11-10 10:32:19,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:19,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:19,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:20,060 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 10:32:20,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:20,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131390887] [2024-11-10 10:32:20,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131390887] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:32:20,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479434519] [2024-11-10 10:32:20,061 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-10 10:32:20,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:32:20,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:32:20,063 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 10:32:20,064 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 10:32:20,137 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-10 10:32:20,137 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:32:20,138 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-10 10:32:20,140 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:32:20,192 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 10:32:20,192 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:32:20,237 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 10:32:20,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479434519] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:32:20,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:32:20,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-10 10:32:20,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363502563] [2024-11-10 10:32:20,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:32:20,238 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-10 10:32:20,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:20,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-10 10:32:20,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-10 10:32:20,246 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 38 [2024-11-10 10:32:20,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 312 transitions, 3814 flow. Second operand has 11 states, 11 states have (on average 12.818181818181818) internal successors, (141), 11 states have internal predecessors, (141), 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 10:32:20,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:20,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 38 [2024-11-10 10:32:20,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:23,060 INFO L124 PetriNetUnfolderBase]: 10078/17986 cut-off events. [2024-11-10 10:32:23,061 INFO L125 PetriNetUnfolderBase]: For 183480/183480 co-relation queries the response was YES. [2024-11-10 10:32:23,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103555 conditions, 17986 events. 10078/17986 cut-off events. For 183480/183480 co-relation queries the response was YES. Maximal size of possible extension queue 820. Compared 144944 event pairs, 601 based on Foata normal form. 109/18095 useless extension candidates. Maximal degree in co-relation 103495. Up to 3649 conditions per place. [2024-11-10 10:32:23,213 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 322 selfloop transitions, 253 changer transitions 9/593 dead transitions. [2024-11-10 10:32:23,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 593 transitions, 7851 flow [2024-11-10 10:32:23,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-10 10:32:23,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-10 10:32:23,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 253 transitions. [2024-11-10 10:32:23,214 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.443859649122807 [2024-11-10 10:32:23,214 INFO L175 Difference]: Start difference. First operand has 186 places, 312 transitions, 3814 flow. Second operand 15 states and 253 transitions. [2024-11-10 10:32:23,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 593 transitions, 7851 flow [2024-11-10 10:32:24,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 593 transitions, 7554 flow, removed 141 selfloop flow, removed 2 redundant places. [2024-11-10 10:32:24,948 INFO L231 Difference]: Finished difference. Result has 205 places, 408 transitions, 5663 flow [2024-11-10 10:32:24,948 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=3645, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5663, PETRI_PLACES=205, PETRI_TRANSITIONS=408} [2024-11-10 10:32:24,948 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 171 predicate places. [2024-11-10 10:32:24,948 INFO L471 AbstractCegarLoop]: Abstraction has has 205 places, 408 transitions, 5663 flow [2024-11-10 10:32:24,949 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.818181818181818) internal successors, (141), 11 states have internal predecessors, (141), 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 10:32:24,949 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:24,949 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 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 10:32:24,962 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 10:32:25,149 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,SelfDestructingSolverStorable20 [2024-11-10 10:32:25,150 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:32:25,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:25,150 INFO L85 PathProgramCache]: Analyzing trace with hash 459584452, now seen corresponding path program 5 times [2024-11-10 10:32:25,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:25,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54284120] [2024-11-10 10:32:25,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:25,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:25,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:25,225 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 10:32:25,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:25,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54284120] [2024-11-10 10:32:25,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54284120] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:32:25,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189338869] [2024-11-10 10:32:25,226 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-10 10:32:25,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:32:25,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:32:25,227 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 10:32:25,228 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 10:32:25,305 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-10 10:32:25,306 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:32:25,307 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-10 10:32:25,308 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:32:25,358 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 10:32:25,358 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:32:25,403 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 10:32:25,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189338869] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:32:25,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:32:25,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-11-10 10:32:25,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872181538] [2024-11-10 10:32:25,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:32:25,404 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-10 10:32:25,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:25,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-10 10:32:25,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-11-10 10:32:25,415 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 38 [2024-11-10 10:32:25,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 408 transitions, 5663 flow. Second operand has 13 states, 13 states have (on average 12.538461538461538) internal successors, (163), 13 states have internal predecessors, (163), 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 10:32:25,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:25,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 38 [2024-11-10 10:32:25,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:29,398 INFO L124 PetriNetUnfolderBase]: 13344/23824 cut-off events. [2024-11-10 10:32:29,398 INFO L125 PetriNetUnfolderBase]: For 314887/314887 co-relation queries the response was YES. [2024-11-10 10:32:29,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146129 conditions, 23824 events. 13344/23824 cut-off events. For 314887/314887 co-relation queries the response was YES. Maximal size of possible extension queue 961. Compared 197170 event pairs, 668 based on Foata normal form. 238/24062 useless extension candidates. Maximal degree in co-relation 146062. Up to 4486 conditions per place. [2024-11-10 10:32:29,608 INFO L140 encePairwiseOnDemand]: 29/38 looper letters, 357 selfloop transitions, 364 changer transitions 10/740 dead transitions. [2024-11-10 10:32:29,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 740 transitions, 10696 flow [2024-11-10 10:32:29,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-10 10:32:29,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-10 10:32:29,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 290 transitions. [2024-11-10 10:32:29,610 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44891640866873067 [2024-11-10 10:32:29,610 INFO L175 Difference]: Start difference. First operand has 205 places, 408 transitions, 5663 flow. Second operand 17 states and 290 transitions. [2024-11-10 10:32:29,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 740 transitions, 10696 flow [2024-11-10 10:32:32,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 740 transitions, 10609 flow, removed 23 selfloop flow, removed 1 redundant places. [2024-11-10 10:32:32,753 INFO L231 Difference]: Finished difference. Result has 231 places, 528 transitions, 8738 flow [2024-11-10 10:32:32,754 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=5596, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=8738, PETRI_PLACES=231, PETRI_TRANSITIONS=528} [2024-11-10 10:32:32,754 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 197 predicate places. [2024-11-10 10:32:32,754 INFO L471 AbstractCegarLoop]: Abstraction has has 231 places, 528 transitions, 8738 flow [2024-11-10 10:32:32,754 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.538461538461538) internal successors, (163), 13 states have internal predecessors, (163), 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 10:32:32,754 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:32,754 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 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 10:32:32,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-10 10:32:32,955 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,SelfDestructingSolverStorable21 [2024-11-10 10:32:32,956 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:32:32,956 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:32,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1462554582, now seen corresponding path program 6 times [2024-11-10 10:32:32,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:32,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554943327] [2024-11-10 10:32:32,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:32,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:32,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:33,031 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 10:32:33,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:33,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554943327] [2024-11-10 10:32:33,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554943327] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:32:33,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135075019] [2024-11-10 10:32:33,033 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-10 10:32:33,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:32:33,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:32:33,034 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 10:32:33,035 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 10:32:33,113 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-10 10:32:33,113 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:32:33,114 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-10 10:32:33,115 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:32:33,156 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 10:32:33,157 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:32:33,184 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 10:32:33,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135075019] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:32:33,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:32:33,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-10 10:32:33,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351130694] [2024-11-10 10:32:33,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:32:33,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-10 10:32:33,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:33,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-10 10:32:33,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-11-10 10:32:33,194 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 38 [2024-11-10 10:32:33,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 528 transitions, 8738 flow. Second operand has 11 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 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 10:32:33,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:33,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 38 [2024-11-10 10:32:33,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:38,043 INFO L124 PetriNetUnfolderBase]: 14297/25413 cut-off events. [2024-11-10 10:32:38,044 INFO L125 PetriNetUnfolderBase]: For 481661/481661 co-relation queries the response was YES. [2024-11-10 10:32:38,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177824 conditions, 25413 events. 14297/25413 cut-off events. For 481661/481661 co-relation queries the response was YES. Maximal size of possible extension queue 1058. Compared 212767 event pairs, 3898 based on Foata normal form. 15/25422 useless extension candidates. Maximal degree in co-relation 177746. Up to 15854 conditions per place. [2024-11-10 10:32:38,279 INFO L140 encePairwiseOnDemand]: 29/38 looper letters, 586 selfloop transitions, 119 changer transitions 44/758 dead transitions. [2024-11-10 10:32:38,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 758 transitions, 13030 flow [2024-11-10 10:32:38,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-10 10:32:38,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-10 10:32:38,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 247 transitions. [2024-11-10 10:32:38,280 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-11-10 10:32:38,280 INFO L175 Difference]: Start difference. First operand has 231 places, 528 transitions, 8738 flow. Second operand 15 states and 247 transitions. [2024-11-10 10:32:38,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 758 transitions, 13030 flow [2024-11-10 10:32:44,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 758 transitions, 12852 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-11-10 10:32:44,114 INFO L231 Difference]: Finished difference. Result has 249 places, 568 transitions, 9684 flow [2024-11-10 10:32:44,115 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=8573, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=9684, PETRI_PLACES=249, PETRI_TRANSITIONS=568} [2024-11-10 10:32:44,115 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 215 predicate places. [2024-11-10 10:32:44,116 INFO L471 AbstractCegarLoop]: Abstraction has has 249 places, 568 transitions, 9684 flow [2024-11-10 10:32:44,116 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 states have internal predecessors, (139), 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 10:32:44,116 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:44,116 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 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 10:32:44,128 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 10:32:44,316 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,SelfDestructingSolverStorable22 [2024-11-10 10:32:44,317 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:32:44,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:44,317 INFO L85 PathProgramCache]: Analyzing trace with hash -270942402, now seen corresponding path program 7 times [2024-11-10 10:32:44,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:44,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806962561] [2024-11-10 10:32:44,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:44,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:44,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:44,389 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 10:32:44,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:44,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806962561] [2024-11-10 10:32:44,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806962561] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:32:44,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898598127] [2024-11-10 10:32:44,389 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-10 10:32:44,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:32:44,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:32:44,391 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 10:32:44,392 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 10:32:44,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:44,468 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-10 10:32:44,470 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:32:44,536 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 10:32:44,537 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:32:44,574 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 10:32:44,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898598127] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:32:44,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:32:44,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-11-10 10:32:44,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023742204] [2024-11-10 10:32:44,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:32:44,576 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-10 10:32:44,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:44,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-10 10:32:44,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-11-10 10:32:44,595 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 38 [2024-11-10 10:32:44,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 568 transitions, 9684 flow. Second operand has 12 states, 12 states have (on average 12.75) internal successors, (153), 12 states have internal predecessors, (153), 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 10:32:44,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:44,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 38 [2024-11-10 10:32:44,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:51,077 INFO L124 PetriNetUnfolderBase]: 17925/31501 cut-off events. [2024-11-10 10:32:51,077 INFO L125 PetriNetUnfolderBase]: For 685849/685861 co-relation queries the response was YES. [2024-11-10 10:32:51,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232138 conditions, 31501 events. 17925/31501 cut-off events. For 685849/685861 co-relation queries the response was YES. Maximal size of possible extension queue 1351. Compared 269939 event pairs, 2895 based on Foata normal form. 202/31697 useless extension candidates. Maximal degree in co-relation 232052. Up to 12618 conditions per place. [2024-11-10 10:32:51,527 INFO L140 encePairwiseOnDemand]: 28/38 looper letters, 745 selfloop transitions, 268 changer transitions 10/1032 dead transitions. [2024-11-10 10:32:51,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 1032 transitions, 17498 flow [2024-11-10 10:32:51,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-10 10:32:51,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-10 10:32:51,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 400 transitions. [2024-11-10 10:32:51,529 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4576659038901602 [2024-11-10 10:32:51,529 INFO L175 Difference]: Start difference. First operand has 249 places, 568 transitions, 9684 flow. Second operand 23 states and 400 transitions. [2024-11-10 10:32:51,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 1032 transitions, 17498 flow [2024-11-10 10:33:02,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 1032 transitions, 16834 flow, removed 248 selfloop flow, removed 6 redundant places. [2024-11-10 10:33:02,894 INFO L231 Difference]: Finished difference. Result has 275 places, 678 transitions, 12398 flow [2024-11-10 10:33:02,895 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=9351, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=12398, PETRI_PLACES=275, PETRI_TRANSITIONS=678} [2024-11-10 10:33:02,895 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 241 predicate places. [2024-11-10 10:33:02,895 INFO L471 AbstractCegarLoop]: Abstraction has has 275 places, 678 transitions, 12398 flow [2024-11-10 10:33:02,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.75) internal successors, (153), 12 states have internal predecessors, (153), 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 10:33:02,895 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:33:02,895 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 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 10:33:02,907 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 10:33:03,096 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,SelfDestructingSolverStorable23 [2024-11-10 10:33:03,096 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:33:03,096 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:33:03,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1281162134, now seen corresponding path program 8 times [2024-11-10 10:33:03,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:33:03,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056472012] [2024-11-10 10:33:03,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:33:03,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:33:03,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:33:03,175 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 10:33:03,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:33:03,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056472012] [2024-11-10 10:33:03,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056472012] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:33:03,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584758773] [2024-11-10 10:33:03,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 10:33:03,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:33:03,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:33:03,178 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 10:33:03,179 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 10:33:03,259 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 10:33:03,259 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:33:03,260 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-10 10:33:03,261 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:33:03,310 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 10:33:03,311 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:33:03,347 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 10:33:03,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584758773] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:33:03,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:33:03,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-11-10 10:33:03,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234368440] [2024-11-10 10:33:03,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:33:03,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-10 10:33:03,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:33:03,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-10 10:33:03,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-10 10:33:03,359 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 38 [2024-11-10 10:33:03,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 678 transitions, 12398 flow. Second operand has 13 states, 13 states have (on average 12.23076923076923) internal successors, (159), 13 states have internal predecessors, (159), 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 10:33:03,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:33:03,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 38 [2024-11-10 10:33:03,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:33:10,736 INFO L124 PetriNetUnfolderBase]: 18162/32052 cut-off events. [2024-11-10 10:33:10,736 INFO L125 PetriNetUnfolderBase]: For 750771/750771 co-relation queries the response was YES. [2024-11-10 10:33:11,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245892 conditions, 32052 events. 18162/32052 cut-off events. For 750771/750771 co-relation queries the response was YES. Maximal size of possible extension queue 1387. Compared 276730 event pairs, 4860 based on Foata normal form. 58/32104 useless extension candidates. Maximal degree in co-relation 245797. Up to 20149 conditions per place. [2024-11-10 10:33:11,243 INFO L140 encePairwiseOnDemand]: 28/38 looper letters, 713 selfloop transitions, 205 changer transitions 62/989 dead transitions. [2024-11-10 10:33:11,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 989 transitions, 17697 flow [2024-11-10 10:33:11,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-10 10:33:11,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-10 10:33:11,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 360 transitions. [2024-11-10 10:33:11,245 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41189931350114417 [2024-11-10 10:33:11,245 INFO L175 Difference]: Start difference. First operand has 275 places, 678 transitions, 12398 flow. Second operand 23 states and 360 transitions. [2024-11-10 10:33:11,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 989 transitions, 17697 flow [2024-11-10 10:33:21,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 989 transitions, 17221 flow, removed 142 selfloop flow, removed 7 redundant places. [2024-11-10 10:33:21,241 INFO L231 Difference]: Finished difference. Result has 305 places, 699 transitions, 13067 flow [2024-11-10 10:33:21,241 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=12024, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=13067, PETRI_PLACES=305, PETRI_TRANSITIONS=699} [2024-11-10 10:33:21,242 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 271 predicate places. [2024-11-10 10:33:21,242 INFO L471 AbstractCegarLoop]: Abstraction has has 305 places, 699 transitions, 13067 flow [2024-11-10 10:33:21,242 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.23076923076923) internal successors, (159), 13 states have internal predecessors, (159), 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 10:33:21,242 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:33:21,242 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 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 10:33:21,255 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 10:33:21,442 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:33:21,443 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:33:21,443 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:33:21,443 INFO L85 PathProgramCache]: Analyzing trace with hash -960765938, now seen corresponding path program 9 times [2024-11-10 10:33:21,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:33:21,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275743382] [2024-11-10 10:33:21,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:33:21,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:33:21,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:33:21,510 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-10 10:33:21,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:33:21,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275743382] [2024-11-10 10:33:21,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275743382] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:33:21,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503790276] [2024-11-10 10:33:21,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 10:33:21,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:33:21,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:33:21,513 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 10:33:21,514 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 10:33:21,596 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-10 10:33:21,597 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:33:21,598 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-10 10:33:21,600 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:33:21,631 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 10:33:21,833 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-10 10:33:21,833 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:33:22,249 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:33:22,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 215 treesize of output 209 [2024-11-10 10:33:22,281 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:33:22,282 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 85 treesize of output 75 [2024-11-10 10:33:22,428 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 10:33:22,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 280 treesize of output 286 [2024-11-10 10:33:24,319 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-10 10:33:24,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503790276] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:33:24,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:33:24,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 18 [2024-11-10 10:33:24,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406927012] [2024-11-10 10:33:24,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:33:24,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-10 10:33:24,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:33:24,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-10 10:33:24,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2024-11-10 10:33:24,374 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 38 [2024-11-10 10:33:24,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 699 transitions, 13067 flow. Second operand has 18 states, 18 states have (on average 11.11111111111111) internal successors, (200), 18 states have internal predecessors, (200), 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 10:33:24,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:33:24,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 38 [2024-11-10 10:33:24,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:33:33,069 INFO L124 PetriNetUnfolderBase]: 19532/34711 cut-off events. [2024-11-10 10:33:33,069 INFO L125 PetriNetUnfolderBase]: For 828624/828624 co-relation queries the response was YES. [2024-11-10 10:33:33,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269106 conditions, 34711 events. 19532/34711 cut-off events. For 828624/828624 co-relation queries the response was YES. Maximal size of possible extension queue 1571. Compared 305428 event pairs, 1371 based on Foata normal form. 38/34746 useless extension candidates. Maximal degree in co-relation 268998. Up to 14750 conditions per place. [2024-11-10 10:33:33,722 INFO L140 encePairwiseOnDemand]: 20/38 looper letters, 698 selfloop transitions, 237 changer transitions 693/1633 dead transitions. [2024-11-10 10:33:33,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 1633 transitions, 31707 flow [2024-11-10 10:33:33,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-10 10:33:33,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-11-10 10:33:33,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 515 transitions. [2024-11-10 10:33:33,723 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37646198830409355 [2024-11-10 10:33:33,723 INFO L175 Difference]: Start difference. First operand has 305 places, 699 transitions, 13067 flow. Second operand 36 states and 515 transitions. [2024-11-10 10:33:33,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 1633 transitions, 31707 flow