./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-symm.wvr.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 6897befed0dbbae24492a1e82d50fcd0be6b3857b241d882a904d02a513d7a6d --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 14:24:48,835 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 14:24:48,909 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 14:24:48,914 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 14:24:48,915 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 14:24:48,948 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 14:24:48,948 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 14:24:48,949 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 14:24:48,949 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 14:24:48,950 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 14:24:48,950 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 14:24:48,951 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 14:24:48,951 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 14:24:48,952 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 14:24:48,952 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 14:24:48,953 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 14:24:48,953 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 14:24:48,953 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 14:24:48,954 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 14:24:48,954 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 14:24:48,954 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 14:24:48,955 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 14:24:48,955 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 14:24:48,956 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 14:24:48,956 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 14:24:48,956 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 14:24:48,957 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 14:24:48,957 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 14:24:48,957 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 14:24:48,958 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 14:24:48,958 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 14:24:48,958 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 14:24:48,959 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:24:48,959 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 14:24:48,959 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 14:24:48,959 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 14:24:48,960 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 14:24:48,960 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 14:24:48,960 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 14:24:48,960 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 14:24:48,961 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 14:24:48,965 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 14:24:48,966 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6897befed0dbbae24492a1e82d50fcd0be6b3857b241d882a904d02a513d7a6d [2024-10-11 14:24:49,217 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 14:24:49,236 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 14:24:49,239 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 14:24:49,240 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 14:24:49,241 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 14:24:49,242 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2024-10-11 14:24:50,652 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 14:24:50,816 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 14:24:50,817 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2024-10-11 14:24:50,824 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/c26575bb4/dbbe5bcf81ee4a1eb468d7966d4f4701/FLAG3f5c11a35 [2024-10-11 14:24:51,207 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/c26575bb4/dbbe5bcf81ee4a1eb468d7966d4f4701 [2024-10-11 14:24:51,209 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 14:24:51,211 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 14:24:51,212 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 14:24:51,212 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 14:24:51,217 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 14:24:51,217 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:24:51" (1/1) ... [2024-10-11 14:24:51,218 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ad86618 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:51, skipping insertion in model container [2024-10-11 14:24:51,218 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:24:51" (1/1) ... [2024-10-11 14:24:51,238 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 14:24:51,407 WARN L248 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/array-eq-symm.wvr.c[2277,2290] [2024-10-11 14:24:51,414 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:24:51,422 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 14:24:51,439 WARN L248 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/array-eq-symm.wvr.c[2277,2290] [2024-10-11 14:24:51,442 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:24:51,456 INFO L204 MainTranslator]: Completed translation [2024-10-11 14:24:51,457 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:51 WrapperNode [2024-10-11 14:24:51,457 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 14:24:51,458 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 14:24:51,458 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 14:24:51,458 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 14:24:51,464 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:51" (1/1) ... [2024-10-11 14:24:51,470 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:51" (1/1) ... [2024-10-11 14:24:51,489 INFO L138 Inliner]: procedures = 22, calls = 19, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 105 [2024-10-11 14:24:51,490 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 14:24:51,490 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 14:24:51,491 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 14:24:51,491 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 14:24:51,500 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:51" (1/1) ... [2024-10-11 14:24:51,501 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:51" (1/1) ... [2024-10-11 14:24:51,507 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:51" (1/1) ... [2024-10-11 14:24:51,531 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 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]. [2024-10-11 14:24:51,532 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:51" (1/1) ... [2024-10-11 14:24:51,532 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:51" (1/1) ... [2024-10-11 14:24:51,538 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:51" (1/1) ... [2024-10-11 14:24:51,544 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:51" (1/1) ... [2024-10-11 14:24:51,546 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:51" (1/1) ... [2024-10-11 14:24:51,547 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:51" (1/1) ... [2024-10-11 14:24:51,549 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 14:24:51,550 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 14:24:51,550 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 14:24:51,550 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 14:24:51,551 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:51" (1/1) ... [2024-10-11 14:24:51,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:24:51,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:24:51,589 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 14:24:51,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 14:24:51,642 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 14:24:51,642 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-11 14:24:51,643 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-11 14:24:51,643 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-11 14:24:51,644 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-11 14:24:51,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 14:24:51,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 14:24:51,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 14:24:51,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 14:24:51,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-11 14:24:51,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 14:24:51,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 14:24:51,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 14:24:51,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 14:24:51,648 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 14:24:51,796 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 14:24:51,798 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 14:24:52,094 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 14:24:52,094 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 14:24:52,281 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 14:24:52,281 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-11 14:24:52,282 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:24:52 BoogieIcfgContainer [2024-10-11 14:24:52,282 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 14:24:52,284 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 14:24:52,284 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 14:24:52,287 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 14:24:52,287 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:24:51" (1/3) ... [2024-10-11 14:24:52,288 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18b3c61d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:24:52, skipping insertion in model container [2024-10-11 14:24:52,289 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:24:51" (2/3) ... [2024-10-11 14:24:52,289 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18b3c61d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:24:52, skipping insertion in model container [2024-10-11 14:24:52,290 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:24:52" (3/3) ... [2024-10-11 14:24:52,291 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2024-10-11 14:24:52,307 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 14:24:52,307 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 14:24:52,308 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 14:24:52,352 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-11 14:24:52,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 29 places, 28 transitions, 70 flow [2024-10-11 14:24:52,414 INFO L124 PetriNetUnfolderBase]: 6/26 cut-off events. [2024-10-11 14:24:52,414 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 14:24:52,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 26 events. 6/26 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 25 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2024-10-11 14:24:52,417 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 28 transitions, 70 flow [2024-10-11 14:24:52,420 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 26 places, 25 transitions, 62 flow [2024-10-11 14:24:52,429 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:24:52,438 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;@19162438, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:24:52,438 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-11 14:24:52,447 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:24:52,447 INFO L124 PetriNetUnfolderBase]: 6/24 cut-off events. [2024-10-11 14:24:52,447 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 14:24:52,447 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:24:52,448 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:24:52,449 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:24:52,453 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:24:52,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1113111192, now seen corresponding path program 1 times [2024-10-11 14:24:52,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:24:52,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435887796] [2024-10-11 14:24:52,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:24:52,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:24:52,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:24:52,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:24:52,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:24:52,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435887796] [2024-10-11 14:24:52,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435887796] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:24:52,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:24:52,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 14:24:52,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273040963] [2024-10-11 14:24:52,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:24:52,944 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:24:52,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:24:52,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:24:52,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:24:52,979 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:24:52,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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) [2024-10-11 14:24:52,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:24:52,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:24:52,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:24:53,182 INFO L124 PetriNetUnfolderBase]: 207/323 cut-off events. [2024-10-11 14:24:53,182 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-10-11 14:24:53,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 674 conditions, 323 events. 207/323 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1131 event pairs, 42 based on Foata normal form. 1/220 useless extension candidates. Maximal degree in co-relation 596. Up to 208 conditions per place. [2024-10-11 14:24:53,189 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 33 selfloop transitions, 3 changer transitions 1/40 dead transitions. [2024-10-11 14:24:53,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 40 transitions, 175 flow [2024-10-11 14:24:53,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:24:53,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:24:53,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2024-10-11 14:24:53,203 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-10-11 14:24:53,205 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 62 flow. Second operand 3 states and 53 transitions. [2024-10-11 14:24:53,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 40 transitions, 175 flow [2024-10-11 14:24:53,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 40 transitions, 161 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-11 14:24:53,212 INFO L231 Difference]: Finished difference. Result has 25 places, 27 transitions, 73 flow [2024-10-11 14:24:53,214 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=25, PETRI_TRANSITIONS=27} [2024-10-11 14:24:53,219 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, -1 predicate places. [2024-10-11 14:24:53,220 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 27 transitions, 73 flow [2024-10-11 14:24:53,220 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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) [2024-10-11 14:24:53,220 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:24:53,220 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:24:53,220 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 14:24:53,220 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:24:53,221 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:24:53,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1220597756, now seen corresponding path program 1 times [2024-10-11 14:24:53,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:24:53,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262071796] [2024-10-11 14:24:53,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:24:53,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:24:53,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:24:53,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:24:53,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:24:53,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262071796] [2024-10-11 14:24:53,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262071796] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:24:53,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:24:53,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 14:24:53,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198257245] [2024-10-11 14:24:53,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:24:53,445 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 14:24:53,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:24:53,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 14:24:53,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 14:24:53,447 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:24:53,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 27 transitions, 73 flow. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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) [2024-10-11 14:24:53,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:24:53,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:24:53,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:24:53,595 INFO L124 PetriNetUnfolderBase]: 292/481 cut-off events. [2024-10-11 14:24:53,595 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2024-10-11 14:24:53,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1055 conditions, 481 events. 292/481 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 1950 event pairs, 170 based on Foata normal form. 0/402 useless extension candidates. Maximal degree in co-relation 392. Up to 319 conditions per place. [2024-10-11 14:24:53,599 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 40 selfloop transitions, 5 changer transitions 0/48 dead transitions. [2024-10-11 14:24:53,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 48 transitions, 216 flow [2024-10-11 14:24:53,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:24:53,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:24:53,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 68 transitions. [2024-10-11 14:24:53,603 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2024-10-11 14:24:53,603 INFO L175 Difference]: Start difference. First operand has 25 places, 27 transitions, 73 flow. Second operand 5 states and 68 transitions. [2024-10-11 14:24:53,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 48 transitions, 216 flow [2024-10-11 14:24:53,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 48 transitions, 212 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 14:24:53,605 INFO L231 Difference]: Finished difference. Result has 31 places, 31 transitions, 106 flow [2024-10-11 14:24:53,605 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=106, PETRI_PLACES=31, PETRI_TRANSITIONS=31} [2024-10-11 14:24:53,607 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 5 predicate places. [2024-10-11 14:24:53,608 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 31 transitions, 106 flow [2024-10-11 14:24:53,608 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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) [2024-10-11 14:24:53,608 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:24:53,608 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:24:53,608 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 14:24:53,609 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:24:53,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:24:53,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1689689306, now seen corresponding path program 1 times [2024-10-11 14:24:53,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:24:53,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829179481] [2024-10-11 14:24:53,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:24:53,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:24:53,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:24:53,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:24:53,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:24:53,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829179481] [2024-10-11 14:24:53,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829179481] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:24:53,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:24:53,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 14:24:53,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933669817] [2024-10-11 14:24:53,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:24:53,775 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 14:24:53,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:24:53,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 14:24:53,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 14:24:53,777 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:24:53,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 31 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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) [2024-10-11 14:24:53,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:24:53,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:24:53,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:24:53,918 INFO L124 PetriNetUnfolderBase]: 231/382 cut-off events. [2024-10-11 14:24:53,918 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2024-10-11 14:24:53,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 865 conditions, 382 events. 231/382 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1410 event pairs, 130 based on Foata normal form. 0/348 useless extension candidates. Maximal degree in co-relation 725. Up to 319 conditions per place. [2024-10-11 14:24:53,921 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 23 selfloop transitions, 2 changer transitions 15/43 dead transitions. [2024-10-11 14:24:53,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 43 transitions, 218 flow [2024-10-11 14:24:53,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:24:53,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:24:53,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2024-10-11 14:24:53,923 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-10-11 14:24:53,923 INFO L175 Difference]: Start difference. First operand has 31 places, 31 transitions, 106 flow. Second operand 5 states and 64 transitions. [2024-10-11 14:24:53,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 43 transitions, 218 flow [2024-10-11 14:24:53,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 43 transitions, 212 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-10-11 14:24:53,927 INFO L231 Difference]: Finished difference. Result has 35 places, 28 transitions, 90 flow [2024-10-11 14:24:53,928 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=90, PETRI_PLACES=35, PETRI_TRANSITIONS=28} [2024-10-11 14:24:53,929 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 9 predicate places. [2024-10-11 14:24:53,930 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 28 transitions, 90 flow [2024-10-11 14:24:53,930 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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) [2024-10-11 14:24:53,930 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:24:53,931 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:24:53,931 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 14:24:53,931 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:24:53,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:24:53,932 INFO L85 PathProgramCache]: Analyzing trace with hash 140296278, now seen corresponding path program 1 times [2024-10-11 14:24:53,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:24:53,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924216157] [2024-10-11 14:24:53,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:24:53,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:24:53,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:24:54,071 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:24:54,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:24:54,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924216157] [2024-10-11 14:24:54,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924216157] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:24:54,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:24:54,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 14:24:54,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994039377] [2024-10-11 14:24:54,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:24:54,074 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 14:24:54,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:24:54,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 14:24:54,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-11 14:24:54,075 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:24:54,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 28 transitions, 90 flow. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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) [2024-10-11 14:24:54,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:24:54,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:24:54,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:24:54,203 INFO L124 PetriNetUnfolderBase]: 337/556 cut-off events. [2024-10-11 14:24:54,203 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2024-10-11 14:24:54,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1287 conditions, 556 events. 337/556 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2315 event pairs, 155 based on Foata normal form. 18/569 useless extension candidates. Maximal degree in co-relation 1271. Up to 220 conditions per place. [2024-10-11 14:24:54,208 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 52 selfloop transitions, 6 changer transitions 0/61 dead transitions. [2024-10-11 14:24:54,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 61 transitions, 301 flow [2024-10-11 14:24:54,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:24:54,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:24:54,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 80 transitions. [2024-10-11 14:24:54,210 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-10-11 14:24:54,210 INFO L175 Difference]: Start difference. First operand has 35 places, 28 transitions, 90 flow. Second operand 5 states and 80 transitions. [2024-10-11 14:24:54,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 61 transitions, 301 flow [2024-10-11 14:24:54,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 61 transitions, 279 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-10-11 14:24:54,213 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 115 flow [2024-10-11 14:24:54,213 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=115, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2024-10-11 14:24:54,214 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 7 predicate places. [2024-10-11 14:24:54,214 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 115 flow [2024-10-11 14:24:54,214 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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) [2024-10-11 14:24:54,214 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:24:54,214 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:24:54,215 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 14:24:54,215 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:24:54,215 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:24:54,215 INFO L85 PathProgramCache]: Analyzing trace with hash 880851478, now seen corresponding path program 1 times [2024-10-11 14:24:54,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:24:54,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493323506] [2024-10-11 14:24:54,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:24:54,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:24:54,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:24:54,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:24:54,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:24:54,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493323506] [2024-10-11 14:24:54,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493323506] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:24:54,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:24:54,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 14:24:54,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662211847] [2024-10-11 14:24:54,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:24:54,325 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 14:24:54,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:24:54,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 14:24:54,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-11 14:24:54,327 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:24:54,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 115 flow. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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) [2024-10-11 14:24:54,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:24:54,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:24:54,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:24:54,447 INFO L124 PetriNetUnfolderBase]: 321/532 cut-off events. [2024-10-11 14:24:54,449 INFO L125 PetriNetUnfolderBase]: For 147/147 co-relation queries the response was YES. [2024-10-11 14:24:54,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1253 conditions, 532 events. 321/532 cut-off events. For 147/147 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2081 event pairs, 115 based on Foata normal form. 0/494 useless extension candidates. Maximal degree in co-relation 1230. Up to 238 conditions per place. [2024-10-11 14:24:54,452 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 36 selfloop transitions, 5 changer transitions 11/55 dead transitions. [2024-10-11 14:24:54,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 55 transitions, 283 flow [2024-10-11 14:24:54,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:24:54,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:24:54,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 74 transitions. [2024-10-11 14:24:54,454 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2024-10-11 14:24:54,455 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 115 flow. Second operand 5 states and 74 transitions. [2024-10-11 14:24:54,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 55 transitions, 283 flow [2024-10-11 14:24:54,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 55 transitions, 278 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-11 14:24:54,458 INFO L231 Difference]: Finished difference. Result has 38 places, 31 transitions, 127 flow [2024-10-11 14:24:54,458 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=127, PETRI_PLACES=38, PETRI_TRANSITIONS=31} [2024-10-11 14:24:54,459 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 12 predicate places. [2024-10-11 14:24:54,460 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 31 transitions, 127 flow [2024-10-11 14:24:54,461 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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) [2024-10-11 14:24:54,461 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:24:54,461 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] [2024-10-11 14:24:54,461 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-11 14:24:54,461 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:24:54,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:24:54,462 INFO L85 PathProgramCache]: Analyzing trace with hash 221294698, now seen corresponding path program 1 times [2024-10-11 14:24:54,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:24:54,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637593528] [2024-10-11 14:24:54,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:24:54,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:24:54,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:24:54,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:24:54,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:24:54,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637593528] [2024-10-11 14:24:54,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637593528] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:24:54,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515773920] [2024-10-11 14:24:54,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:24:54,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:24:54,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:24:54,698 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:24:54,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 14:24:54,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:24:54,788 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 14:24:54,793 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:24:54,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:24:54,969 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:24:55,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:24:55,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515773920] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-11 14:24:55,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-11 14:24:55,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 14 [2024-10-11 14:24:55,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157679815] [2024-10-11 14:24:55,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:24:55,133 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 14:24:55,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:24:55,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 14:24:55,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2024-10-11 14:24:55,135 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:24:55,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 127 flow. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 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) [2024-10-11 14:24:55,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:24:55,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:24:55,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:24:55,314 INFO L124 PetriNetUnfolderBase]: 323/544 cut-off events. [2024-10-11 14:24:55,315 INFO L125 PetriNetUnfolderBase]: For 258/258 co-relation queries the response was YES. [2024-10-11 14:24:55,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1375 conditions, 544 events. 323/544 cut-off events. For 258/258 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2116 event pairs, 93 based on Foata normal form. 16/557 useless extension candidates. Maximal degree in co-relation 1347. Up to 217 conditions per place. [2024-10-11 14:24:55,318 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 43 selfloop transitions, 8 changer transitions 0/54 dead transitions. [2024-10-11 14:24:55,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 54 transitions, 301 flow [2024-10-11 14:24:55,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:24:55,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:24:55,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 83 transitions. [2024-10-11 14:24:55,321 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42346938775510207 [2024-10-11 14:24:55,321 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 127 flow. Second operand 7 states and 83 transitions. [2024-10-11 14:24:55,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 54 transitions, 301 flow [2024-10-11 14:24:55,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 54 transitions, 286 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-10-11 14:24:55,325 INFO L231 Difference]: Finished difference. Result has 40 places, 32 transitions, 148 flow [2024-10-11 14:24:55,325 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=148, PETRI_PLACES=40, PETRI_TRANSITIONS=32} [2024-10-11 14:24:55,326 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 14 predicate places. [2024-10-11 14:24:55,326 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 32 transitions, 148 flow [2024-10-11 14:24:55,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 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) [2024-10-11 14:24:55,326 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:24:55,326 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] [2024-10-11 14:24:55,346 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 14:24:55,527 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:24:55,528 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:24:55,528 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:24:55,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1389849294, now seen corresponding path program 1 times [2024-10-11 14:24:55,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:24:55,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781797553] [2024-10-11 14:24:55,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:24:55,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:24:55,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:24:55,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:24:55,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:24:55,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781797553] [2024-10-11 14:24:55,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781797553] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:24:55,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742095196] [2024-10-11 14:24:55,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:24:55,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:24:55,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:24:55,689 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:24:55,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 14:24:55,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:24:55,770 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 14:24:55,771 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:24:55,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:24:55,861 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:24:55,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:24:55,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742095196] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-11 14:24:55,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-11 14:24:55,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 13 [2024-10-11 14:24:55,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39738398] [2024-10-11 14:24:55,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:24:55,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 14:24:55,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:24:55,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 14:24:55,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2024-10-11 14:24:55,951 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:24:55,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 32 transitions, 148 flow. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 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) [2024-10-11 14:24:55,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:24:55,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:24:55,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:24:56,127 INFO L124 PetriNetUnfolderBase]: 353/636 cut-off events. [2024-10-11 14:24:56,128 INFO L125 PetriNetUnfolderBase]: For 455/455 co-relation queries the response was YES. [2024-10-11 14:24:56,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1648 conditions, 636 events. 353/636 cut-off events. For 455/455 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2845 event pairs, 138 based on Foata normal form. 0/612 useless extension candidates. Maximal degree in co-relation 1618. Up to 223 conditions per place. [2024-10-11 14:24:56,132 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 50 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-10-11 14:24:56,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 61 transitions, 368 flow [2024-10-11 14:24:56,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:24:56,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:24:56,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 87 transitions. [2024-10-11 14:24:56,133 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44387755102040816 [2024-10-11 14:24:56,133 INFO L175 Difference]: Start difference. First operand has 40 places, 32 transitions, 148 flow. Second operand 7 states and 87 transitions. [2024-10-11 14:24:56,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 61 transitions, 368 flow [2024-10-11 14:24:56,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 61 transitions, 346 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-10-11 14:24:56,136 INFO L231 Difference]: Finished difference. Result has 44 places, 33 transitions, 162 flow [2024-10-11 14:24:56,136 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=162, PETRI_PLACES=44, PETRI_TRANSITIONS=33} [2024-10-11 14:24:56,137 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 18 predicate places. [2024-10-11 14:24:56,137 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 33 transitions, 162 flow [2024-10-11 14:24:56,137 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 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) [2024-10-11 14:24:56,137 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:24:56,137 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] [2024-10-11 14:24:56,154 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-11 14:24:56,341 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:24:56,342 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:24:56,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:24:56,343 INFO L85 PathProgramCache]: Analyzing trace with hash 857225227, now seen corresponding path program 1 times [2024-10-11 14:24:56,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:24:56,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819252252] [2024-10-11 14:24:56,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:24:56,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:24:56,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:24:56,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:24:56,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:24:56,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819252252] [2024-10-11 14:24:56,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819252252] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:24:56,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:24:56,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-11 14:24:56,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291257216] [2024-10-11 14:24:56,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:24:56,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 14:24:56,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:24:56,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 14:24:56,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-10-11 14:24:56,712 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:24:56,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 33 transitions, 162 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 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) [2024-10-11 14:24:56,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:24:56,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:24:56,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:24:56,919 INFO L124 PetriNetUnfolderBase]: 365/655 cut-off events. [2024-10-11 14:24:56,919 INFO L125 PetriNetUnfolderBase]: For 547/547 co-relation queries the response was YES. [2024-10-11 14:24:56,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1809 conditions, 655 events. 365/655 cut-off events. For 547/547 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2852 event pairs, 102 based on Foata normal form. 5/659 useless extension candidates. Maximal degree in co-relation 1778. Up to 536 conditions per place. [2024-10-11 14:24:56,923 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 40 selfloop transitions, 11 changer transitions 6/60 dead transitions. [2024-10-11 14:24:56,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 60 transitions, 361 flow [2024-10-11 14:24:56,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:24:56,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:24:56,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 87 transitions. [2024-10-11 14:24:56,925 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44387755102040816 [2024-10-11 14:24:56,925 INFO L175 Difference]: Start difference. First operand has 44 places, 33 transitions, 162 flow. Second operand 7 states and 87 transitions. [2024-10-11 14:24:56,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 60 transitions, 361 flow [2024-10-11 14:24:56,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 60 transitions, 341 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-10-11 14:24:56,927 INFO L231 Difference]: Finished difference. Result has 49 places, 40 transitions, 228 flow [2024-10-11 14:24:56,927 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=228, PETRI_PLACES=49, PETRI_TRANSITIONS=40} [2024-10-11 14:24:56,928 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 23 predicate places. [2024-10-11 14:24:56,928 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 40 transitions, 228 flow [2024-10-11 14:24:56,928 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 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) [2024-10-11 14:24:56,928 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:24:56,929 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] [2024-10-11 14:24:56,929 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-11 14:24:56,929 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:24:56,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:24:56,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1135586795, now seen corresponding path program 2 times [2024-10-11 14:24:56,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:24:56,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427731907] [2024-10-11 14:24:56,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:24:56,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:24:56,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:24:57,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:24:57,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:24:57,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427731907] [2024-10-11 14:24:57,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427731907] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:24:57,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:24:57,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-11 14:24:57,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653484419] [2024-10-11 14:24:57,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:24:57,342 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 14:24:57,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:24:57,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 14:24:57,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-10-11 14:24:57,343 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:24:57,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 40 transitions, 228 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 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) [2024-10-11 14:24:57,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:24:57,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:24:57,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:24:57,568 INFO L124 PetriNetUnfolderBase]: 363/652 cut-off events. [2024-10-11 14:24:57,568 INFO L125 PetriNetUnfolderBase]: For 691/691 co-relation queries the response was YES. [2024-10-11 14:24:57,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2055 conditions, 652 events. 363/652 cut-off events. For 691/691 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2882 event pairs, 75 based on Foata normal form. 5/657 useless extension candidates. Maximal degree in co-relation 2024. Up to 536 conditions per place. [2024-10-11 14:24:57,572 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 42 selfloop transitions, 10 changer transitions 10/65 dead transitions. [2024-10-11 14:24:57,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 65 transitions, 441 flow [2024-10-11 14:24:57,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:24:57,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:24:57,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 89 transitions. [2024-10-11 14:24:57,574 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45408163265306123 [2024-10-11 14:24:57,574 INFO L175 Difference]: Start difference. First operand has 49 places, 40 transitions, 228 flow. Second operand 7 states and 89 transitions. [2024-10-11 14:24:57,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 65 transitions, 441 flow [2024-10-11 14:24:57,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 65 transitions, 411 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-10-11 14:24:57,578 INFO L231 Difference]: Finished difference. Result has 52 places, 41 transitions, 243 flow [2024-10-11 14:24:57,578 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=243, PETRI_PLACES=52, PETRI_TRANSITIONS=41} [2024-10-11 14:24:57,578 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 26 predicate places. [2024-10-11 14:24:57,579 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 41 transitions, 243 flow [2024-10-11 14:24:57,579 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 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) [2024-10-11 14:24:57,579 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:24:57,579 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] [2024-10-11 14:24:57,579 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-11 14:24:57,579 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:24:57,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:24:57,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1909171475, now seen corresponding path program 1 times [2024-10-11 14:24:57,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:24:57,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484930271] [2024-10-11 14:24:57,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:24:57,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:24:57,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:24:57,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:24:57,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:24:57,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484930271] [2024-10-11 14:24:57,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484930271] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:24:57,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:24:57,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-11 14:24:57,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44993038] [2024-10-11 14:24:57,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:24:57,945 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 14:24:57,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:24:57,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 14:24:57,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-10-11 14:24:57,946 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:24:57,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 41 transitions, 243 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 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) [2024-10-11 14:24:57,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:24:57,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:24:57,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:24:58,143 INFO L124 PetriNetUnfolderBase]: 357/646 cut-off events. [2024-10-11 14:24:58,143 INFO L125 PetriNetUnfolderBase]: For 814/820 co-relation queries the response was YES. [2024-10-11 14:24:58,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2064 conditions, 646 events. 357/646 cut-off events. For 814/820 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2743 event pairs, 147 based on Foata normal form. 6/652 useless extension candidates. Maximal degree in co-relation 2033. Up to 536 conditions per place. [2024-10-11 14:24:58,148 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 37 selfloop transitions, 14 changer transitions 11/65 dead transitions. [2024-10-11 14:24:58,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 65 transitions, 481 flow [2024-10-11 14:24:58,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:24:58,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:24:58,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 86 transitions. [2024-10-11 14:24:58,150 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-10-11 14:24:58,150 INFO L175 Difference]: Start difference. First operand has 52 places, 41 transitions, 243 flow. Second operand 7 states and 86 transitions. [2024-10-11 14:24:58,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 65 transitions, 481 flow [2024-10-11 14:24:58,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 65 transitions, 443 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-10-11 14:24:58,155 INFO L231 Difference]: Finished difference. Result has 56 places, 45 transitions, 304 flow [2024-10-11 14:24:58,155 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=304, PETRI_PLACES=56, PETRI_TRANSITIONS=45} [2024-10-11 14:24:58,156 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 30 predicate places. [2024-10-11 14:24:58,156 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 45 transitions, 304 flow [2024-10-11 14:24:58,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 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) [2024-10-11 14:24:58,157 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:24:58,157 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] [2024-10-11 14:24:58,157 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-11 14:24:58,157 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:24:58,157 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:24:58,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1424687657, now seen corresponding path program 2 times [2024-10-11 14:24:58,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:24:58,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178632345] [2024-10-11 14:24:58,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:24:58,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:24:58,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:24:58,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:24:58,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:24:58,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178632345] [2024-10-11 14:24:58,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178632345] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:24:58,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545124195] [2024-10-11 14:24:58,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:24:58,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:24:58,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:24:58,530 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:24:58,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 14:24:58,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:24:58,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:24:58,607 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-11 14:24:58,610 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:24:58,803 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-11 14:24:58,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-10-11 14:24:58,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:24:58,815 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:24:58,921 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-10-11 14:24:58,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-10-11 14:24:58,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:24:58,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545124195] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:24:58,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:24:58,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 12 [2024-10-11 14:24:58,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031141663] [2024-10-11 14:24:58,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:24:58,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-11 14:24:58,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:24:58,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-11 14:24:58,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-10-11 14:24:58,972 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:24:58,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 45 transitions, 304 flow. Second operand has 13 states, 13 states have (on average 8.076923076923077) internal successors, (105), 13 states have internal predecessors, (105), 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) [2024-10-11 14:24:58,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:24:58,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:24:58,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:24:59,218 INFO L124 PetriNetUnfolderBase]: 369/668 cut-off events. [2024-10-11 14:24:59,219 INFO L125 PetriNetUnfolderBase]: For 918/918 co-relation queries the response was YES. [2024-10-11 14:24:59,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2201 conditions, 668 events. 369/668 cut-off events. For 918/918 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2890 event pairs, 45 based on Foata normal form. 14/682 useless extension candidates. Maximal degree in co-relation 2167. Up to 388 conditions per place. [2024-10-11 14:24:59,223 INFO L140 encePairwiseOnDemand]: 19/28 looper letters, 54 selfloop transitions, 16 changer transitions 3/76 dead transitions. [2024-10-11 14:24:59,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 76 transitions, 565 flow [2024-10-11 14:24:59,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 14:24:59,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 14:24:59,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 105 transitions. [2024-10-11 14:24:59,225 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-10-11 14:24:59,225 INFO L175 Difference]: Start difference. First operand has 56 places, 45 transitions, 304 flow. Second operand 8 states and 105 transitions. [2024-10-11 14:24:59,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 76 transitions, 565 flow [2024-10-11 14:24:59,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 76 transitions, 550 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-10-11 14:24:59,230 INFO L231 Difference]: Finished difference. Result has 60 places, 46 transitions, 333 flow [2024-10-11 14:24:59,230 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=333, PETRI_PLACES=60, PETRI_TRANSITIONS=46} [2024-10-11 14:24:59,231 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 34 predicate places. [2024-10-11 14:24:59,231 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 46 transitions, 333 flow [2024-10-11 14:24:59,231 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.076923076923077) internal successors, (105), 13 states have internal predecessors, (105), 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) [2024-10-11 14:24:59,231 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:24:59,231 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] [2024-10-11 14:24:59,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-11 14:24:59,435 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:24:59,436 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:24:59,436 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:24:59,436 INFO L85 PathProgramCache]: Analyzing trace with hash -98403989, now seen corresponding path program 3 times [2024-10-11 14:24:59,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:24:59,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454905995] [2024-10-11 14:24:59,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:24:59,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:24:59,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:24:59,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:24:59,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:24:59,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454905995] [2024-10-11 14:24:59,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454905995] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:24:59,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:24:59,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-11 14:24:59,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540234160] [2024-10-11 14:24:59,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:24:59,789 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 14:24:59,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:24:59,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 14:24:59,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-10-11 14:24:59,789 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:24:59,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 46 transitions, 333 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 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) [2024-10-11 14:24:59,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:24:59,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:24:59,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:25:00,015 INFO L124 PetriNetUnfolderBase]: 364/663 cut-off events. [2024-10-11 14:25:00,015 INFO L125 PetriNetUnfolderBase]: For 1324/1334 co-relation queries the response was YES. [2024-10-11 14:25:00,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2255 conditions, 663 events. 364/663 cut-off events. For 1324/1334 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2875 event pairs, 131 based on Foata normal form. 9/672 useless extension candidates. Maximal degree in co-relation 2220. Up to 565 conditions per place. [2024-10-11 14:25:00,020 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 34 selfloop transitions, 14 changer transitions 10/61 dead transitions. [2024-10-11 14:25:00,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 61 transitions, 498 flow [2024-10-11 14:25:00,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:25:00,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:25:00,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 83 transitions. [2024-10-11 14:25:00,022 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42346938775510207 [2024-10-11 14:25:00,022 INFO L175 Difference]: Start difference. First operand has 60 places, 46 transitions, 333 flow. Second operand 7 states and 83 transitions. [2024-10-11 14:25:00,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 61 transitions, 498 flow [2024-10-11 14:25:00,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 61 transitions, 448 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-10-11 14:25:00,028 INFO L231 Difference]: Finished difference. Result has 59 places, 45 transitions, 311 flow [2024-10-11 14:25:00,028 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=311, PETRI_PLACES=59, PETRI_TRANSITIONS=45} [2024-10-11 14:25:00,031 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 33 predicate places. [2024-10-11 14:25:00,031 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 45 transitions, 311 flow [2024-10-11 14:25:00,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 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) [2024-10-11 14:25:00,031 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:25:00,031 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] [2024-10-11 14:25:00,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-11 14:25:00,031 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:25:00,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:25:00,032 INFO L85 PathProgramCache]: Analyzing trace with hash 337700793, now seen corresponding path program 3 times [2024-10-11 14:25:00,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:25:00,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108878432] [2024-10-11 14:25:00,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:25:00,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:25:00,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:25:00,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:25:00,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:25:00,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108878432] [2024-10-11 14:25:00,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108878432] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:25:00,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:25:00,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-11 14:25:00,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762746399] [2024-10-11 14:25:00,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:25:00,435 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 14:25:00,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:25:00,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 14:25:00,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-10-11 14:25:00,436 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:25:00,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 45 transitions, 311 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 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) [2024-10-11 14:25:00,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:25:00,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:25:00,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:25:00,639 INFO L124 PetriNetUnfolderBase]: 340/613 cut-off events. [2024-10-11 14:25:00,640 INFO L125 PetriNetUnfolderBase]: For 862/862 co-relation queries the response was YES. [2024-10-11 14:25:00,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2029 conditions, 613 events. 340/613 cut-off events. For 862/862 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2535 event pairs, 134 based on Foata normal form. 4/617 useless extension candidates. Maximal degree in co-relation 1996. Up to 565 conditions per place. [2024-10-11 14:25:00,644 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 37 selfloop transitions, 12 changer transitions 3/55 dead transitions. [2024-10-11 14:25:00,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 55 transitions, 437 flow [2024-10-11 14:25:00,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:25:00,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:25:00,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 78 transitions. [2024-10-11 14:25:00,645 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-10-11 14:25:00,645 INFO L175 Difference]: Start difference. First operand has 59 places, 45 transitions, 311 flow. Second operand 7 states and 78 transitions. [2024-10-11 14:25:00,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 55 transitions, 437 flow [2024-10-11 14:25:00,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 55 transitions, 398 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-10-11 14:25:00,649 INFO L231 Difference]: Finished difference. Result has 57 places, 44 transitions, 286 flow [2024-10-11 14:25:00,649 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=286, PETRI_PLACES=57, PETRI_TRANSITIONS=44} [2024-10-11 14:25:00,650 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 31 predicate places. [2024-10-11 14:25:00,650 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 44 transitions, 286 flow [2024-10-11 14:25:00,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 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) [2024-10-11 14:25:00,651 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:25:00,651 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] [2024-10-11 14:25:00,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-11 14:25:00,651 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:25:00,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:25:00,652 INFO L85 PathProgramCache]: Analyzing trace with hash 779947237, now seen corresponding path program 4 times [2024-10-11 14:25:00,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:25:00,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309379457] [2024-10-11 14:25:00,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:25:00,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:25:00,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:25:00,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:25:00,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:25:00,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309379457] [2024-10-11 14:25:00,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309379457] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:25:00,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555604174] [2024-10-11 14:25:00,941 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 14:25:00,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:25:00,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:25:00,943 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:25:00,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 14:25:01,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 14:25:01,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:25:01,023 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-11 14:25:01,024 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:25:01,126 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:25:01,126 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 29 treesize of output 25 [2024-10-11 14:25:01,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:25:01,155 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:25:01,244 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-10-11 14:25:01,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-10-11 14:25:01,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:25:01,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555604174] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:25:01,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:25:01,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 5] total 14 [2024-10-11 14:25:01,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564424934] [2024-10-11 14:25:01,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:25:01,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-11 14:25:01,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:25:01,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-11 14:25:01,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-10-11 14:25:01,283 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:25:01,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 286 flow. Second operand has 15 states, 15 states have (on average 7.933333333333334) internal successors, (119), 15 states have internal predecessors, (119), 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) [2024-10-11 14:25:01,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:25:01,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:25:01,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:25:01,621 INFO L124 PetriNetUnfolderBase]: 424/758 cut-off events. [2024-10-11 14:25:01,621 INFO L125 PetriNetUnfolderBase]: For 1058/1058 co-relation queries the response was YES. [2024-10-11 14:25:01,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2490 conditions, 758 events. 424/758 cut-off events. For 1058/1058 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3358 event pairs, 102 based on Foata normal form. 21/779 useless extension candidates. Maximal degree in co-relation 2459. Up to 600 conditions per place. [2024-10-11 14:25:01,627 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 61 selfloop transitions, 21 changer transitions 0/85 dead transitions. [2024-10-11 14:25:01,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 85 transitions, 601 flow [2024-10-11 14:25:01,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-11 14:25:01,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-11 14:25:01,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 130 transitions. [2024-10-11 14:25:01,628 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42207792207792205 [2024-10-11 14:25:01,628 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 286 flow. Second operand 11 states and 130 transitions. [2024-10-11 14:25:01,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 85 transitions, 601 flow [2024-10-11 14:25:01,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 85 transitions, 577 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-10-11 14:25:01,634 INFO L231 Difference]: Finished difference. Result has 65 places, 53 transitions, 388 flow [2024-10-11 14:25:01,634 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=388, PETRI_PLACES=65, PETRI_TRANSITIONS=53} [2024-10-11 14:25:01,635 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 39 predicate places. [2024-10-11 14:25:01,635 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 53 transitions, 388 flow [2024-10-11 14:25:01,636 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 7.933333333333334) internal successors, (119), 15 states have internal predecessors, (119), 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) [2024-10-11 14:25:01,636 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:25:01,636 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] [2024-10-11 14:25:01,653 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-11 14:25:01,836 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-11 14:25:01,837 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:25:01,838 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:25:01,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1525908377, now seen corresponding path program 4 times [2024-10-11 14:25:01,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:25:01,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300270341] [2024-10-11 14:25:01,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:25:01,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:25:01,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:25:02,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:25:02,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:25:02,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300270341] [2024-10-11 14:25:02,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300270341] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:25:02,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:25:02,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-11 14:25:02,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142572259] [2024-10-11 14:25:02,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:25:02,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 14:25:02,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:25:02,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 14:25:02,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-10-11 14:25:02,147 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:25:02,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 53 transitions, 388 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 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) [2024-10-11 14:25:02,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:25:02,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:25:02,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:25:02,361 INFO L124 PetriNetUnfolderBase]: 442/788 cut-off events. [2024-10-11 14:25:02,361 INFO L125 PetriNetUnfolderBase]: For 1727/1727 co-relation queries the response was YES. [2024-10-11 14:25:02,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2877 conditions, 788 events. 442/788 cut-off events. For 1727/1727 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3514 event pairs, 151 based on Foata normal form. 12/800 useless extension candidates. Maximal degree in co-relation 2841. Up to 725 conditions per place. [2024-10-11 14:25:02,367 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 52 selfloop transitions, 13 changer transitions 0/68 dead transitions. [2024-10-11 14:25:02,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 68 transitions, 574 flow [2024-10-11 14:25:02,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:25:02,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:25:02,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 82 transitions. [2024-10-11 14:25:02,368 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-10-11 14:25:02,368 INFO L175 Difference]: Start difference. First operand has 65 places, 53 transitions, 388 flow. Second operand 7 states and 82 transitions. [2024-10-11 14:25:02,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 68 transitions, 574 flow [2024-10-11 14:25:02,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 68 transitions, 548 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-10-11 14:25:02,375 INFO L231 Difference]: Finished difference. Result has 67 places, 54 transitions, 402 flow [2024-10-11 14:25:02,375 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=402, PETRI_PLACES=67, PETRI_TRANSITIONS=54} [2024-10-11 14:25:02,376 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 41 predicate places. [2024-10-11 14:25:02,376 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 54 transitions, 402 flow [2024-10-11 14:25:02,376 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 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) [2024-10-11 14:25:02,376 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:25:02,376 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] [2024-10-11 14:25:02,378 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-11 14:25:02,378 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:25:02,378 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:25:02,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1300987723, now seen corresponding path program 5 times [2024-10-11 14:25:02,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:25:02,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601826675] [2024-10-11 14:25:02,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:25:02,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:25:02,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:25:02,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:25:02,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:25:02,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601826675] [2024-10-11 14:25:02,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601826675] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:25:02,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794200679] [2024-10-11 14:25:02,675 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 14:25:02,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:25:02,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:25:02,677 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:25:02,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 14:25:02,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:25:02,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:25:02,757 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-11 14:25:02,758 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:25:02,860 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:25:02,860 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 29 treesize of output 25 [2024-10-11 14:25:02,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:25:02,892 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:25:02,992 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-10-11 14:25:02,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-10-11 14:25:03,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:25:03,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794200679] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-11 14:25:03,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-11 14:25:03,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 6] total 14 [2024-10-11 14:25:03,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148946554] [2024-10-11 14:25:03,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:25:03,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 14:25:03,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:25:03,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 14:25:03,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-10-11 14:25:03,037 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:25:03,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 54 transitions, 402 flow. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 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) [2024-10-11 14:25:03,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:25:03,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:25:03,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:25:03,253 INFO L124 PetriNetUnfolderBase]: 421/768 cut-off events. [2024-10-11 14:25:03,253 INFO L125 PetriNetUnfolderBase]: For 1829/1835 co-relation queries the response was YES. [2024-10-11 14:25:03,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2796 conditions, 768 events. 421/768 cut-off events. For 1829/1835 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3489 event pairs, 105 based on Foata normal form. 27/795 useless extension candidates. Maximal degree in co-relation 2759. Up to 601 conditions per place. [2024-10-11 14:25:03,260 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 55 selfloop transitions, 13 changer transitions 0/71 dead transitions. [2024-10-11 14:25:03,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 71 transitions, 599 flow [2024-10-11 14:25:03,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:25:03,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:25:03,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 79 transitions. [2024-10-11 14:25:03,261 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-10-11 14:25:03,261 INFO L175 Difference]: Start difference. First operand has 67 places, 54 transitions, 402 flow. Second operand 6 states and 79 transitions. [2024-10-11 14:25:03,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 71 transitions, 599 flow [2024-10-11 14:25:03,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 71 transitions, 575 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-10-11 14:25:03,268 INFO L231 Difference]: Finished difference. Result has 68 places, 54 transitions, 410 flow [2024-10-11 14:25:03,268 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=410, PETRI_PLACES=68, PETRI_TRANSITIONS=54} [2024-10-11 14:25:03,268 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 42 predicate places. [2024-10-11 14:25:03,268 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 54 transitions, 410 flow [2024-10-11 14:25:03,269 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 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) [2024-10-11 14:25:03,269 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:25:03,269 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] [2024-10-11 14:25:03,286 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-11 14:25:03,473 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-11 14:25:03,474 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:25:03,474 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:25:03,474 INFO L85 PathProgramCache]: Analyzing trace with hash -413633599, now seen corresponding path program 5 times [2024-10-11 14:25:03,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:25:03,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129275331] [2024-10-11 14:25:03,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:25:03,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:25:03,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:25:03,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:25:03,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:25:03,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129275331] [2024-10-11 14:25:03,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129275331] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:25:03,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:25:03,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-11 14:25:03,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820853536] [2024-10-11 14:25:03,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:25:03,763 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 14:25:03,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:25:03,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 14:25:03,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-10-11 14:25:03,765 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:25:03,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 54 transitions, 410 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 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) [2024-10-11 14:25:03,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:25:03,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:25:03,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:25:03,962 INFO L124 PetriNetUnfolderBase]: 439/798 cut-off events. [2024-10-11 14:25:03,963 INFO L125 PetriNetUnfolderBase]: For 1994/2000 co-relation queries the response was YES. [2024-10-11 14:25:03,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2979 conditions, 798 events. 439/798 cut-off events. For 1994/2000 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3672 event pairs, 136 based on Foata normal form. 18/816 useless extension candidates. Maximal degree in co-relation 2941. Up to 734 conditions per place. [2024-10-11 14:25:03,970 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 50 selfloop transitions, 14 changer transitions 0/67 dead transitions. [2024-10-11 14:25:03,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 67 transitions, 593 flow [2024-10-11 14:25:03,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:25:03,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:25:03,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 80 transitions. [2024-10-11 14:25:03,971 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-10-11 14:25:03,971 INFO L175 Difference]: Start difference. First operand has 68 places, 54 transitions, 410 flow. Second operand 7 states and 80 transitions. [2024-10-11 14:25:03,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 67 transitions, 593 flow [2024-10-11 14:25:03,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 67 transitions, 571 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-11 14:25:03,979 INFO L231 Difference]: Finished difference. Result has 71 places, 55 transitions, 432 flow [2024-10-11 14:25:03,980 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=432, PETRI_PLACES=71, PETRI_TRANSITIONS=55} [2024-10-11 14:25:03,980 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 45 predicate places. [2024-10-11 14:25:03,980 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 55 transitions, 432 flow [2024-10-11 14:25:03,981 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 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) [2024-10-11 14:25:03,981 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:25:03,981 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] [2024-10-11 14:25:03,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-10-11 14:25:03,981 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:25:03,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:25:03,982 INFO L85 PathProgramCache]: Analyzing trace with hash -431005725, now seen corresponding path program 6 times [2024-10-11 14:25:03,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:25:03,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348412706] [2024-10-11 14:25:03,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:25:03,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:25:03,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:25:04,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:25:04,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:25:04,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348412706] [2024-10-11 14:25:04,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348412706] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:25:04,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:25:04,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-10-11 14:25:04,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969322948] [2024-10-11 14:25:04,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:25:04,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 14:25:04,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:25:04,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 14:25:04,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-10-11 14:25:04,271 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:25:04,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 55 transitions, 432 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 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) [2024-10-11 14:25:04,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:25:04,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:25:04,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:25:04,479 INFO L124 PetriNetUnfolderBase]: 396/704 cut-off events. [2024-10-11 14:25:04,479 INFO L125 PetriNetUnfolderBase]: For 2085/2091 co-relation queries the response was YES. [2024-10-11 14:25:04,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2765 conditions, 704 events. 396/704 cut-off events. For 2085/2091 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3057 event pairs, 115 based on Foata normal form. 10/714 useless extension candidates. Maximal degree in co-relation 2726. Up to 663 conditions per place. [2024-10-11 14:25:04,485 INFO L140 encePairwiseOnDemand]: 21/28 looper letters, 44 selfloop transitions, 11 changer transitions 3/61 dead transitions. [2024-10-11 14:25:04,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 61 transitions, 546 flow [2024-10-11 14:25:04,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:25:04,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:25:04,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 74 transitions. [2024-10-11 14:25:04,486 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-10-11 14:25:04,486 INFO L175 Difference]: Start difference. First operand has 71 places, 55 transitions, 432 flow. Second operand 7 states and 74 transitions. [2024-10-11 14:25:04,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 61 transitions, 546 flow [2024-10-11 14:25:04,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 61 transitions, 520 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-10-11 14:25:04,492 INFO L231 Difference]: Finished difference. Result has 72 places, 53 transitions, 406 flow [2024-10-11 14:25:04,493 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=406, PETRI_PLACES=72, PETRI_TRANSITIONS=53} [2024-10-11 14:25:04,493 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 46 predicate places. [2024-10-11 14:25:04,493 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 53 transitions, 406 flow [2024-10-11 14:25:04,494 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 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) [2024-10-11 14:25:04,494 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:25:04,494 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] [2024-10-11 14:25:04,494 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-10-11 14:25:04,494 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:25:04,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:25:04,494 INFO L85 PathProgramCache]: Analyzing trace with hash -2085142019, now seen corresponding path program 6 times [2024-10-11 14:25:04,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:25:04,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327373150] [2024-10-11 14:25:04,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:25:04,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:25:04,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:25:04,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:25:04,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:25:04,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327373150] [2024-10-11 14:25:04,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327373150] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:25:04,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461644589] [2024-10-11 14:25:04,750 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 14:25:04,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:25:04,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:25:04,752 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:25:04,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 14:25:04,834 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-10-11 14:25:04,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:25:04,836 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-11 14:25:04,837 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:25:04,950 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-11 14:25:04,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-10-11 14:25:04,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:25:04,960 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:25:05,040 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-10-11 14:25:05,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-10-11 14:25:05,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:25:05,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461644589] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:25:05,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:25:05,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 12 [2024-10-11 14:25:05,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689765252] [2024-10-11 14:25:05,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:25:05,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-11 14:25:05,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:25:05,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-11 14:25:05,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-10-11 14:25:05,078 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:25:05,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 53 transitions, 406 flow. Second operand has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 13 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:25:05,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:25:05,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:25:05,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:25:05,301 INFO L124 PetriNetUnfolderBase]: 352/620 cut-off events. [2024-10-11 14:25:05,301 INFO L125 PetriNetUnfolderBase]: For 1752/1758 co-relation queries the response was YES. [2024-10-11 14:25:05,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2473 conditions, 620 events. 352/620 cut-off events. For 1752/1758 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2539 event pairs, 80 based on Foata normal form. 18/638 useless extension candidates. Maximal degree in co-relation 2434. Up to 497 conditions per place. [2024-10-11 14:25:05,306 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 51 selfloop transitions, 15 changer transitions 0/69 dead transitions. [2024-10-11 14:25:05,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 69 transitions, 611 flow [2024-10-11 14:25:05,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 14:25:05,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 14:25:05,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 89 transitions. [2024-10-11 14:25:05,307 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39732142857142855 [2024-10-11 14:25:05,307 INFO L175 Difference]: Start difference. First operand has 72 places, 53 transitions, 406 flow. Second operand 8 states and 89 transitions. [2024-10-11 14:25:05,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 69 transitions, 611 flow [2024-10-11 14:25:05,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 69 transitions, 589 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-10-11 14:25:05,313 INFO L231 Difference]: Finished difference. Result has 73 places, 53 transitions, 418 flow [2024-10-11 14:25:05,313 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=418, PETRI_PLACES=73, PETRI_TRANSITIONS=53} [2024-10-11 14:25:05,313 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 47 predicate places. [2024-10-11 14:25:05,313 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 53 transitions, 418 flow [2024-10-11 14:25:05,314 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 13 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:25:05,314 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:25:05,314 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] [2024-10-11 14:25:05,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-11 14:25:05,517 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:25:05,518 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:25:05,518 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:25:05,518 INFO L85 PathProgramCache]: Analyzing trace with hash 2105778690, now seen corresponding path program 1 times [2024-10-11 14:25:05,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:25:05,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427107240] [2024-10-11 14:25:05,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:25:05,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:25:05,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:25:05,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:25:05,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:25:05,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427107240] [2024-10-11 14:25:05,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427107240] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:25:05,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178063552] [2024-10-11 14:25:05,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:25:05,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:25:05,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:25:05,603 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:25:05,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 14:25:05,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:25:05,676 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 14:25:05,677 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:25:05,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:25:05,734 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:25:05,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:25:05,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178063552] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:25:05,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:25:05,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 6 [2024-10-11 14:25:05,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195505863] [2024-10-11 14:25:05,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:25:05,763 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:25:05,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:25:05,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:25:05,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-10-11 14:25:05,764 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:25:05,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 53 transitions, 418 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 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) [2024-10-11 14:25:05,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:25:05,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:25:05,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:25:05,996 INFO L124 PetriNetUnfolderBase]: 758/1332 cut-off events. [2024-10-11 14:25:05,997 INFO L125 PetriNetUnfolderBase]: For 3857/3863 co-relation queries the response was YES. [2024-10-11 14:25:06,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4990 conditions, 1332 events. 758/1332 cut-off events. For 3857/3863 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6576 event pairs, 96 based on Foata normal form. 14/1346 useless extension candidates. Maximal degree in co-relation 4949. Up to 549 conditions per place. [2024-10-11 14:25:06,007 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 83 selfloop transitions, 20 changer transitions 2/108 dead transitions. [2024-10-11 14:25:06,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 108 transitions, 922 flow [2024-10-11 14:25:06,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:25:06,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:25:06,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-10-11 14:25:06,009 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5969387755102041 [2024-10-11 14:25:06,009 INFO L175 Difference]: Start difference. First operand has 73 places, 53 transitions, 418 flow. Second operand 7 states and 117 transitions. [2024-10-11 14:25:06,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 108 transitions, 922 flow [2024-10-11 14:25:06,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 108 transitions, 861 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-10-11 14:25:06,021 INFO L231 Difference]: Finished difference. Result has 74 places, 63 transitions, 512 flow [2024-10-11 14:25:06,021 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=512, PETRI_PLACES=74, PETRI_TRANSITIONS=63} [2024-10-11 14:25:06,022 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 48 predicate places. [2024-10-11 14:25:06,022 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 63 transitions, 512 flow [2024-10-11 14:25:06,022 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 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) [2024-10-11 14:25:06,022 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:25:06,022 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] [2024-10-11 14:25:06,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-11 14:25:06,223 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:25:06,223 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:25:06,224 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:25:06,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1525261836, now seen corresponding path program 2 times [2024-10-11 14:25:06,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:25:06,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506749529] [2024-10-11 14:25:06,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:25:06,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:25:06,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:25:06,303 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:25:06,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:25:06,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506749529] [2024-10-11 14:25:06,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506749529] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:25:06,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427992000] [2024-10-11 14:25:06,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:25:06,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:25:06,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:25:06,305 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:25:06,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-11 14:25:06,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:25:06,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:25:06,388 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 14:25:06,388 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:25:06,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:25:06,452 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:25:06,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:25:06,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427992000] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:25:06,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:25:06,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 6 [2024-10-11 14:25:06,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658476396] [2024-10-11 14:25:06,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:25:06,487 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:25:06,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:25:06,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:25:06,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-10-11 14:25:06,487 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:25:06,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 63 transitions, 512 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 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) [2024-10-11 14:25:06,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:25:06,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:25:06,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:25:06,828 INFO L124 PetriNetUnfolderBase]: 1190/2084 cut-off events. [2024-10-11 14:25:06,828 INFO L125 PetriNetUnfolderBase]: For 5846/5852 co-relation queries the response was YES. [2024-10-11 14:25:06,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7776 conditions, 2084 events. 1190/2084 cut-off events. For 5846/5852 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 11395 event pairs, 314 based on Foata normal form. 14/2097 useless extension candidates. Maximal degree in co-relation 7735. Up to 1335 conditions per place. [2024-10-11 14:25:06,846 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 94 selfloop transitions, 17 changer transitions 2/116 dead transitions. [2024-10-11 14:25:06,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 116 transitions, 1032 flow [2024-10-11 14:25:06,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:25:06,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:25:06,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-10-11 14:25:06,848 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-10-11 14:25:06,848 INFO L175 Difference]: Start difference. First operand has 74 places, 63 transitions, 512 flow. Second operand 7 states and 114 transitions. [2024-10-11 14:25:06,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 116 transitions, 1032 flow [2024-10-11 14:25:06,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 116 transitions, 1003 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-10-11 14:25:06,867 INFO L231 Difference]: Finished difference. Result has 82 places, 73 transitions, 628 flow [2024-10-11 14:25:06,867 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=483, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=628, PETRI_PLACES=82, PETRI_TRANSITIONS=73} [2024-10-11 14:25:06,868 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 56 predicate places. [2024-10-11 14:25:06,868 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 73 transitions, 628 flow [2024-10-11 14:25:06,868 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 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) [2024-10-11 14:25:06,868 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:25:06,868 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] [2024-10-11 14:25:06,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-11 14:25:07,072 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-10-11 14:25:07,073 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:25:07,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:25:07,073 INFO L85 PathProgramCache]: Analyzing trace with hash -930481090, now seen corresponding path program 3 times [2024-10-11 14:25:07,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:25:07,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329179892] [2024-10-11 14:25:07,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:25:07,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:25:07,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:25:07,153 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:25:07,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:25:07,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329179892] [2024-10-11 14:25:07,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329179892] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:25:07,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134626413] [2024-10-11 14:25:07,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:25:07,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:25:07,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:25:07,155 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:25:07,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-11 14:25:07,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-11 14:25:07,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:25:07,245 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-11 14:25:07,250 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:25:07,479 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:25:07,479 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:25:07,838 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:25:07,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134626413] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:25:07,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:25:07,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 11] total 25 [2024-10-11 14:25:07,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046985943] [2024-10-11 14:25:07,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:25:07,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-11 14:25:07,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:25:07,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-11 14:25:07,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2024-10-11 14:25:07,840 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:25:07,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 73 transitions, 628 flow. Second operand has 26 states, 26 states have (on average 7.538461538461538) internal successors, (196), 26 states have internal predecessors, (196), 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) [2024-10-11 14:25:07,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:25:07,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:25:07,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:25:09,530 INFO L124 PetriNetUnfolderBase]: 2343/4315 cut-off events. [2024-10-11 14:25:09,531 INFO L125 PetriNetUnfolderBase]: For 12610/12610 co-relation queries the response was YES. [2024-10-11 14:25:09,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16127 conditions, 4315 events. 2343/4315 cut-off events. For 12610/12610 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 28619 event pairs, 362 based on Foata normal form. 208/4519 useless extension candidates. Maximal degree in co-relation 14995. Up to 892 conditions per place. [2024-10-11 14:25:09,562 INFO L140 encePairwiseOnDemand]: 16/28 looper letters, 196 selfloop transitions, 93 changer transitions 95/387 dead transitions. [2024-10-11 14:25:09,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 387 transitions, 3398 flow [2024-10-11 14:25:09,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-10-11 14:25:09,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-10-11 14:25:09,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 516 transitions. [2024-10-11 14:25:09,566 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4607142857142857 [2024-10-11 14:25:09,566 INFO L175 Difference]: Start difference. First operand has 82 places, 73 transitions, 628 flow. Second operand 40 states and 516 transitions. [2024-10-11 14:25:09,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 387 transitions, 3398 flow [2024-10-11 14:25:09,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 387 transitions, 3279 flow, removed 47 selfloop flow, removed 1 redundant places. [2024-10-11 14:25:09,611 INFO L231 Difference]: Finished difference. Result has 146 places, 138 transitions, 1575 flow [2024-10-11 14:25:09,612 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=587, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=1575, PETRI_PLACES=146, PETRI_TRANSITIONS=138} [2024-10-11 14:25:09,612 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 120 predicate places. [2024-10-11 14:25:09,612 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 138 transitions, 1575 flow [2024-10-11 14:25:09,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 7.538461538461538) internal successors, (196), 26 states have internal predecessors, (196), 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) [2024-10-11 14:25:09,612 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:25:09,613 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] [2024-10-11 14:25:09,630 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-11 14:25:09,816 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:25:09,817 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:25:09,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:25:09,817 INFO L85 PathProgramCache]: Analyzing trace with hash 895194908, now seen corresponding path program 4 times [2024-10-11 14:25:09,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:25:09,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091094372] [2024-10-11 14:25:09,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:25:09,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:25:09,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:25:09,906 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:25:09,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:25:09,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091094372] [2024-10-11 14:25:09,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091094372] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:25:09,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080221118] [2024-10-11 14:25:09,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 14:25:09,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:25:09,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:25:09,909 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:25:09,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-11 14:25:09,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 14:25:09,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:25:09,983 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 14:25:09,984 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:25:10,151 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:25:10,151 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 14:25:10,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080221118] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:25:10,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 14:25:10,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 13 [2024-10-11 14:25:10,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609984175] [2024-10-11 14:25:10,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:25:10,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 14:25:10,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:25:10,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 14:25:10,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-10-11 14:25:10,153 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:25:10,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 138 transitions, 1575 flow. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 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) [2024-10-11 14:25:10,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:25:10,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:25:10,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:25:10,849 INFO L124 PetriNetUnfolderBase]: 2227/4153 cut-off events. [2024-10-11 14:25:10,849 INFO L125 PetriNetUnfolderBase]: For 29767/29767 co-relation queries the response was YES. [2024-10-11 14:25:10,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19404 conditions, 4153 events. 2227/4153 cut-off events. For 29767/29767 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 28550 event pairs, 319 based on Foata normal form. 4/4157 useless extension candidates. Maximal degree in co-relation 18216. Up to 1710 conditions per place. [2024-10-11 14:25:10,885 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 151 selfloop transitions, 77 changer transitions 11/242 dead transitions. [2024-10-11 14:25:10,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 242 transitions, 3086 flow [2024-10-11 14:25:10,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 14:25:10,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-11 14:25:10,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 120 transitions. [2024-10-11 14:25:10,887 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-10-11 14:25:10,887 INFO L175 Difference]: Start difference. First operand has 146 places, 138 transitions, 1575 flow. Second operand 10 states and 120 transitions. [2024-10-11 14:25:10,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 242 transitions, 3086 flow [2024-10-11 14:25:11,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 242 transitions, 2830 flow, removed 106 selfloop flow, removed 14 redundant places. [2024-10-11 14:25:11,073 INFO L231 Difference]: Finished difference. Result has 137 places, 158 transitions, 1861 flow [2024-10-11 14:25:11,073 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1392, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1861, PETRI_PLACES=137, PETRI_TRANSITIONS=158} [2024-10-11 14:25:11,073 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 111 predicate places. [2024-10-11 14:25:11,073 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 158 transitions, 1861 flow [2024-10-11 14:25:11,074 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 8 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) [2024-10-11 14:25:11,074 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:25:11,074 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] [2024-10-11 14:25:11,090 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-11 14:25:11,274 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-10-11 14:25:11,274 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:25:11,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:25:11,275 INFO L85 PathProgramCache]: Analyzing trace with hash 739656916, now seen corresponding path program 5 times [2024-10-11 14:25:11,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:25:11,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50125342] [2024-10-11 14:25:11,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:25:11,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:25:11,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:25:11,362 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:25:11,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:25:11,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50125342] [2024-10-11 14:25:11,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50125342] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:25:11,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837902554] [2024-10-11 14:25:11,362 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 14:25:11,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:25:11,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:25:11,364 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:25:11,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-11 14:25:11,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-11 14:25:11,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:25:11,450 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-11 14:25:11,451 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:25:11,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:25:11,534 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:25:11,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:25:11,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837902554] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:25:11,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:25:11,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-10-11 14:25:11,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150043624] [2024-10-11 14:25:11,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:25:11,600 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-11 14:25:11,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:25:11,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-11 14:25:11,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2024-10-11 14:25:11,601 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:25:11,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 158 transitions, 1861 flow. Second operand has 13 states, 13 states have (on average 8.692307692307692) internal successors, (113), 13 states have internal predecessors, (113), 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) [2024-10-11 14:25:11,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:25:11,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:25:11,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:25:12,031 INFO L124 PetriNetUnfolderBase]: 1905/3520 cut-off events. [2024-10-11 14:25:12,031 INFO L125 PetriNetUnfolderBase]: For 22919/22919 co-relation queries the response was YES. [2024-10-11 14:25:12,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16856 conditions, 3520 events. 1905/3520 cut-off events. For 22919/22919 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 23091 event pairs, 1411 based on Foata normal form. 15/3535 useless extension candidates. Maximal degree in co-relation 16522. Up to 3356 conditions per place. [2024-10-11 14:25:12,059 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 132 selfloop transitions, 3 changer transitions 28/166 dead transitions. [2024-10-11 14:25:12,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 166 transitions, 2174 flow [2024-10-11 14:25:12,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 14:25:12,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 14:25:12,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 79 transitions. [2024-10-11 14:25:12,061 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4030612244897959 [2024-10-11 14:25:12,061 INFO L175 Difference]: Start difference. First operand has 137 places, 158 transitions, 1861 flow. Second operand 7 states and 79 transitions. [2024-10-11 14:25:12,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 166 transitions, 2174 flow [2024-10-11 14:25:12,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 166 transitions, 1997 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-10-11 14:25:12,216 INFO L231 Difference]: Finished difference. Result has 135 places, 138 transitions, 1457 flow [2024-10-11 14:25:12,216 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1568, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1457, PETRI_PLACES=135, PETRI_TRANSITIONS=138} [2024-10-11 14:25:12,217 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 109 predicate places. [2024-10-11 14:25:12,217 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 138 transitions, 1457 flow [2024-10-11 14:25:12,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.692307692307692) internal successors, (113), 13 states have internal predecessors, (113), 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) [2024-10-11 14:25:12,218 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:25:12,218 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] [2024-10-11 14:25:12,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-11 14:25:12,418 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-10-11 14:25:12,419 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:25:12,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:25:12,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1465117270, now seen corresponding path program 6 times [2024-10-11 14:25:12,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:25:12,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951135165] [2024-10-11 14:25:12,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:25:12,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:25:12,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:25:12,542 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:25:12,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:25:12,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951135165] [2024-10-11 14:25:12,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951135165] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:25:12,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884982202] [2024-10-11 14:25:12,543 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 14:25:12,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:25:12,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:25:12,545 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:25:12,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-11 14:25:12,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-11 14:25:12,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:25:12,640 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-11 14:25:12,641 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:25:12,728 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:25:12,729 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:25:12,793 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:25:12,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884982202] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:25:12,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:25:12,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-10-11 14:25:12,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517358124] [2024-10-11 14:25:12,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:25:12,794 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-11 14:25:12,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:25:12,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-11 14:25:12,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2024-10-11 14:25:12,795 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:25:12,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 138 transitions, 1457 flow. Second operand has 15 states, 15 states have (on average 8.133333333333333) internal successors, (122), 15 states have internal predecessors, (122), 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) [2024-10-11 14:25:12,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:25:12,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:25:12,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:25:13,357 INFO L124 PetriNetUnfolderBase]: 1748/3204 cut-off events. [2024-10-11 14:25:13,357 INFO L125 PetriNetUnfolderBase]: For 18874/18874 co-relation queries the response was YES. [2024-10-11 14:25:13,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14578 conditions, 3204 events. 1748/3204 cut-off events. For 18874/18874 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 20408 event pairs, 711 based on Foata normal form. 10/3214 useless extension candidates. Maximal degree in co-relation 14522. Up to 2813 conditions per place. [2024-10-11 14:25:13,376 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 115 selfloop transitions, 16 changer transitions 27/161 dead transitions. [2024-10-11 14:25:13,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 161 transitions, 1897 flow [2024-10-11 14:25:13,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 14:25:13,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 14:25:13,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 93 transitions. [2024-10-11 14:25:13,377 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41517857142857145 [2024-10-11 14:25:13,377 INFO L175 Difference]: Start difference. First operand has 135 places, 138 transitions, 1457 flow. Second operand 8 states and 93 transitions. [2024-10-11 14:25:13,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 161 transitions, 1897 flow [2024-10-11 14:25:13,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 161 transitions, 1873 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-10-11 14:25:13,442 INFO L231 Difference]: Finished difference. Result has 126 places, 125 transitions, 1304 flow [2024-10-11 14:25:13,442 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1399, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1304, PETRI_PLACES=126, PETRI_TRANSITIONS=125} [2024-10-11 14:25:13,442 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 100 predicate places. [2024-10-11 14:25:13,442 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 125 transitions, 1304 flow [2024-10-11 14:25:13,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.133333333333333) internal successors, (122), 15 states have internal predecessors, (122), 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) [2024-10-11 14:25:13,443 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:25:13,443 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] [2024-10-11 14:25:13,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-11 14:25:13,643 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-10-11 14:25:13,643 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:25:13,644 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:25:13,644 INFO L85 PathProgramCache]: Analyzing trace with hash 278839278, now seen corresponding path program 7 times [2024-10-11 14:25:13,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:25:13,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845988245] [2024-10-11 14:25:13,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:25:13,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:25:13,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:25:13,791 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:25:13,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:25:13,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845988245] [2024-10-11 14:25:13,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845988245] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:25:13,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135993583] [2024-10-11 14:25:13,792 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-11 14:25:13,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:25:13,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:25:13,793 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:25:13,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-11 14:25:13,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:25:13,883 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-11 14:25:13,885 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:25:14,085 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:25:14,085 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:25:14,254 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:25:14,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135993583] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:25:14,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:25:14,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-10-11 14:25:14,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102888189] [2024-10-11 14:25:14,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:25:14,255 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-11 14:25:14,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:25:14,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-11 14:25:14,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2024-10-11 14:25:14,256 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:25:14,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 125 transitions, 1304 flow. Second operand has 22 states, 22 states have (on average 7.681818181818182) internal successors, (169), 22 states have internal predecessors, (169), 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) [2024-10-11 14:25:14,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:25:14,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:25:14,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:25:14,743 INFO L124 PetriNetUnfolderBase]: 1729/3139 cut-off events. [2024-10-11 14:25:14,743 INFO L125 PetriNetUnfolderBase]: For 18520/18524 co-relation queries the response was YES. [2024-10-11 14:25:14,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14364 conditions, 3139 events. 1729/3139 cut-off events. For 18520/18524 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 19713 event pairs, 388 based on Foata normal form. 79/3218 useless extension candidates. Maximal degree in co-relation 14302. Up to 1182 conditions per place. [2024-10-11 14:25:14,763 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 116 selfloop transitions, 45 changer transitions 0/164 dead transitions. [2024-10-11 14:25:14,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 164 transitions, 1993 flow [2024-10-11 14:25:14,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-11 14:25:14,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-11 14:25:14,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 114 transitions. [2024-10-11 14:25:14,765 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37012987012987014 [2024-10-11 14:25:14,765 INFO L175 Difference]: Start difference. First operand has 126 places, 125 transitions, 1304 flow. Second operand 11 states and 114 transitions. [2024-10-11 14:25:14,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 164 transitions, 1993 flow [2024-10-11 14:25:14,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 164 transitions, 1942 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-10-11 14:25:14,828 INFO L231 Difference]: Finished difference. Result has 128 places, 122 transitions, 1358 flow [2024-10-11 14:25:14,828 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1171, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1358, PETRI_PLACES=128, PETRI_TRANSITIONS=122} [2024-10-11 14:25:14,828 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 102 predicate places. [2024-10-11 14:25:14,829 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 122 transitions, 1358 flow [2024-10-11 14:25:14,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.681818181818182) internal successors, (169), 22 states have internal predecessors, (169), 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) [2024-10-11 14:25:14,829 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:25:14,829 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] [2024-10-11 14:25:14,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-11 14:25:15,033 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,14 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:25:15,034 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:25:15,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:25:15,034 INFO L85 PathProgramCache]: Analyzing trace with hash -32640620, now seen corresponding path program 8 times [2024-10-11 14:25:15,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:25:15,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133286733] [2024-10-11 14:25:15,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:25:15,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:25:15,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:25:15,180 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:25:15,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:25:15,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133286733] [2024-10-11 14:25:15,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133286733] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:25:15,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246562853] [2024-10-11 14:25:15,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:25:15,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:25:15,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:25:15,183 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:25:15,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-11 14:25:15,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:25:15,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:25:15,272 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-11 14:25:15,275 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:25:15,442 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:25:15,442 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:25:15,583 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:25:15,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246562853] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:25:15,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:25:15,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-10-11 14:25:15,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250685562] [2024-10-11 14:25:15,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:25:15,584 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-11 14:25:15,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:25:15,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-11 14:25:15,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2024-10-11 14:25:15,585 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:25:15,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 122 transitions, 1358 flow. Second operand has 22 states, 22 states have (on average 7.181818181818182) internal successors, (158), 22 states have internal predecessors, (158), 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) [2024-10-11 14:25:15,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:25:15,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:25:15,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:25:16,022 INFO L124 PetriNetUnfolderBase]: 1950/3544 cut-off events. [2024-10-11 14:25:16,022 INFO L125 PetriNetUnfolderBase]: For 23116/23120 co-relation queries the response was YES. [2024-10-11 14:25:16,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17038 conditions, 3544 events. 1950/3544 cut-off events. For 23116/23120 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 22384 event pairs, 592 based on Foata normal form. 66/3610 useless extension candidates. Maximal degree in co-relation 16974. Up to 1236 conditions per place. [2024-10-11 14:25:16,046 INFO L140 encePairwiseOnDemand]: 20/28 looper letters, 124 selfloop transitions, 53 changer transitions 0/180 dead transitions. [2024-10-11 14:25:16,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 180 transitions, 2303 flow [2024-10-11 14:25:16,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-11 14:25:16,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-11 14:25:16,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 119 transitions. [2024-10-11 14:25:16,047 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-10-11 14:25:16,047 INFO L175 Difference]: Start difference. First operand has 128 places, 122 transitions, 1358 flow. Second operand 11 states and 119 transitions. [2024-10-11 14:25:16,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 180 transitions, 2303 flow [2024-10-11 14:25:16,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 180 transitions, 2240 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-10-11 14:25:16,120 INFO L231 Difference]: Finished difference. Result has 131 places, 131 transitions, 1619 flow [2024-10-11 14:25:16,121 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1295, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1619, PETRI_PLACES=131, PETRI_TRANSITIONS=131} [2024-10-11 14:25:16,121 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 105 predicate places. [2024-10-11 14:25:16,121 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 131 transitions, 1619 flow [2024-10-11 14:25:16,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.181818181818182) internal successors, (158), 22 states have internal predecessors, (158), 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) [2024-10-11 14:25:16,123 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:25:16,123 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:25:16,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-10-11 14:25:16,327 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-10-11 14:25:16,328 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:25:16,328 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:25:16,328 INFO L85 PathProgramCache]: Analyzing trace with hash 555207431, now seen corresponding path program 1 times [2024-10-11 14:25:16,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:25:16,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709849297] [2024-10-11 14:25:16,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:25:16,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:25:16,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:25:16,952 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:25:16,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:25:16,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709849297] [2024-10-11 14:25:16,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709849297] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:25:16,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251683212] [2024-10-11 14:25:16,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:25:16,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:25:16,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:25:16,955 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:25:16,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-11 14:25:17,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:25:17,049 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-11 14:25:17,050 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:25:17,167 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-10-11 14:25:17,167 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 35 treesize of output 20 [2024-10-11 14:25:17,169 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:25:17,170 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:25:17,275 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-10-11 14:25:17,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-10-11 14:25:17,330 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:25:17,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251683212] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:25:17,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:25:17,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 20 [2024-10-11 14:25:17,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750389191] [2024-10-11 14:25:17,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:25:17,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-11 14:25:17,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:25:17,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-11 14:25:17,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2024-10-11 14:25:17,332 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:25:17,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 131 transitions, 1619 flow. Second operand has 21 states, 21 states have (on average 7.761904761904762) internal successors, (163), 21 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) [2024-10-11 14:25:17,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:25:17,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:25:17,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:25:18,095 INFO L124 PetriNetUnfolderBase]: 1990/3637 cut-off events. [2024-10-11 14:25:18,096 INFO L125 PetriNetUnfolderBase]: For 24313/24317 co-relation queries the response was YES. [2024-10-11 14:25:18,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17821 conditions, 3637 events. 1990/3637 cut-off events. For 24313/24317 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 23265 event pairs, 673 based on Foata normal form. 14/3651 useless extension candidates. Maximal degree in co-relation 17755. Up to 2583 conditions per place. [2024-10-11 14:25:18,114 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 141 selfloop transitions, 42 changer transitions 34/220 dead transitions. [2024-10-11 14:25:18,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 220 transitions, 2724 flow [2024-10-11 14:25:18,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-11 14:25:18,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-11 14:25:18,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 204 transitions. [2024-10-11 14:25:18,115 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-10-11 14:25:18,115 INFO L175 Difference]: Start difference. First operand has 131 places, 131 transitions, 1619 flow. Second operand 17 states and 204 transitions. [2024-10-11 14:25:18,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 220 transitions, 2724 flow [2024-10-11 14:25:18,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 220 transitions, 2692 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-10-11 14:25:18,169 INFO L231 Difference]: Finished difference. Result has 147 places, 136 transitions, 1792 flow [2024-10-11 14:25:18,169 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1589, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1792, PETRI_PLACES=147, PETRI_TRANSITIONS=136} [2024-10-11 14:25:18,170 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 121 predicate places. [2024-10-11 14:25:18,170 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 136 transitions, 1792 flow [2024-10-11 14:25:18,170 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.761904761904762) internal successors, (163), 21 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) [2024-10-11 14:25:18,170 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:25:18,170 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:25:18,183 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-11 14:25:18,374 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-10-11 14:25:18,374 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:25:18,375 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:25:18,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1808304955, now seen corresponding path program 1 times [2024-10-11 14:25:18,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:25:18,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241700460] [2024-10-11 14:25:18,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:25:18,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:25:18,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:25:18,749 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:25:18,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:25:18,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241700460] [2024-10-11 14:25:18,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241700460] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:25:18,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407530395] [2024-10-11 14:25:18,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:25:18,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:25:18,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:25:18,752 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:25:18,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-11 14:25:18,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:25:18,848 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-11 14:25:18,849 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:25:18,977 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-10-11 14:25:18,977 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 34 treesize of output 10 [2024-10-11 14:25:18,979 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:25:18,979 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:25:19,065 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-10-11 14:25:19,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-10-11 14:25:19,107 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:25:19,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407530395] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:25:19,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:25:19,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 20 [2024-10-11 14:25:19,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630709558] [2024-10-11 14:25:19,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:25:19,108 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-11 14:25:19,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:25:19,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-11 14:25:19,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2024-10-11 14:25:19,109 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:25:19,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 136 transitions, 1792 flow. Second operand has 21 states, 21 states have (on average 7.857142857142857) internal successors, (165), 21 states have internal predecessors, (165), 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) [2024-10-11 14:25:19,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:25:19,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:25:19,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:25:20,134 INFO L124 PetriNetUnfolderBase]: 2282/4156 cut-off events. [2024-10-11 14:25:20,134 INFO L125 PetriNetUnfolderBase]: For 35223/35227 co-relation queries the response was YES. [2024-10-11 14:25:20,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21879 conditions, 4156 events. 2282/4156 cut-off events. For 35223/35227 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 27106 event pairs, 553 based on Foata normal form. 46/4202 useless extension candidates. Maximal degree in co-relation 21805. Up to 2361 conditions per place. [2024-10-11 14:25:20,167 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 186 selfloop transitions, 58 changer transitions 1/248 dead transitions. [2024-10-11 14:25:20,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 248 transitions, 3410 flow [2024-10-11 14:25:20,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-11 14:25:20,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-10-11 14:25:20,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 229 transitions. [2024-10-11 14:25:20,169 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45436507936507936 [2024-10-11 14:25:20,169 INFO L175 Difference]: Start difference. First operand has 147 places, 136 transitions, 1792 flow. Second operand 18 states and 229 transitions. [2024-10-11 14:25:20,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 248 transitions, 3410 flow [2024-10-11 14:25:20,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 248 transitions, 3280 flow, removed 24 selfloop flow, removed 14 redundant places. [2024-10-11 14:25:20,264 INFO L231 Difference]: Finished difference. Result has 149 places, 146 transitions, 1973 flow [2024-10-11 14:25:20,264 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1680, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1973, PETRI_PLACES=149, PETRI_TRANSITIONS=146} [2024-10-11 14:25:20,265 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 123 predicate places. [2024-10-11 14:25:20,265 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 146 transitions, 1973 flow [2024-10-11 14:25:20,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.857142857142857) internal successors, (165), 21 states have internal predecessors, (165), 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) [2024-10-11 14:25:20,265 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:25:20,265 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:25:20,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-10-11 14:25:20,466 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-10-11 14:25:20,466 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:25:20,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:25:20,467 INFO L85 PathProgramCache]: Analyzing trace with hash 2104518837, now seen corresponding path program 2 times [2024-10-11 14:25:20,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:25:20,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865007030] [2024-10-11 14:25:20,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:25:20,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:25:20,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:25:20,920 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:25:20,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:25:20,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865007030] [2024-10-11 14:25:20,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865007030] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:25:20,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583277152] [2024-10-11 14:25:20,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:25:20,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:25:20,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:25:20,923 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:25:20,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-11 14:25:21,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:25:21,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:25:21,022 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-11 14:25:21,023 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:25:21,234 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:25:21,234 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 29 treesize of output 21 [2024-10-11 14:25:21,245 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:25:21,245 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:25:21,373 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-10-11 14:25:21,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-10-11 14:25:21,427 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:25:21,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583277152] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:25:21,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:25:21,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7] total 21 [2024-10-11 14:25:21,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364148967] [2024-10-11 14:25:21,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:25:21,429 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-11 14:25:21,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:25:21,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-11 14:25:21,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2024-10-11 14:25:21,430 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:25:21,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 146 transitions, 1973 flow. Second operand has 22 states, 22 states have (on average 7.5) internal successors, (165), 22 states have internal predecessors, (165), 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) [2024-10-11 14:25:21,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:25:21,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:25:21,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:25:22,609 INFO L124 PetriNetUnfolderBase]: 2661/4848 cut-off events. [2024-10-11 14:25:22,609 INFO L125 PetriNetUnfolderBase]: For 44528/44528 co-relation queries the response was YES. [2024-10-11 14:25:22,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26004 conditions, 4848 events. 2661/4848 cut-off events. For 44528/44528 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 32637 event pairs, 819 based on Foata normal form. 30/4878 useless extension candidates. Maximal degree in co-relation 25931. Up to 3267 conditions per place. [2024-10-11 14:25:22,640 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 176 selfloop transitions, 82 changer transitions 8/269 dead transitions. [2024-10-11 14:25:22,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 269 transitions, 3651 flow [2024-10-11 14:25:22,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-11 14:25:22,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-10-11 14:25:22,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 256 transitions. [2024-10-11 14:25:22,642 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-10-11 14:25:22,642 INFO L175 Difference]: Start difference. First operand has 149 places, 146 transitions, 1973 flow. Second operand 21 states and 256 transitions. [2024-10-11 14:25:22,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 269 transitions, 3651 flow [2024-10-11 14:25:22,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 269 transitions, 3535 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-10-11 14:25:22,750 INFO L231 Difference]: Finished difference. Result has 166 places, 179 transitions, 2669 flow [2024-10-11 14:25:22,750 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1870, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2669, PETRI_PLACES=166, PETRI_TRANSITIONS=179} [2024-10-11 14:25:22,750 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 140 predicate places. [2024-10-11 14:25:22,751 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 179 transitions, 2669 flow [2024-10-11 14:25:22,751 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.5) internal successors, (165), 22 states have internal predecessors, (165), 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) [2024-10-11 14:25:22,751 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:25:22,751 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:25:22,766 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-10-11 14:25:22,951 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:25:22,952 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:25:22,952 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:25:22,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1741214893, now seen corresponding path program 3 times [2024-10-11 14:25:22,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:25:22,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594230528] [2024-10-11 14:25:22,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:25:22,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:25:22,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:25:23,316 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:25:23,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:25:23,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594230528] [2024-10-11 14:25:23,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594230528] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:25:23,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797902935] [2024-10-11 14:25:23,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:25:23,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:25:23,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:25:23,319 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:25:23,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-11 14:25:23,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-11 14:25:23,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:25:23,425 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-10-11 14:25:23,426 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:25:23,654 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:25:23,654 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 29 treesize of output 21 [2024-10-11 14:25:23,661 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:25:23,661 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:25:23,769 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-10-11 14:25:23,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-10-11 14:25:23,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:25:23,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797902935] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:25:23,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:25:23,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 7] total 22 [2024-10-11 14:25:23,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848827066] [2024-10-11 14:25:23,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:25:23,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-11 14:25:23,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:25:23,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-11 14:25:23,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2024-10-11 14:25:23,813 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:25:23,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 179 transitions, 2669 flow. Second operand has 23 states, 23 states have (on average 7.434782608695652) internal successors, (171), 23 states have internal predecessors, (171), 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) [2024-10-11 14:25:23,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:25:23,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:25:23,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:25:24,770 INFO L124 PetriNetUnfolderBase]: 2517/4602 cut-off events. [2024-10-11 14:25:24,770 INFO L125 PetriNetUnfolderBase]: For 64840/64840 co-relation queries the response was YES. [2024-10-11 14:25:24,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27636 conditions, 4602 events. 2517/4602 cut-off events. For 64840/64840 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 30847 event pairs, 783 based on Foata normal form. 48/4650 useless extension candidates. Maximal degree in co-relation 27554. Up to 3267 conditions per place. [2024-10-11 14:25:24,804 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 163 selfloop transitions, 78 changer transitions 2/246 dead transitions. [2024-10-11 14:25:24,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 246 transitions, 3641 flow [2024-10-11 14:25:24,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-11 14:25:24,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-10-11 14:25:24,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 216 transitions. [2024-10-11 14:25:24,806 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-10-11 14:25:24,806 INFO L175 Difference]: Start difference. First operand has 166 places, 179 transitions, 2669 flow. Second operand 18 states and 216 transitions. [2024-10-11 14:25:24,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 246 transitions, 3641 flow [2024-10-11 14:25:24,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 246 transitions, 3426 flow, removed 76 selfloop flow, removed 12 redundant places. [2024-10-11 14:25:24,953 INFO L231 Difference]: Finished difference. Result has 170 places, 176 transitions, 2592 flow [2024-10-11 14:25:24,953 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2418, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2592, PETRI_PLACES=170, PETRI_TRANSITIONS=176} [2024-10-11 14:25:24,954 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 144 predicate places. [2024-10-11 14:25:24,954 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 176 transitions, 2592 flow [2024-10-11 14:25:24,954 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.434782608695652) internal successors, (171), 23 states have internal predecessors, (171), 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) [2024-10-11 14:25:24,954 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:25:24,954 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:25:24,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-10-11 14:25:25,154 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-10-11 14:25:25,155 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:25:25,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:25:25,155 INFO L85 PathProgramCache]: Analyzing trace with hash -508949035, now seen corresponding path program 4 times [2024-10-11 14:25:25,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:25:25,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998238205] [2024-10-11 14:25:25,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:25:25,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:25:25,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:25:25,511 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:25:25,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:25:25,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998238205] [2024-10-11 14:25:25,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998238205] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:25:25,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966961246] [2024-10-11 14:25:25,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 14:25:25,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:25:25,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:25:25,514 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:25:25,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-11 14:25:25,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 14:25:25,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:25:25,627 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-10-11 14:25:25,628 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:25:25,678 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 19 treesize of output 1 [2024-10-11 14:25:25,809 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-10-11 14:25:25,810 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 31 treesize of output 20 [2024-10-11 14:25:25,811 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:25:25,811 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:25:26,033 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:25:26,033 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 168 treesize of output 164 [2024-10-11 14:25:26,047 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-11 14:25:26,048 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 50 treesize of output 39 [2024-10-11 14:25:26,133 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-10-11 14:25:26,133 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 195 treesize of output 190 [2024-10-11 14:25:26,359 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:25:26,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966961246] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:25:26,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:25:26,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 25 [2024-10-11 14:25:26,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537462551] [2024-10-11 14:25:26,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:25:26,360 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-11 14:25:26,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:25:26,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-11 14:25:26,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2024-10-11 14:25:26,361 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:25:26,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 176 transitions, 2592 flow. Second operand has 26 states, 26 states have (on average 7.384615384615385) internal successors, (192), 26 states have internal predecessors, (192), 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) [2024-10-11 14:25:26,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:25:26,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:25:26,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:25:27,629 INFO L124 PetriNetUnfolderBase]: 2515/4588 cut-off events. [2024-10-11 14:25:27,629 INFO L125 PetriNetUnfolderBase]: For 58767/58767 co-relation queries the response was YES. [2024-10-11 14:25:27,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26942 conditions, 4588 events. 2515/4588 cut-off events. For 58767/58767 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 30656 event pairs, 950 based on Foata normal form. 15/4603 useless extension candidates. Maximal degree in co-relation 26860. Up to 4099 conditions per place. [2024-10-11 14:25:27,661 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 181 selfloop transitions, 46 changer transitions 31/261 dead transitions. [2024-10-11 14:25:27,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 261 transitions, 3745 flow [2024-10-11 14:25:27,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-11 14:25:27,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-10-11 14:25:27,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 241 transitions. [2024-10-11 14:25:27,663 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4098639455782313 [2024-10-11 14:25:27,663 INFO L175 Difference]: Start difference. First operand has 170 places, 176 transitions, 2592 flow. Second operand 21 states and 241 transitions. [2024-10-11 14:25:27,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 261 transitions, 3745 flow [2024-10-11 14:25:27,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 261 transitions, 3548 flow, removed 3 selfloop flow, removed 18 redundant places. [2024-10-11 14:25:27,774 INFO L231 Difference]: Finished difference. Result has 181 places, 182 transitions, 2703 flow [2024-10-11 14:25:27,775 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2429, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2703, PETRI_PLACES=181, PETRI_TRANSITIONS=182} [2024-10-11 14:25:27,775 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 155 predicate places. [2024-10-11 14:25:27,775 INFO L471 AbstractCegarLoop]: Abstraction has has 181 places, 182 transitions, 2703 flow [2024-10-11 14:25:27,775 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 7.384615384615385) internal successors, (192), 26 states have internal predecessors, (192), 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) [2024-10-11 14:25:27,775 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:25:27,775 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:25:27,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-10-11 14:25:27,976 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,20 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:25:27,976 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:25:27,976 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:25:27,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1128017449, now seen corresponding path program 2 times [2024-10-11 14:25:27,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:25:27,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483174694] [2024-10-11 14:25:27,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:25:27,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:25:27,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:25:28,324 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:25:28,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:25:28,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483174694] [2024-10-11 14:25:28,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483174694] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:25:28,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654416756] [2024-10-11 14:25:28,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:25:28,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:25:28,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:25:28,326 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:25:28,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-11 14:25:28,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:25:28,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:25:28,413 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-11 14:25:28,414 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:25:28,575 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:25:28,576 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 29 treesize of output 21 [2024-10-11 14:25:28,584 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:25:28,584 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:25:28,707 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-10-11 14:25:28,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-10-11 14:25:28,760 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:25:28,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654416756] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:25:28,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:25:28,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 21 [2024-10-11 14:25:28,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653863063] [2024-10-11 14:25:28,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:25:28,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-11 14:25:28,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:25:28,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-11 14:25:28,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2024-10-11 14:25:28,761 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:25:28,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 182 transitions, 2703 flow. Second operand has 22 states, 22 states have (on average 7.5) internal successors, (165), 22 states have internal predecessors, (165), 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) [2024-10-11 14:25:28,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:25:28,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:25:28,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:25:29,993 INFO L124 PetriNetUnfolderBase]: 2719/4952 cut-off events. [2024-10-11 14:25:29,993 INFO L125 PetriNetUnfolderBase]: For 66682/66682 co-relation queries the response was YES. [2024-10-11 14:25:30,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29356 conditions, 4952 events. 2719/4952 cut-off events. For 66682/66682 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 33283 event pairs, 818 based on Foata normal form. 16/4968 useless extension candidates. Maximal degree in co-relation 29266. Up to 3538 conditions per place. [2024-10-11 14:25:30,027 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 199 selfloop transitions, 99 changer transitions 11/312 dead transitions. [2024-10-11 14:25:30,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 312 transitions, 4559 flow [2024-10-11 14:25:30,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-11 14:25:30,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-10-11 14:25:30,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 307 transitions. [2024-10-11 14:25:30,028 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39158163265306123 [2024-10-11 14:25:30,029 INFO L175 Difference]: Start difference. First operand has 181 places, 182 transitions, 2703 flow. Second operand 28 states and 307 transitions. [2024-10-11 14:25:30,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 312 transitions, 4559 flow [2024-10-11 14:25:30,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 312 transitions, 4428 flow, removed 35 selfloop flow, removed 13 redundant places. [2024-10-11 14:25:30,164 INFO L231 Difference]: Finished difference. Result has 197 places, 209 transitions, 3386 flow [2024-10-11 14:25:30,164 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2563, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=3386, PETRI_PLACES=197, PETRI_TRANSITIONS=209} [2024-10-11 14:25:30,165 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 171 predicate places. [2024-10-11 14:25:30,165 INFO L471 AbstractCegarLoop]: Abstraction has has 197 places, 209 transitions, 3386 flow [2024-10-11 14:25:30,165 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.5) internal successors, (165), 22 states have internal predecessors, (165), 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) [2024-10-11 14:25:30,165 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:25:30,165 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:25:30,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-10-11 14:25:30,366 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,21 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:25:30,366 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:25:30,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:25:30,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1833896661, now seen corresponding path program 3 times [2024-10-11 14:25:30,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:25:30,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665827869] [2024-10-11 14:25:30,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:25:30,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:25:30,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:25:30,710 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:25:30,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:25:30,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665827869] [2024-10-11 14:25:30,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665827869] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:25:30,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551827925] [2024-10-11 14:25:30,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:25:30,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:25:30,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:25:30,713 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:25:30,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-11 14:25:30,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-11 14:25:30,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:25:30,817 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-10-11 14:25:30,818 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:25:30,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2024-10-11 14:25:30,864 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 19 treesize of output 1 [2024-10-11 14:25:30,891 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-11 14:25:30,891 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 11 treesize of output 11 [2024-10-11 14:25:30,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-11 14:25:30,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-10-11 14:25:31,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2024-10-11 14:25:31,152 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:25:31,152 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:25:31,570 INFO L349 Elim1Store]: treesize reduction 38, result has 53.7 percent of original size [2024-10-11 14:25:31,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 128 treesize of output 125 [2024-10-11 14:25:31,631 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse9 (* c_~i_BA~0 4)) (.cse3 (* c_~i_AB~0 4))) (let ((.cse0 (= c_~i_AB~0 |c_ULTIMATE.start_create_fresh_int_array_~i~0#1|)) (.cse6 (= c_~i_BA~0 |c_ULTIMATE.start_create_fresh_int_array_~i~0#1|)) (.cse2 (+ c_~A~0.offset 4 .cse3)) (.cse4 (* 4 |c_ULTIMATE.start_create_fresh_int_array_~i~0#1|)) (.cse5 (+ c_~A~0.offset .cse9 4))) (and (or .cse0 (forall ((|ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| Int) (v_arrayElimArr_1 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int#1| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| v_arrayElimArr_1) c_~A~0.base))) (or (not (= (select .cse1 .cse2) (select v_arrayElimArr_1 (+ 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse3)))) (= (select v_arrayElimArr_1 (+ .cse4 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (select .cse1 .cse5))))) (not .cse6)) (or .cse0 (and (forall ((|ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| Int) (v_arrayElimArr_1 (Array Int Int))) (let ((.cse7 (select (store |c_#memory_int#1| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| v_arrayElimArr_1) c_~A~0.base))) (let ((.cse8 (select .cse7 .cse5))) (or (not (= (select .cse7 .cse2) (select v_arrayElimArr_1 (+ 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse3)))) (= (select v_arrayElimArr_1 (+ .cse4 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) .cse8) (= (select v_arrayElimArr_1 (+ .cse9 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) .cse8))))) (or (forall ((|ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| Int) (v_arrayElimArr_1 (Array Int Int))) (let ((.cse10 (select (store |c_#memory_int#1| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| v_arrayElimArr_1) c_~A~0.base))) (or (not (= (select .cse10 .cse2) (select v_arrayElimArr_1 (+ 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse3)))) (= (select v_arrayElimArr_1 (+ .cse9 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (select .cse10 .cse5))))) .cse6))) (or (not .cse0) (and (forall ((|ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| Int) (v_arrayElimArr_1 (Array Int Int))) (let ((.cse11 (select (store |c_#memory_int#1| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| v_arrayElimArr_1) c_~A~0.base))) (let ((.cse12 (select v_arrayElimArr_1 (+ .cse4 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (.cse13 (select .cse11 .cse5))) (or (not (= (select .cse11 .cse2) .cse12)) (= .cse12 .cse13) (= (select v_arrayElimArr_1 (+ .cse9 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) .cse13))))) (or .cse6 (forall ((|ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| Int) (v_arrayElimArr_1 (Array Int Int))) (let ((.cse14 (select (store |c_#memory_int#1| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| v_arrayElimArr_1) c_~A~0.base))) (or (not (= (select .cse14 .cse2) (select v_arrayElimArr_1 (+ .cse4 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))) (= (select v_arrayElimArr_1 (+ .cse9 4 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (select .cse14 .cse5))))))))))) is different from false [2024-10-11 14:25:31,920 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:25:31,920 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 52 [2024-10-11 14:25:31,930 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-11 14:25:31,930 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 82 treesize of output 70 [2024-10-11 14:25:31,970 INFO L349 Elim1Store]: treesize reduction 16, result has 71.9 percent of original size [2024-10-11 14:25:31,971 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 74 [2024-10-11 14:25:32,011 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:25:32,012 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 58 [2024-10-11 14:25:32,021 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-11 14:25:32,021 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 94 treesize of output 79 [2024-10-11 14:25:32,064 INFO L349 Elim1Store]: treesize reduction 16, result has 75.4 percent of original size [2024-10-11 14:25:32,064 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 82 [2024-10-11 14:25:32,120 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:25:32,120 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 77 [2024-10-11 14:25:32,134 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-11 14:25:32,135 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 133 treesize of output 109 [2024-10-11 14:25:32,200 INFO L349 Elim1Store]: treesize reduction 24, result has 77.1 percent of original size [2024-10-11 14:25:32,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 106 treesize of output 129 [2024-10-11 14:25:32,295 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:25:32,296 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 52 [2024-10-11 14:25:32,303 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-11 14:25:32,304 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 82 treesize of output 70 [2024-10-11 14:25:32,340 INFO L349 Elim1Store]: treesize reduction 16, result has 71.9 percent of original size [2024-10-11 14:25:32,340 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 74 [2024-10-11 14:25:32,391 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:25:32,391 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 71 [2024-10-11 14:25:32,400 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-11 14:25:32,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 100 [2024-10-11 14:25:32,436 INFO L349 Elim1Store]: treesize reduction 16, result has 71.9 percent of original size [2024-10-11 14:25:32,436 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 97 treesize of output 89 [2024-10-11 14:25:32,571 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 2 times theorem prover too weak. 1 trivial. 2 not checked. [2024-10-11 14:25:32,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551827925] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:25:32,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:25:32,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 12] total 32 [2024-10-11 14:25:32,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398864450] [2024-10-11 14:25:32,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:25:32,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-11 14:25:32,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:25:32,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-11 14:25:32,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=834, Unknown=2, NotChecked=60, Total=1056 [2024-10-11 14:25:32,577 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:25:32,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 209 transitions, 3386 flow. Second operand has 33 states, 33 states have (on average 7.0) internal successors, (231), 33 states have internal predecessors, (231), 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) [2024-10-11 14:25:32,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:25:32,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:25:32,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:25:35,239 INFO L124 PetriNetUnfolderBase]: 3609/6556 cut-off events. [2024-10-11 14:25:35,240 INFO L125 PetriNetUnfolderBase]: For 107359/107359 co-relation queries the response was YES. [2024-10-11 14:25:35,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41119 conditions, 6556 events. 3609/6556 cut-off events. For 107359/107359 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 46396 event pairs, 1013 based on Foata normal form. 70/6626 useless extension candidates. Maximal degree in co-relation 41026. Up to 4220 conditions per place. [2024-10-11 14:25:35,285 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 313 selfloop transitions, 127 changer transitions 4/447 dead transitions. [2024-10-11 14:25:35,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 447 transitions, 7240 flow [2024-10-11 14:25:35,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-10-11 14:25:35,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-10-11 14:25:35,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 411 transitions. [2024-10-11 14:25:35,286 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4317226890756303 [2024-10-11 14:25:35,286 INFO L175 Difference]: Start difference. First operand has 197 places, 209 transitions, 3386 flow. Second operand 34 states and 411 transitions. [2024-10-11 14:25:35,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 447 transitions, 7240 flow [2024-10-11 14:25:35,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 447 transitions, 6863 flow, removed 125 selfloop flow, removed 17 redundant places. [2024-10-11 14:25:35,509 INFO L231 Difference]: Finished difference. Result has 223 places, 279 transitions, 4924 flow [2024-10-11 14:25:35,509 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=3194, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=4924, PETRI_PLACES=223, PETRI_TRANSITIONS=279} [2024-10-11 14:25:35,510 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 197 predicate places. [2024-10-11 14:25:35,510 INFO L471 AbstractCegarLoop]: Abstraction has has 223 places, 279 transitions, 4924 flow [2024-10-11 14:25:35,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 7.0) internal successors, (231), 33 states have internal predecessors, (231), 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) [2024-10-11 14:25:35,510 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:25:35,510 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:25:35,524 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-10-11 14:25:35,710 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-10-11 14:25:35,711 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:25:35,711 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:25:35,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1276340903, now seen corresponding path program 4 times [2024-10-11 14:25:35,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:25:35,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915550289] [2024-10-11 14:25:35,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:25:35,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:25:35,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:25:36,054 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:25:36,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:25:36,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915550289] [2024-10-11 14:25:36,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915550289] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:25:36,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781749134] [2024-10-11 14:25:36,055 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 14:25:36,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:25:36,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:25:36,057 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:25:36,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-10-11 14:25:36,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 14:25:36,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:25:36,163 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-11 14:25:36,164 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:25:36,277 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:25:36,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 25 [2024-10-11 14:25:36,285 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:25:36,285 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:25:36,400 INFO L349 Elim1Store]: treesize reduction 30, result has 63.9 percent of original size [2024-10-11 14:25:36,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2024-10-11 14:25:36,454 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:25:36,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781749134] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:25:36,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:25:36,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 19 [2024-10-11 14:25:36,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779803440] [2024-10-11 14:25:36,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:25:36,455 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-11 14:25:36,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:25:36,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-11 14:25:36,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-10-11 14:25:36,456 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:25:36,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 279 transitions, 4924 flow. Second operand has 20 states, 20 states have (on average 7.75) internal successors, (155), 20 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) [2024-10-11 14:25:36,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:25:36,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:25:36,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:25:38,177 INFO L124 PetriNetUnfolderBase]: 3492/6334 cut-off events. [2024-10-11 14:25:38,177 INFO L125 PetriNetUnfolderBase]: For 138348/138348 co-relation queries the response was YES. [2024-10-11 14:25:38,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42162 conditions, 6334 events. 3492/6334 cut-off events. For 138348/138348 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 44705 event pairs, 893 based on Foata normal form. 140/6474 useless extension candidates. Maximal degree in co-relation 42058. Up to 4293 conditions per place. [2024-10-11 14:25:38,234 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 259 selfloop transitions, 150 changer transitions 10/422 dead transitions. [2024-10-11 14:25:38,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 422 transitions, 7297 flow [2024-10-11 14:25:38,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-10-11 14:25:38,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-10-11 14:25:38,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 356 transitions. [2024-10-11 14:25:38,236 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39732142857142855 [2024-10-11 14:25:38,236 INFO L175 Difference]: Start difference. First operand has 223 places, 279 transitions, 4924 flow. Second operand 32 states and 356 transitions. [2024-10-11 14:25:38,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 422 transitions, 7297 flow [2024-10-11 14:25:38,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 422 transitions, 6681 flow, removed 243 selfloop flow, removed 19 redundant places. [2024-10-11 14:25:38,584 INFO L231 Difference]: Finished difference. Result has 239 places, 295 transitions, 5155 flow [2024-10-11 14:25:38,584 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=4457, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=5155, PETRI_PLACES=239, PETRI_TRANSITIONS=295} [2024-10-11 14:25:38,585 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 213 predicate places. [2024-10-11 14:25:38,585 INFO L471 AbstractCegarLoop]: Abstraction has has 239 places, 295 transitions, 5155 flow [2024-10-11 14:25:38,585 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.75) internal successors, (155), 20 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) [2024-10-11 14:25:38,585 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:25:38,585 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:25:38,598 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-10-11 14:25:38,786 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,23 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:25:38,786 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:25:38,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:25:38,786 INFO L85 PathProgramCache]: Analyzing trace with hash 936351649, now seen corresponding path program 5 times [2024-10-11 14:25:38,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:25:38,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860468970] [2024-10-11 14:25:38,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:25:38,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:25:38,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:25:39,106 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:25:39,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:25:39,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860468970] [2024-10-11 14:25:39,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860468970] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:25:39,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425381273] [2024-10-11 14:25:39,107 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 14:25:39,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:25:39,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:25:39,109 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:25:39,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-10-11 14:25:39,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-11 14:25:39,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:25:39,216 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-11 14:25:39,217 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:25:39,307 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:25:39,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 25 [2024-10-11 14:25:39,313 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:25:39,314 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:25:39,393 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-10-11 14:25:39,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-10-11 14:25:39,446 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:25:39,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425381273] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:25:39,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:25:39,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 6] total 18 [2024-10-11 14:25:39,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441088093] [2024-10-11 14:25:39,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:25:39,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-11 14:25:39,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:25:39,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-11 14:25:39,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2024-10-11 14:25:39,448 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:25:39,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 295 transitions, 5155 flow. Second operand has 19 states, 19 states have (on average 7.894736842105263) internal successors, (150), 19 states have internal predecessors, (150), 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) [2024-10-11 14:25:39,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:25:39,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:25:39,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:25:40,693 INFO L124 PetriNetUnfolderBase]: 3573/6491 cut-off events. [2024-10-11 14:25:40,693 INFO L125 PetriNetUnfolderBase]: For 122766/122768 co-relation queries the response was YES. [2024-10-11 14:25:40,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42552 conditions, 6491 events. 3573/6491 cut-off events. For 122766/122768 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 46016 event pairs, 1107 based on Foata normal form. 12/6503 useless extension candidates. Maximal degree in co-relation 42447. Up to 4839 conditions per place. [2024-10-11 14:25:40,753 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 259 selfloop transitions, 109 changer transitions 16/387 dead transitions. [2024-10-11 14:25:40,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 387 transitions, 6991 flow [2024-10-11 14:25:40,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-11 14:25:40,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-11 14:25:40,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 248 transitions. [2024-10-11 14:25:40,754 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4025974025974026 [2024-10-11 14:25:40,754 INFO L175 Difference]: Start difference. First operand has 239 places, 295 transitions, 5155 flow. Second operand 22 states and 248 transitions. [2024-10-11 14:25:40,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 387 transitions, 6991 flow [2024-10-11 14:25:41,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 387 transitions, 6679 flow, removed 15 selfloop flow, removed 24 redundant places. [2024-10-11 14:25:41,116 INFO L231 Difference]: Finished difference. Result has 241 places, 321 transitions, 5850 flow [2024-10-11 14:25:41,116 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=4823, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5850, PETRI_PLACES=241, PETRI_TRANSITIONS=321} [2024-10-11 14:25:41,117 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 215 predicate places. [2024-10-11 14:25:41,117 INFO L471 AbstractCegarLoop]: Abstraction has has 241 places, 321 transitions, 5850 flow [2024-10-11 14:25:41,117 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.894736842105263) internal successors, (150), 19 states have internal predecessors, (150), 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) [2024-10-11 14:25:41,117 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:25:41,117 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:25:41,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-10-11 14:25:41,321 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,24 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:25:41,321 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:25:41,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:25:41,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1964301891, now seen corresponding path program 6 times [2024-10-11 14:25:41,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:25:41,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413475608] [2024-10-11 14:25:41,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:25:41,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:25:41,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:25:41,641 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:25:41,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:25:41,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413475608] [2024-10-11 14:25:41,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413475608] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:25:41,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685818277] [2024-10-11 14:25:41,642 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 14:25:41,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:25:41,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:25:41,644 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:25:41,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-10-11 14:25:41,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-11 14:25:41,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:25:41,738 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-11 14:25:41,739 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:25:41,916 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-11 14:25:41,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-10-11 14:25:41,919 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:25:41,919 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:25:42,004 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-10-11 14:25:42,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-10-11 14:25:42,059 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:25:42,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685818277] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:25:42,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:25:42,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 21 [2024-10-11 14:25:42,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676532222] [2024-10-11 14:25:42,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:25:42,059 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-11 14:25:42,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:25:42,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-11 14:25:42,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2024-10-11 14:25:42,060 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:25:42,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 321 transitions, 5850 flow. Second operand has 22 states, 22 states have (on average 7.545454545454546) internal successors, (166), 22 states have internal predecessors, (166), 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) [2024-10-11 14:25:42,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:25:42,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:25:42,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:25:43,334 INFO L124 PetriNetUnfolderBase]: 3886/7024 cut-off events. [2024-10-11 14:25:43,334 INFO L125 PetriNetUnfolderBase]: For 147880/147882 co-relation queries the response was YES. [2024-10-11 14:25:43,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47205 conditions, 7024 events. 3886/7024 cut-off events. For 147880/147882 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 50132 event pairs, 1029 based on Foata normal form. 78/7102 useless extension candidates. Maximal degree in co-relation 47095. Up to 4374 conditions per place. [2024-10-11 14:25:43,402 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 287 selfloop transitions, 138 changer transitions 2/430 dead transitions. [2024-10-11 14:25:43,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 430 transitions, 8178 flow [2024-10-11 14:25:43,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-10-11 14:25:43,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-10-11 14:25:43,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 244 transitions. [2024-10-11 14:25:43,403 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-10-11 14:25:43,403 INFO L175 Difference]: Start difference. First operand has 241 places, 321 transitions, 5850 flow. Second operand 20 states and 244 transitions. [2024-10-11 14:25:43,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 430 transitions, 8178 flow [2024-10-11 14:25:44,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 430 transitions, 7539 flow, removed 267 selfloop flow, removed 13 redundant places. [2024-10-11 14:25:44,107 INFO L231 Difference]: Finished difference. Result has 248 places, 337 transitions, 6071 flow [2024-10-11 14:25:44,108 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=5405, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=6071, PETRI_PLACES=248, PETRI_TRANSITIONS=337} [2024-10-11 14:25:44,108 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 222 predicate places. [2024-10-11 14:25:44,108 INFO L471 AbstractCegarLoop]: Abstraction has has 248 places, 337 transitions, 6071 flow [2024-10-11 14:25:44,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.545454545454546) internal successors, (166), 22 states have internal predecessors, (166), 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) [2024-10-11 14:25:44,108 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:25:44,108 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:25:44,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-10-11 14:25:44,309 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-10-11 14:25:44,309 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:25:44,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:25:44,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1589704119, now seen corresponding path program 5 times [2024-10-11 14:25:44,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:25:44,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376839516] [2024-10-11 14:25:44,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:25:44,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:25:44,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:25:44,624 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:25:44,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:25:44,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376839516] [2024-10-11 14:25:44,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376839516] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:25:44,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900016998] [2024-10-11 14:25:44,625 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 14:25:44,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:25:44,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:25:44,627 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:25:44,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-10-11 14:25:44,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-10-11 14:25:44,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:25:44,747 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-11 14:25:44,748 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:25:44,837 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:25:44,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 25 [2024-10-11 14:25:44,845 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:25:44,845 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:25:44,925 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-10-11 14:25:44,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-10-11 14:25:44,975 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:25:44,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900016998] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:25:44,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:25:44,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 6] total 18 [2024-10-11 14:25:44,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869268079] [2024-10-11 14:25:44,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:25:44,977 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-11 14:25:44,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:25:44,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-11 14:25:44,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2024-10-11 14:25:44,981 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:25:44,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 337 transitions, 6071 flow. Second operand has 19 states, 19 states have (on average 7.894736842105263) internal successors, (150), 19 states have internal predecessors, (150), 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) [2024-10-11 14:25:44,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:25:44,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:25:44,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:25:46,784 INFO L124 PetriNetUnfolderBase]: 4214/7670 cut-off events. [2024-10-11 14:25:46,784 INFO L125 PetriNetUnfolderBase]: For 133050/133052 co-relation queries the response was YES. [2024-10-11 14:25:46,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49854 conditions, 7670 events. 4214/7670 cut-off events. For 133050/133052 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 56195 event pairs, 1310 based on Foata normal form. 26/7696 useless extension candidates. Maximal degree in co-relation 49742. Up to 5754 conditions per place. [2024-10-11 14:25:46,847 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 330 selfloop transitions, 121 changer transitions 10/464 dead transitions. [2024-10-11 14:25:46,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 464 transitions, 8229 flow [2024-10-11 14:25:46,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-11 14:25:46,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-10-11 14:25:46,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 311 transitions. [2024-10-11 14:25:46,849 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4113756613756614 [2024-10-11 14:25:46,849 INFO L175 Difference]: Start difference. First operand has 248 places, 337 transitions, 6071 flow. Second operand 27 states and 311 transitions. [2024-10-11 14:25:46,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 464 transitions, 8229 flow [2024-10-11 14:25:47,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 464 transitions, 7876 flow, removed 45 selfloop flow, removed 17 redundant places. [2024-10-11 14:25:47,452 INFO L231 Difference]: Finished difference. Result has 264 places, 365 transitions, 6680 flow [2024-10-11 14:25:47,452 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=5755, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=6680, PETRI_PLACES=264, PETRI_TRANSITIONS=365} [2024-10-11 14:25:47,452 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 238 predicate places. [2024-10-11 14:25:47,452 INFO L471 AbstractCegarLoop]: Abstraction has has 264 places, 365 transitions, 6680 flow [2024-10-11 14:25:47,452 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.894736842105263) internal successors, (150), 19 states have internal predecessors, (150), 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) [2024-10-11 14:25:47,453 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:25:47,453 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:25:47,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-10-11 14:25:47,653 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-10-11 14:25:47,653 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:25:47,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:25:47,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1031048031, now seen corresponding path program 7 times [2024-10-11 14:25:47,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:25:47,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378868459] [2024-10-11 14:25:47,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:25:47,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:25:47,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:25:47,966 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:25:47,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:25:47,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378868459] [2024-10-11 14:25:47,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378868459] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:25:47,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271561050] [2024-10-11 14:25:47,967 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-11 14:25:47,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:25:47,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:25:47,969 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:25:47,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-10-11 14:25:48,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:25:48,073 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-11 14:25:48,074 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:25:48,166 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:25:48,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 25 [2024-10-11 14:25:48,174 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:25:48,174 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:25:48,251 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-10-11 14:25:48,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-10-11 14:25:48,296 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:25:48,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271561050] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:25:48,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:25:48,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 6] total 18 [2024-10-11 14:25:48,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089889271] [2024-10-11 14:25:48,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:25:48,297 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-11 14:25:48,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:25:48,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-11 14:25:48,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2024-10-11 14:25:48,298 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:25:48,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 365 transitions, 6680 flow. Second operand has 19 states, 19 states have (on average 7.894736842105263) internal successors, (150), 19 states have internal predecessors, (150), 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) [2024-10-11 14:25:48,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:25:48,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:25:48,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:25:50,420 INFO L124 PetriNetUnfolderBase]: 4029/7322 cut-off events. [2024-10-11 14:25:50,420 INFO L125 PetriNetUnfolderBase]: For 134143/134145 co-relation queries the response was YES. [2024-10-11 14:25:50,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48361 conditions, 7322 events. 4029/7322 cut-off events. For 134143/134145 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 53009 event pairs, 1299 based on Foata normal form. 50/7372 useless extension candidates. Maximal degree in co-relation 48244. Up to 5582 conditions per place. [2024-10-11 14:25:50,480 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 294 selfloop transitions, 122 changer transitions 2/421 dead transitions. [2024-10-11 14:25:50,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 421 transitions, 7876 flow [2024-10-11 14:25:50,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-11 14:25:50,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-10-11 14:25:50,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 230 transitions. [2024-10-11 14:25:50,481 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-10-11 14:25:50,482 INFO L175 Difference]: Start difference. First operand has 264 places, 365 transitions, 6680 flow. Second operand 21 states and 230 transitions. [2024-10-11 14:25:50,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 421 transitions, 7876 flow [2024-10-11 14:25:50,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 421 transitions, 7636 flow, removed 88 selfloop flow, removed 12 redundant places. [2024-10-11 14:25:50,949 INFO L231 Difference]: Finished difference. Result has 270 places, 365 transitions, 6689 flow [2024-10-11 14:25:50,950 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=6416, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6689, PETRI_PLACES=270, PETRI_TRANSITIONS=365} [2024-10-11 14:25:50,950 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 244 predicate places. [2024-10-11 14:25:50,950 INFO L471 AbstractCegarLoop]: Abstraction has has 270 places, 365 transitions, 6689 flow [2024-10-11 14:25:50,950 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 7.894736842105263) internal successors, (150), 19 states have internal predecessors, (150), 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) [2024-10-11 14:25:50,950 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:25:50,950 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:25:51,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-10-11 14:25:51,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-10-11 14:25:51,151 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:25:51,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:25:51,151 INFO L85 PathProgramCache]: Analyzing trace with hash -812211079, now seen corresponding path program 6 times [2024-10-11 14:25:51,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:25:51,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934103006] [2024-10-11 14:25:51,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:25:51,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:25:51,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:25:51,530 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:25:51,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:25:51,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934103006] [2024-10-11 14:25:51,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934103006] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:25:51,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478184074] [2024-10-11 14:25:51,530 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 14:25:51,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:25:51,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:25:51,532 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:25:51,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-10-11 14:25:51,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-11 14:25:51,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:25:51,632 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-11 14:25:51,633 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:25:51,825 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-11 14:25:51,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-10-11 14:25:51,829 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:25:51,829 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:25:51,899 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-10-11 14:25:51,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-10-11 14:25:51,947 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 14:25:51,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478184074] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:25:51,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:25:51,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 21 [2024-10-11 14:25:51,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919099945] [2024-10-11 14:25:51,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:25:51,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-11 14:25:51,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:25:51,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-11 14:25:51,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2024-10-11 14:25:51,949 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:25:51,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 365 transitions, 6689 flow. Second operand has 22 states, 22 states have (on average 7.636363636363637) internal successors, (168), 22 states have internal predecessors, (168), 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) [2024-10-11 14:25:51,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:25:51,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:25:51,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:25:54,176 INFO L124 PetriNetUnfolderBase]: 4859/8864 cut-off events. [2024-10-11 14:25:54,176 INFO L125 PetriNetUnfolderBase]: For 152249/152249 co-relation queries the response was YES. [2024-10-11 14:25:54,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57463 conditions, 8864 events. 4859/8864 cut-off events. For 152249/152249 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 65374 event pairs, 1204 based on Foata normal form. 105/8969 useless extension candidates. Maximal degree in co-relation 57347. Up to 5198 conditions per place. [2024-10-11 14:25:54,254 INFO L140 encePairwiseOnDemand]: 17/28 looper letters, 427 selfloop transitions, 189 changer transitions 8/627 dead transitions. [2024-10-11 14:25:54,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 627 transitions, 11730 flow [2024-10-11 14:25:54,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-11 14:25:54,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-10-11 14:25:54,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 396 transitions. [2024-10-11 14:25:54,256 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4876847290640394 [2024-10-11 14:25:54,256 INFO L175 Difference]: Start difference. First operand has 270 places, 365 transitions, 6689 flow. Second operand 29 states and 396 transitions. [2024-10-11 14:25:54,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 627 transitions, 11730 flow [2024-10-11 14:25:54,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 627 transitions, 11366 flow, removed 18 selfloop flow, removed 18 redundant places. [2024-10-11 14:25:54,946 INFO L231 Difference]: Finished difference. Result has 288 places, 432 transitions, 8478 flow [2024-10-11 14:25:54,946 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=6407, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=8478, PETRI_PLACES=288, PETRI_TRANSITIONS=432} [2024-10-11 14:25:54,946 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 262 predicate places. [2024-10-11 14:25:54,947 INFO L471 AbstractCegarLoop]: Abstraction has has 288 places, 432 transitions, 8478 flow [2024-10-11 14:25:54,947 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.636363636363637) internal successors, (168), 22 states have internal predecessors, (168), 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) [2024-10-11 14:25:54,947 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:25:54,947 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:25:54,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-10-11 14:25:55,147 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-10-11 14:25:55,148 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:25:55,148 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:25:55,148 INFO L85 PathProgramCache]: Analyzing trace with hash 685513861, now seen corresponding path program 7 times [2024-10-11 14:25:55,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:25:55,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657381608] [2024-10-11 14:25:55,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:25:55,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:25:55,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:25:55,566 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:25:55,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:25:55,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657381608] [2024-10-11 14:25:55,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657381608] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:25:55,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691143926] [2024-10-11 14:25:55,567 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-11 14:25:55,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:25:55,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:25:55,569 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:25:55,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-10-11 14:25:55,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:25:55,748 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-11 14:25:55,749 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:25:55,866 INFO L349 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2024-10-11 14:25:55,867 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 35 treesize of output 20 [2024-10-11 14:25:55,869 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:25:55,869 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:25:55,950 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-10-11 14:25:55,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-10-11 14:25:55,990 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:25:55,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691143926] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:25:55,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:25:55,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 6] total 19 [2024-10-11 14:25:55,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406224589] [2024-10-11 14:25:55,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:25:55,991 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-11 14:25:55,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:25:55,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-11 14:25:55,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2024-10-11 14:25:55,992 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:25:55,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 432 transitions, 8478 flow. Second operand has 20 states, 20 states have (on average 7.9) internal successors, (158), 20 states have internal predecessors, (158), 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) [2024-10-11 14:25:55,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:25:55,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:25:55,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:25:58,039 INFO L124 PetriNetUnfolderBase]: 4799/8744 cut-off events. [2024-10-11 14:25:58,039 INFO L125 PetriNetUnfolderBase]: For 160709/160711 co-relation queries the response was YES. [2024-10-11 14:25:58,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58023 conditions, 8744 events. 4799/8744 cut-off events. For 160709/160711 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 64584 event pairs, 1523 based on Foata normal form. 14/8758 useless extension candidates. Maximal degree in co-relation 57899. Up to 6688 conditions per place. [2024-10-11 14:25:58,131 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 324 selfloop transitions, 124 changer transitions 18/469 dead transitions. [2024-10-11 14:25:58,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 469 transitions, 9488 flow [2024-10-11 14:25:58,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-11 14:25:58,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-11 14:25:58,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 186 transitions. [2024-10-11 14:25:58,133 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3907563025210084 [2024-10-11 14:25:58,133 INFO L175 Difference]: Start difference. First operand has 288 places, 432 transitions, 8478 flow. Second operand 17 states and 186 transitions. [2024-10-11 14:25:58,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 469 transitions, 9488 flow [2024-10-11 14:25:58,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 469 transitions, 9160 flow, removed 94 selfloop flow, removed 15 redundant places. [2024-10-11 14:25:58,886 INFO L231 Difference]: Finished difference. Result has 289 places, 424 transitions, 8247 flow [2024-10-11 14:25:58,886 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=8069, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=8247, PETRI_PLACES=289, PETRI_TRANSITIONS=424} [2024-10-11 14:25:58,887 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 263 predicate places. [2024-10-11 14:25:58,887 INFO L471 AbstractCegarLoop]: Abstraction has has 289 places, 424 transitions, 8247 flow [2024-10-11 14:25:58,887 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 7.9) internal successors, (158), 20 states have internal predecessors, (158), 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) [2024-10-11 14:25:58,887 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:25:58,887 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:25:58,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-10-11 14:25:59,087 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,29 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:25:59,088 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:25:59,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:25:59,088 INFO L85 PathProgramCache]: Analyzing trace with hash -247561881, now seen corresponding path program 8 times [2024-10-11 14:25:59,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:25:59,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807864968] [2024-10-11 14:25:59,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:25:59,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:25:59,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:25:59,519 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:25:59,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:25:59,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807864968] [2024-10-11 14:25:59,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807864968] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:25:59,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112574701] [2024-10-11 14:25:59,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:25:59,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:25:59,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:25:59,521 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:25:59,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-10-11 14:25:59,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:25:59,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:25:59,633 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-11 14:25:59,634 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:25:59,808 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:25:59,808 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 29 treesize of output 21 [2024-10-11 14:25:59,813 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:25:59,813 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:25:59,878 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-10-11 14:25:59,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-10-11 14:25:59,939 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 14:25:59,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112574701] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:25:59,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:25:59,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 6] total 20 [2024-10-11 14:25:59,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222613717] [2024-10-11 14:25:59,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:25:59,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-11 14:25:59,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:25:59,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-11 14:25:59,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2024-10-11 14:25:59,940 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:25:59,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 424 transitions, 8247 flow. Second operand has 21 states, 21 states have (on average 7.619047619047619) internal successors, (160), 21 states have internal predecessors, (160), 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) [2024-10-11 14:25:59,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:25:59,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:25:59,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:26:01,781 INFO L124 PetriNetUnfolderBase]: 4331/7827 cut-off events. [2024-10-11 14:26:01,782 INFO L125 PetriNetUnfolderBase]: For 150144/150146 co-relation queries the response was YES. [2024-10-11 14:26:02,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53145 conditions, 7827 events. 4331/7827 cut-off events. For 150144/150146 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 55958 event pairs, 1321 based on Foata normal form. 107/7934 useless extension candidates. Maximal degree in co-relation 53023. Up to 6026 conditions per place. [2024-10-11 14:26:02,031 INFO L140 encePairwiseOnDemand]: 18/28 looper letters, 313 selfloop transitions, 144 changer transitions 3/463 dead transitions. [2024-10-11 14:26:02,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 463 transitions, 9364 flow [2024-10-11 14:26:02,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-11 14:26:02,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-10-11 14:26:02,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 209 transitions. [2024-10-11 14:26:02,032 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-10-11 14:26:02,032 INFO L175 Difference]: Start difference. First operand has 289 places, 424 transitions, 8247 flow. Second operand 19 states and 209 transitions. [2024-10-11 14:26:02,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 463 transitions, 9364 flow [2024-10-11 14:26:02,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 463 transitions, 9030 flow, removed 18 selfloop flow, removed 16 redundant places. [2024-10-11 14:26:02,668 INFO L231 Difference]: Finished difference. Result has 285 places, 412 transitions, 8084 flow [2024-10-11 14:26:02,669 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=7785, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=8084, PETRI_PLACES=285, PETRI_TRANSITIONS=412} [2024-10-11 14:26:02,669 INFO L277 CegarLoopForPetriNet]: 26 programPoint places, 259 predicate places. [2024-10-11 14:26:02,669 INFO L471 AbstractCegarLoop]: Abstraction has has 285 places, 412 transitions, 8084 flow [2024-10-11 14:26:02,669 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.619047619047619) internal successors, (160), 21 states have internal predecessors, (160), 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) [2024-10-11 14:26:02,669 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:26:02,670 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:26:02,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-10-11 14:26:02,870 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,30 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:02,870 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:26:02,871 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:26:02,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1278345783, now seen corresponding path program 9 times [2024-10-11 14:26:02,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:26:02,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493666261] [2024-10-11 14:26:02,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:26:02,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:26:02,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:26:03,323 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:26:03,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:26:03,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493666261] [2024-10-11 14:26:03,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493666261] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:26:03,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827704629] [2024-10-11 14:26:03,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:26:03,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:26:03,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:26:03,326 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:26:03,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-10-11 14:26:03,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-11 14:26:03,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:26:03,443 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-10-11 14:26:03,444 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:26:03,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-11 14:26:03,698 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-11 14:26:03,698 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 27 treesize of output 15 [2024-10-11 14:26:03,700 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:26:03,700 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:26:03,946 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:26:03,946 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 168 treesize of output 164 [2024-10-11 14:26:03,955 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-11 14:26:03,955 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 50 treesize of output 39 [2024-10-11 14:26:04,017 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-10-11 14:26:04,018 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 190 treesize of output 185 [2024-10-11 14:26:04,262 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 14:26:04,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827704629] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:26:04,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:26:04,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 9] total 26 [2024-10-11 14:26:04,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579039912] [2024-10-11 14:26:04,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:26:04,263 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-11 14:26:04,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:26:04,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-11 14:26:04,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2024-10-11 14:26:04,264 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-11 14:26:04,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 412 transitions, 8084 flow. Second operand has 27 states, 27 states have (on average 7.222222222222222) internal successors, (195), 27 states have internal predecessors, (195), 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) [2024-10-11 14:26:04,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:26:04,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-11 14:26:04,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand