./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/chl-chromosome-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 23ca06a4d1d66eab783b29fc3ce31114eee62eb7d17a2452b84e2d73b8d92cfa --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 14:34:02,120 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 14:34:02,176 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-14 14:34:02,184 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 14:34:02,184 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 14:34:02,217 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 14:34:02,218 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 14:34:02,218 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 14:34:02,218 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 14:34:02,219 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 14:34:02,219 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 14:34:02,219 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 14:34:02,220 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 14:34:02,220 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 14:34:02,221 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 14:34:02,221 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 14:34:02,221 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-14 14:34:02,222 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 14:34:02,222 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 14:34:02,222 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 14:34:02,223 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 14:34:02,226 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-14 14:34:02,226 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 14:34:02,227 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-14 14:34:02,227 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 14:34:02,227 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 14:34:02,227 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-14 14:34:02,227 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 14:34:02,228 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 14:34:02,228 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 14:34:02,228 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 14:34:02,228 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 14:34:02,228 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 14:34:02,229 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 14:34:02,229 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 14:34:02,229 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-14 14:34:02,231 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 14:34:02,231 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 14:34:02,231 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 14:34:02,231 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 14:34:02,231 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 14:34:02,232 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 14:34:02,232 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23ca06a4d1d66eab783b29fc3ce31114eee62eb7d17a2452b84e2d73b8d92cfa [2024-10-14 14:34:02,501 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 14:34:02,524 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 14:34:02,529 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 14:34:02,530 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 14:34:02,534 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 14:34:02,535 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c [2024-10-14 14:34:04,056 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 14:34:04,248 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 14:34:04,248 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c [2024-10-14 14:34:04,256 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d0922d31/d9f78917ce074e57ada3047600d82aa3/FLAG3f2182a3c [2024-10-14 14:34:04,633 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d0922d31/d9f78917ce074e57ada3047600d82aa3 [2024-10-14 14:34:04,636 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 14:34:04,638 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 14:34:04,641 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 14:34:04,641 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 14:34:04,647 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 14:34:04,647 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:34:04" (1/1) ... [2024-10-14 14:34:04,648 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d90b660 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:34:04, skipping insertion in model container [2024-10-14 14:34:04,650 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:34:04" (1/1) ... [2024-10-14 14:34:04,674 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 14:34:04,883 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/chl-chromosome-symm.wvr.c[2721,2734] [2024-10-14 14:34:04,892 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 14:34:04,905 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 14:34:04,937 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/chl-chromosome-symm.wvr.c[2721,2734] [2024-10-14 14:34:04,944 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 14:34:04,974 INFO L204 MainTranslator]: Completed translation [2024-10-14 14:34:04,974 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:34:04 WrapperNode [2024-10-14 14:34:04,975 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 14:34:04,976 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 14:34:04,977 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 14:34:04,977 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 14:34:04,983 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:34:04" (1/1) ... [2024-10-14 14:34:04,996 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:34:04" (1/1) ... [2024-10-14 14:34:05,038 INFO L138 Inliner]: procedures = 24, calls = 27, calls flagged for inlining = 15, calls inlined = 19, statements flattened = 191 [2024-10-14 14:34:05,042 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 14:34:05,043 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 14:34:05,043 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 14:34:05,043 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 14:34:05,056 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:34:04" (1/1) ... [2024-10-14 14:34:05,057 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:34:04" (1/1) ... [2024-10-14 14:34:05,060 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:34:04" (1/1) ... [2024-10-14 14:34:05,086 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]. [2024-10-14 14:34:05,086 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:34:04" (1/1) ... [2024-10-14 14:34:05,086 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:34:04" (1/1) ... [2024-10-14 14:34:05,098 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:34:04" (1/1) ... [2024-10-14 14:34:05,102 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:34:04" (1/1) ... [2024-10-14 14:34:05,104 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:34:04" (1/1) ... [2024-10-14 14:34:05,105 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:34:04" (1/1) ... [2024-10-14 14:34:05,108 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 14:34:05,109 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 14:34:05,109 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 14:34:05,109 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 14:34:05,110 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:34:04" (1/1) ... [2024-10-14 14:34:05,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 14:34:05,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:34:05,152 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-14 14:34:05,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-14 14:34:05,199 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 14:34:05,200 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-14 14:34:05,200 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-14 14:34:05,200 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-14 14:34:05,200 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-14 14:34:05,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-14 14:34:05,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-14 14:34:05,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-14 14:34:05,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-14 14:34:05,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-14 14:34:05,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 14:34:05,201 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 14:34:05,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-14 14:34:05,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-14 14:34:05,202 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-14 14:34:05,296 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 14:34:05,298 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 14:34:05,617 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-14 14:34:05,617 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 14:34:05,876 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 14:34:05,878 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-14 14:34:05,879 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:34:05 BoogieIcfgContainer [2024-10-14 14:34:05,879 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 14:34:05,881 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 14:34:05,881 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 14:34:05,886 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 14:34:05,886 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 02:34:04" (1/3) ... [2024-10-14 14:34:05,887 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c2d4b7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:34:05, skipping insertion in model container [2024-10-14 14:34:05,887 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:34:04" (2/3) ... [2024-10-14 14:34:05,887 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c2d4b7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:34:05, skipping insertion in model container [2024-10-14 14:34:05,889 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:34:05" (3/3) ... [2024-10-14 14:34:05,891 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-symm.wvr.c [2024-10-14 14:34:05,907 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 14:34:05,908 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-14 14:34:05,908 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-14 14:34:05,954 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-14 14:34:05,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 22 transitions, 58 flow [2024-10-14 14:34:06,018 INFO L124 PetriNetUnfolderBase]: 4/20 cut-off events. [2024-10-14 14:34:06,018 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-14 14:34:06,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 20 events. 4/20 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 11 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 12. Up to 2 conditions per place. [2024-10-14 14:34:06,021 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 22 transitions, 58 flow [2024-10-14 14:34:06,024 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 22 places, 19 transitions, 50 flow [2024-10-14 14:34:06,037 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 14:34:06,046 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;@46489f84, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 14:34:06,046 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-14 14:34:06,058 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 14:34:06,059 INFO L124 PetriNetUnfolderBase]: 4/18 cut-off events. [2024-10-14 14:34:06,059 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-14 14:34:06,059 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:34:06,060 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:34:06,061 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:34:06,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:34:06,066 INFO L85 PathProgramCache]: Analyzing trace with hash 2024243091, now seen corresponding path program 1 times [2024-10-14 14:34:06,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:34:06,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817150617] [2024-10-14 14:34:06,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:34:06,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:34:06,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:34:06,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:34:06,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:34:06,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817150617] [2024-10-14 14:34:06,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817150617] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:34:06,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:34:06,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 14:34:06,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210991994] [2024-10-14 14:34:06,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:34:06,517 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 14:34:06,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:34:06,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 14:34:06,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 14:34:06,554 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:34:06,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2024-10-14 14:34:06,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:34:06,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:34:06,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:34:06,644 INFO L124 PetriNetUnfolderBase]: 39/74 cut-off events. [2024-10-14 14:34:06,645 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-10-14 14:34:06,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 74 events. 39/74 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 120 event pairs, 22 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 120. Up to 72 conditions per place. [2024-10-14 14:34:06,648 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 16 selfloop transitions, 4 changer transitions 0/21 dead transitions. [2024-10-14 14:34:06,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 21 transitions, 94 flow [2024-10-14 14:34:06,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 14:34:06,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 14:34:06,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 31 transitions. [2024-10-14 14:34:06,662 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-10-14 14:34:06,665 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 50 flow. Second operand 3 states and 31 transitions. [2024-10-14 14:34:06,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 21 transitions, 94 flow [2024-10-14 14:34:06,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 21 transitions, 86 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-14 14:34:06,670 INFO L231 Difference]: Finished difference. Result has 21 places, 21 transitions, 64 flow [2024-10-14 14:34:06,672 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=64, PETRI_PLACES=21, PETRI_TRANSITIONS=21} [2024-10-14 14:34:06,678 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2024-10-14 14:34:06,678 INFO L471 AbstractCegarLoop]: Abstraction has has 21 places, 21 transitions, 64 flow [2024-10-14 14:34:06,679 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2024-10-14 14:34:06,679 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:34:06,679 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:34:06,680 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 14:34:06,680 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:34:06,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:34:06,681 INFO L85 PathProgramCache]: Analyzing trace with hash -637121085, now seen corresponding path program 1 times [2024-10-14 14:34:06,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:34:06,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188475199] [2024-10-14 14:34:06,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:34:06,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:34:06,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:34:06,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:34:06,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:34:06,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188475199] [2024-10-14 14:34:06,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188475199] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:34:06,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907229115] [2024-10-14 14:34:06,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:34:06,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:34:06,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:34:06,889 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:34:06,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-14 14:34:07,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:34:07,010 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-14 14:34:07,015 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:34:07,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:34:07,071 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:34:07,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:34:07,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907229115] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:34:07,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:34:07,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-10-14 14:34:07,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169405986] [2024-10-14 14:34:07,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:34:07,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-14 14:34:07,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:34:07,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-14 14:34:07,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-10-14 14:34:07,103 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:34:07,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 21 transitions, 64 flow. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 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) [2024-10-14 14:34:07,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:34:07,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:34:07,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:34:07,258 INFO L124 PetriNetUnfolderBase]: 39/80 cut-off events. [2024-10-14 14:34:07,260 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-14 14:34:07,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 80 events. 39/80 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 121 event pairs, 22 based on Foata normal form. 3/67 useless extension candidates. Maximal degree in co-relation 152. Up to 72 conditions per place. [2024-10-14 14:34:07,262 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 16 selfloop transitions, 10 changer transitions 0/27 dead transitions. [2024-10-14 14:34:07,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 27 transitions, 140 flow [2024-10-14 14:34:07,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 14:34:07,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-14 14:34:07,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 50 transitions. [2024-10-14 14:34:07,265 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3787878787878788 [2024-10-14 14:34:07,265 INFO L175 Difference]: Start difference. First operand has 21 places, 21 transitions, 64 flow. Second operand 6 states and 50 transitions. [2024-10-14 14:34:07,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 27 transitions, 140 flow [2024-10-14 14:34:07,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 27 transitions, 136 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 14:34:07,267 INFO L231 Difference]: Finished difference. Result has 28 places, 27 transitions, 126 flow [2024-10-14 14:34:07,268 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=126, PETRI_PLACES=28, PETRI_TRANSITIONS=27} [2024-10-14 14:34:07,268 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 6 predicate places. [2024-10-14 14:34:07,269 INFO L471 AbstractCegarLoop]: Abstraction has has 28 places, 27 transitions, 126 flow [2024-10-14 14:34:07,269 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 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) [2024-10-14 14:34:07,269 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:34:07,269 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:34:07,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-14 14:34:07,473 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:34:07,474 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:34:07,475 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:34:07,475 INFO L85 PathProgramCache]: Analyzing trace with hash 320875781, now seen corresponding path program 2 times [2024-10-14 14:34:07,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:34:07,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011128308] [2024-10-14 14:34:07,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:34:07,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:34:07,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:34:07,708 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-14 14:34:07,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:34:07,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011128308] [2024-10-14 14:34:07,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011128308] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:34:07,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385832426] [2024-10-14 14:34:07,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 14:34:07,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:34:07,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:34:07,712 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:34:07,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-14 14:34:07,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-14 14:34:07,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:34:07,883 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-14 14:34:07,885 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:34:07,999 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-14 14:34:07,999 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 14:34:07,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385832426] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:34:07,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 14:34:08,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2024-10-14 14:34:08,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857322137] [2024-10-14 14:34:08,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:34:08,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 14:34:08,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:34:08,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 14:34:08,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-10-14 14:34:08,003 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:34:08,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 27 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 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) [2024-10-14 14:34:08,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:34:08,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:34:08,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:34:08,147 INFO L124 PetriNetUnfolderBase]: 61/124 cut-off events. [2024-10-14 14:34:08,148 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-14 14:34:08,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293 conditions, 124 events. 61/124 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 288 event pairs, 22 based on Foata normal form. 3/98 useless extension candidates. Maximal degree in co-relation 232. Up to 80 conditions per place. [2024-10-14 14:34:08,151 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 37 selfloop transitions, 3 changer transitions 2/43 dead transitions. [2024-10-14 14:34:08,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 43 transitions, 246 flow [2024-10-14 14:34:08,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 14:34:08,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 14:34:08,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 47 transitions. [2024-10-14 14:34:08,155 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5340909090909091 [2024-10-14 14:34:08,155 INFO L175 Difference]: Start difference. First operand has 28 places, 27 transitions, 126 flow. Second operand 4 states and 47 transitions. [2024-10-14 14:34:08,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 43 transitions, 246 flow [2024-10-14 14:34:08,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 43 transitions, 230 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-14 14:34:08,158 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 130 flow [2024-10-14 14:34:08,158 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=130, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2024-10-14 14:34:08,159 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 10 predicate places. [2024-10-14 14:34:08,159 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 130 flow [2024-10-14 14:34:08,159 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 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) [2024-10-14 14:34:08,159 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:34:08,159 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:34:08,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-14 14:34:08,360 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-10-14 14:34:08,361 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:34:08,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:34:08,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1510976613, now seen corresponding path program 3 times [2024-10-14 14:34:08,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:34:08,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127857110] [2024-10-14 14:34:08,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:34:08,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:34:08,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:34:08,604 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-14 14:34:08,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:34:08,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127857110] [2024-10-14 14:34:08,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127857110] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:34:08,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595658223] [2024-10-14 14:34:08,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 14:34:08,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:34:08,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:34:08,608 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:34:08,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-14 14:34:08,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-10-14 14:34:08,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:34:08,724 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-14 14:34:08,726 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:34:08,808 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-14 14:34:08,808 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 14:34:08,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595658223] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:34:08,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 14:34:08,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2024-10-14 14:34:08,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973419864] [2024-10-14 14:34:08,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:34:08,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 14:34:08,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:34:08,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 14:34:08,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-10-14 14:34:08,811 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:34:08,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 130 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 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) [2024-10-14 14:34:08,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:34:08,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:34:08,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:34:08,917 INFO L124 PetriNetUnfolderBase]: 93/186 cut-off events. [2024-10-14 14:34:08,918 INFO L125 PetriNetUnfolderBase]: For 94/94 co-relation queries the response was YES. [2024-10-14 14:34:08,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 501 conditions, 186 events. 93/186 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 522 event pairs, 39 based on Foata normal form. 2/151 useless extension candidates. Maximal degree in co-relation 445. Up to 126 conditions per place. [2024-10-14 14:34:08,920 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 42 selfloop transitions, 3 changer transitions 0/46 dead transitions. [2024-10-14 14:34:08,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 46 transitions, 282 flow [2024-10-14 14:34:08,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 14:34:08,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 14:34:08,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2024-10-14 14:34:08,921 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-10-14 14:34:08,921 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 130 flow. Second operand 4 states and 44 transitions. [2024-10-14 14:34:08,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 46 transitions, 282 flow [2024-10-14 14:34:08,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 46 transitions, 271 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-10-14 14:34:08,924 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 146 flow [2024-10-14 14:34:08,924 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=146, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2024-10-14 14:34:08,925 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 14 predicate places. [2024-10-14 14:34:08,925 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 146 flow [2024-10-14 14:34:08,925 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 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) [2024-10-14 14:34:08,925 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:34:08,925 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:34:08,943 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-14 14:34:09,126 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:34:09,127 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:34:09,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:34:09,127 INFO L85 PathProgramCache]: Analyzing trace with hash 2094827693, now seen corresponding path program 4 times [2024-10-14 14:34:09,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:34:09,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337177175] [2024-10-14 14:34:09,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:34:09,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:34:09,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:34:09,270 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-14 14:34:09,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:34:09,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337177175] [2024-10-14 14:34:09,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337177175] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:34:09,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868462590] [2024-10-14 14:34:09,271 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 14:34:09,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:34:09,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:34:09,274 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:34:09,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-14 14:34:09,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 14:34:09,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:34:09,393 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-14 14:34:09,395 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:34:09,459 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-14 14:34:09,459 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:34:09,501 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-14 14:34:09,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868462590] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:34:09,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:34:09,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-10-14 14:34:09,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598063873] [2024-10-14 14:34:09,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:34:09,504 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-14 14:34:09,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:34:09,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-14 14:34:09,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2024-10-14 14:34:09,507 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:34:09,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 146 flow. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 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) [2024-10-14 14:34:09,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:34:09,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:34:09,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:34:09,617 INFO L124 PetriNetUnfolderBase]: 93/188 cut-off events. [2024-10-14 14:34:09,618 INFO L125 PetriNetUnfolderBase]: For 163/163 co-relation queries the response was YES. [2024-10-14 14:34:09,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 578 conditions, 188 events. 93/188 cut-off events. For 163/163 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 512 event pairs, 67 based on Foata normal form. 1/164 useless extension candidates. Maximal degree in co-relation 512. Up to 175 conditions per place. [2024-10-14 14:34:09,620 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 20 selfloop transitions, 12 changer transitions 0/33 dead transitions. [2024-10-14 14:34:09,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 33 transitions, 222 flow [2024-10-14 14:34:09,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-14 14:34:09,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-14 14:34:09,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 51 transitions. [2024-10-14 14:34:09,621 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.33116883116883117 [2024-10-14 14:34:09,621 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 146 flow. Second operand 7 states and 51 transitions. [2024-10-14 14:34:09,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 33 transitions, 222 flow [2024-10-14 14:34:09,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 33 transitions, 218 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-14 14:34:09,624 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 188 flow [2024-10-14 14:34:09,624 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=188, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2024-10-14 14:34:09,625 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 20 predicate places. [2024-10-14 14:34:09,625 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 188 flow [2024-10-14 14:34:09,625 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 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) [2024-10-14 14:34:09,625 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:34:09,626 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:34:09,642 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-14 14:34:09,826 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:34:09,826 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:34:09,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:34:09,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1695419871, now seen corresponding path program 5 times [2024-10-14 14:34:09,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:34:09,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312544428] [2024-10-14 14:34:09,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:34:09,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:34:09,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:34:10,024 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:10,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:34:10,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312544428] [2024-10-14 14:34:10,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312544428] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:34:10,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:34:10,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 14:34:10,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26269369] [2024-10-14 14:34:10,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:34:10,026 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 14:34:10,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:34:10,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 14:34:10,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 14:34:10,027 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:34:10,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 188 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 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) [2024-10-14 14:34:10,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:34:10,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:34:10,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:34:10,152 INFO L124 PetriNetUnfolderBase]: 105/208 cut-off events. [2024-10-14 14:34:10,154 INFO L125 PetriNetUnfolderBase]: For 120/120 co-relation queries the response was YES. [2024-10-14 14:34:10,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 620 conditions, 208 events. 105/208 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 627 event pairs, 39 based on Foata normal form. 8/190 useless extension candidates. Maximal degree in co-relation 542. Up to 126 conditions per place. [2024-10-14 14:34:10,158 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 45 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2024-10-14 14:34:10,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 50 transitions, 343 flow [2024-10-14 14:34:10,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 14:34:10,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 14:34:10,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 46 transitions. [2024-10-14 14:34:10,161 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2024-10-14 14:34:10,161 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 188 flow. Second operand 4 states and 46 transitions. [2024-10-14 14:34:10,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 50 transitions, 343 flow [2024-10-14 14:34:10,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 50 transitions, 319 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-10-14 14:34:10,166 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 189 flow [2024-10-14 14:34:10,166 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=189, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2024-10-14 14:34:10,167 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 21 predicate places. [2024-10-14 14:34:10,167 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 189 flow [2024-10-14 14:34:10,168 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 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) [2024-10-14 14:34:10,169 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:34:10,169 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:34:10,169 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-14 14:34:10,169 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:34:10,169 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:34:10,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1072477483, now seen corresponding path program 6 times [2024-10-14 14:34:10,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:34:10,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263172526] [2024-10-14 14:34:10,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:34:10,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:34:10,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:34:10,375 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:10,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:34:10,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263172526] [2024-10-14 14:34:10,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263172526] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:34:10,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:34:10,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 14:34:10,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095180776] [2024-10-14 14:34:10,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:34:10,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 14:34:10,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:34:10,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 14:34:10,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 14:34:10,378 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:34:10,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 189 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 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) [2024-10-14 14:34:10,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:34:10,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:34:10,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:34:10,478 INFO L124 PetriNetUnfolderBase]: 89/174 cut-off events. [2024-10-14 14:34:10,478 INFO L125 PetriNetUnfolderBase]: For 208/208 co-relation queries the response was YES. [2024-10-14 14:34:10,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 582 conditions, 174 events. 89/174 cut-off events. For 208/208 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 462 event pairs, 12 based on Foata normal form. 8/159 useless extension candidates. Maximal degree in co-relation 513. Up to 115 conditions per place. [2024-10-14 14:34:10,483 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 38 selfloop transitions, 6 changer transitions 1/46 dead transitions. [2024-10-14 14:34:10,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 324 flow [2024-10-14 14:34:10,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 14:34:10,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 14:34:10,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 40 transitions. [2024-10-14 14:34:10,484 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-10-14 14:34:10,484 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 189 flow. Second operand 4 states and 40 transitions. [2024-10-14 14:34:10,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 324 flow [2024-10-14 14:34:10,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 46 transitions, 317 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-14 14:34:10,487 INFO L231 Difference]: Finished difference. Result has 47 places, 36 transitions, 212 flow [2024-10-14 14:34:10,490 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=212, PETRI_PLACES=47, PETRI_TRANSITIONS=36} [2024-10-14 14:34:10,490 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 25 predicate places. [2024-10-14 14:34:10,490 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 36 transitions, 212 flow [2024-10-14 14:34:10,491 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 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) [2024-10-14 14:34:10,491 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:34:10,491 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:34:10,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-14 14:34:10,491 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:34:10,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:34:10,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1385481324, now seen corresponding path program 1 times [2024-10-14 14:34:10,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:34:10,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812774590] [2024-10-14 14:34:10,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:34:10,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:34:10,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:34:10,746 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-10-14 14:34:10,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:34:10,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812774590] [2024-10-14 14:34:10,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812774590] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:34:10,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:34:10,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 14:34:10,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487381751] [2024-10-14 14:34:10,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:34:10,750 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 14:34:10,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:34:10,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 14:34:10,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 14:34:10,751 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:34:10,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 36 transitions, 212 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 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) [2024-10-14 14:34:10,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:34:10,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:34:10,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:34:10,858 INFO L124 PetriNetUnfolderBase]: 90/173 cut-off events. [2024-10-14 14:34:10,858 INFO L125 PetriNetUnfolderBase]: For 247/247 co-relation queries the response was YES. [2024-10-14 14:34:10,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 588 conditions, 173 events. 90/173 cut-off events. For 247/247 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 435 event pairs, 15 based on Foata normal form. 7/155 useless extension candidates. Maximal degree in co-relation 516. Up to 135 conditions per place. [2024-10-14 14:34:10,860 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 41 selfloop transitions, 7 changer transitions 1/50 dead transitions. [2024-10-14 14:34:10,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 50 transitions, 361 flow [2024-10-14 14:34:10,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 14:34:10,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 14:34:10,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 42 transitions. [2024-10-14 14:34:10,861 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-10-14 14:34:10,861 INFO L175 Difference]: Start difference. First operand has 47 places, 36 transitions, 212 flow. Second operand 4 states and 42 transitions. [2024-10-14 14:34:10,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 50 transitions, 361 flow [2024-10-14 14:34:10,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 50 transitions, 345 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-10-14 14:34:10,869 INFO L231 Difference]: Finished difference. Result has 47 places, 38 transitions, 239 flow [2024-10-14 14:34:10,869 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=239, PETRI_PLACES=47, PETRI_TRANSITIONS=38} [2024-10-14 14:34:10,870 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 25 predicate places. [2024-10-14 14:34:10,870 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 38 transitions, 239 flow [2024-10-14 14:34:10,871 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 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) [2024-10-14 14:34:10,871 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:34:10,871 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:34:10,871 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-14 14:34:10,871 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:34:10,872 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:34:10,872 INFO L85 PathProgramCache]: Analyzing trace with hash 134918016, now seen corresponding path program 2 times [2024-10-14 14:34:10,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:34:10,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158405815] [2024-10-14 14:34:10,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:34:10,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:34:10,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:34:11,083 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-10-14 14:34:11,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:34:11,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158405815] [2024-10-14 14:34:11,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158405815] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:34:11,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:34:11,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 14:34:11,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782291626] [2024-10-14 14:34:11,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:34:11,085 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 14:34:11,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:34:11,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 14:34:11,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 14:34:11,086 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:34:11,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 38 transitions, 239 flow. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 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) [2024-10-14 14:34:11,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:34:11,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:34:11,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:34:11,206 INFO L124 PetriNetUnfolderBase]: 80/153 cut-off events. [2024-10-14 14:34:11,206 INFO L125 PetriNetUnfolderBase]: For 399/399 co-relation queries the response was YES. [2024-10-14 14:34:11,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 560 conditions, 153 events. 80/153 cut-off events. For 399/399 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 354 event pairs, 27 based on Foata normal form. 7/137 useless extension candidates. Maximal degree in co-relation 487. Up to 118 conditions per place. [2024-10-14 14:34:11,207 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 41 selfloop transitions, 7 changer transitions 1/50 dead transitions. [2024-10-14 14:34:11,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 50 transitions, 390 flow [2024-10-14 14:34:11,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 14:34:11,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 14:34:11,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 43 transitions. [2024-10-14 14:34:11,211 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48863636363636365 [2024-10-14 14:34:11,211 INFO L175 Difference]: Start difference. First operand has 47 places, 38 transitions, 239 flow. Second operand 4 states and 43 transitions. [2024-10-14 14:34:11,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 50 transitions, 390 flow [2024-10-14 14:34:11,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 50 transitions, 381 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-10-14 14:34:11,214 INFO L231 Difference]: Finished difference. Result has 50 places, 39 transitions, 262 flow [2024-10-14 14:34:11,215 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=262, PETRI_PLACES=50, PETRI_TRANSITIONS=39} [2024-10-14 14:34:11,215 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 28 predicate places. [2024-10-14 14:34:11,216 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 39 transitions, 262 flow [2024-10-14 14:34:11,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 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) [2024-10-14 14:34:11,216 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:34:11,216 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:34:11,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-14 14:34:11,216 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:34:11,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:34:11,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1888690876, now seen corresponding path program 1 times [2024-10-14 14:34:11,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:34:11,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606842425] [2024-10-14 14:34:11,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:34:11,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:34:11,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:34:13,006 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-14 14:34:13,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:34:13,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606842425] [2024-10-14 14:34:13,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606842425] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:34:13,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779725027] [2024-10-14 14:34:13,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:34:13,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:34:13,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:34:13,009 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:34:13,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-14 14:34:13,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:34:13,136 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-14 14:34:13,139 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:34:13,269 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:34:13,270 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 23 [2024-10-14 14:34:13,320 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:13,320 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:34:13,858 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-10-14 14:34:13,858 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 126 treesize of output 79 [2024-10-14 14:34:13,900 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:13,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779725027] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:34:13,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:34:13,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 8] total 28 [2024-10-14 14:34:13,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235318781] [2024-10-14 14:34:13,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:34:13,904 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-10-14 14:34:13,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:34:13,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-10-14 14:34:13,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2024-10-14 14:34:13,905 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:34:13,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 39 transitions, 262 flow. Second operand has 28 states, 28 states have (on average 4.785714285714286) internal successors, (134), 28 states have internal predecessors, (134), 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) [2024-10-14 14:34:13,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:34:13,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:34:13,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:34:15,170 INFO L124 PetriNetUnfolderBase]: 143/271 cut-off events. [2024-10-14 14:34:15,171 INFO L125 PetriNetUnfolderBase]: For 654/654 co-relation queries the response was YES. [2024-10-14 14:34:15,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1008 conditions, 271 events. 143/271 cut-off events. For 654/654 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 821 event pairs, 12 based on Foata normal form. 1/221 useless extension candidates. Maximal degree in co-relation 877. Up to 99 conditions per place. [2024-10-14 14:34:15,173 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 46 selfloop transitions, 40 changer transitions 1/88 dead transitions. [2024-10-14 14:34:15,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 88 transitions, 705 flow [2024-10-14 14:34:15,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-14 14:34:15,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-10-14 14:34:15,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 150 transitions. [2024-10-14 14:34:15,179 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2840909090909091 [2024-10-14 14:34:15,179 INFO L175 Difference]: Start difference. First operand has 50 places, 39 transitions, 262 flow. Second operand 24 states and 150 transitions. [2024-10-14 14:34:15,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 88 transitions, 705 flow [2024-10-14 14:34:15,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 88 transitions, 671 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-10-14 14:34:15,185 INFO L231 Difference]: Finished difference. Result has 75 places, 59 transitions, 525 flow [2024-10-14 14:34:15,185 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=525, PETRI_PLACES=75, PETRI_TRANSITIONS=59} [2024-10-14 14:34:15,186 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 53 predicate places. [2024-10-14 14:34:15,186 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 59 transitions, 525 flow [2024-10-14 14:34:15,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.785714285714286) internal successors, (134), 28 states have internal predecessors, (134), 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) [2024-10-14 14:34:15,187 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:34:15,187 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:34:15,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-14 14:34:15,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-14 14:34:15,388 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:34:15,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:34:15,388 INFO L85 PathProgramCache]: Analyzing trace with hash 200974240, now seen corresponding path program 2 times [2024-10-14 14:34:15,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:34:15,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505903271] [2024-10-14 14:34:15,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:34:15,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:34:15,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:34:16,099 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:16,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:34:16,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505903271] [2024-10-14 14:34:16,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505903271] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:34:16,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417032755] [2024-10-14 14:34:16,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 14:34:16,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:34:16,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:34:16,102 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:34:16,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-14 14:34:16,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 14:34:16,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:34:16,238 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-14 14:34:16,240 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:34:16,343 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:34:16,344 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 19 [2024-10-14 14:34:16,381 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:16,381 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:34:16,745 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-10-14 14:34:16,745 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 173 treesize of output 107 [2024-10-14 14:34:16,847 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:16,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417032755] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:34:16,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:34:16,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 18 [2024-10-14 14:34:16,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441670924] [2024-10-14 14:34:16,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:34:16,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-14 14:34:16,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:34:16,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-14 14:34:16,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2024-10-14 14:34:16,853 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:34:16,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 59 transitions, 525 flow. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 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) [2024-10-14 14:34:16,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:34:16,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:34:16,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:34:17,209 INFO L124 PetriNetUnfolderBase]: 163/306 cut-off events. [2024-10-14 14:34:17,209 INFO L125 PetriNetUnfolderBase]: For 782/782 co-relation queries the response was YES. [2024-10-14 14:34:17,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1247 conditions, 306 events. 163/306 cut-off events. For 782/782 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 955 event pairs, 26 based on Foata normal form. 1/307 useless extension candidates. Maximal degree in co-relation 1176. Up to 218 conditions per place. [2024-10-14 14:34:17,213 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 56 selfloop transitions, 23 changer transitions 1/81 dead transitions. [2024-10-14 14:34:17,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 81 transitions, 772 flow [2024-10-14 14:34:17,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-14 14:34:17,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-14 14:34:17,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 79 transitions. [2024-10-14 14:34:17,214 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32644628099173556 [2024-10-14 14:34:17,214 INFO L175 Difference]: Start difference. First operand has 75 places, 59 transitions, 525 flow. Second operand 11 states and 79 transitions. [2024-10-14 14:34:17,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 81 transitions, 772 flow [2024-10-14 14:34:17,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 81 transitions, 634 flow, removed 37 selfloop flow, removed 11 redundant places. [2024-10-14 14:34:17,219 INFO L231 Difference]: Finished difference. Result has 77 places, 66 transitions, 497 flow [2024-10-14 14:34:17,219 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=497, PETRI_PLACES=77, PETRI_TRANSITIONS=66} [2024-10-14 14:34:17,220 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 55 predicate places. [2024-10-14 14:34:17,220 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 66 transitions, 497 flow [2024-10-14 14:34:17,220 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 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) [2024-10-14 14:34:17,220 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:34:17,221 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:34:17,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-14 14:34:17,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:34:17,421 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:34:17,422 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:34:17,422 INFO L85 PathProgramCache]: Analyzing trace with hash 988624800, now seen corresponding path program 3 times [2024-10-14 14:34:17,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:34:17,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543316094] [2024-10-14 14:34:17,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:34:17,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:34:17,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:34:18,057 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:18,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:34:18,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543316094] [2024-10-14 14:34:18,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543316094] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:34:18,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360211741] [2024-10-14 14:34:18,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 14:34:18,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:34:18,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:34:18,060 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:34:18,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-14 14:34:18,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-14 14:34:18,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:34:18,176 INFO L255 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-14 14:34:18,178 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:34:18,263 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:34:18,263 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 19 [2024-10-14 14:34:18,294 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:18,294 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:34:18,727 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-10-14 14:34:18,728 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 173 treesize of output 107 [2024-10-14 14:34:18,828 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:18,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360211741] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:34:18,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:34:18,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2024-10-14 14:34:18,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598279351] [2024-10-14 14:34:18,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:34:18,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-14 14:34:18,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:34:18,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-14 14:34:18,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2024-10-14 14:34:18,830 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:34:18,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 66 transitions, 497 flow. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 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) [2024-10-14 14:34:18,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:34:18,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:34:18,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:34:19,289 INFO L124 PetriNetUnfolderBase]: 177/331 cut-off events. [2024-10-14 14:34:19,289 INFO L125 PetriNetUnfolderBase]: For 1039/1039 co-relation queries the response was YES. [2024-10-14 14:34:19,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1427 conditions, 331 events. 177/331 cut-off events. For 1039/1039 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1088 event pairs, 25 based on Foata normal form. 1/332 useless extension candidates. Maximal degree in co-relation 1369. Up to 234 conditions per place. [2024-10-14 14:34:19,292 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 61 selfloop transitions, 27 changer transitions 2/91 dead transitions. [2024-10-14 14:34:19,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 91 transitions, 794 flow [2024-10-14 14:34:19,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-14 14:34:19,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-14 14:34:19,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 88 transitions. [2024-10-14 14:34:19,294 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-10-14 14:34:19,295 INFO L175 Difference]: Start difference. First operand has 77 places, 66 transitions, 497 flow. Second operand 12 states and 88 transitions. [2024-10-14 14:34:19,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 91 transitions, 794 flow [2024-10-14 14:34:19,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 91 transitions, 733 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-10-14 14:34:19,302 INFO L231 Difference]: Finished difference. Result has 84 places, 74 transitions, 577 flow [2024-10-14 14:34:19,302 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=577, PETRI_PLACES=84, PETRI_TRANSITIONS=74} [2024-10-14 14:34:19,302 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 62 predicate places. [2024-10-14 14:34:19,303 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 74 transitions, 577 flow [2024-10-14 14:34:19,304 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 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) [2024-10-14 14:34:19,304 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:34:19,304 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:34:19,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-14 14:34:19,508 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:34:19,509 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:34:19,509 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:34:19,509 INFO L85 PathProgramCache]: Analyzing trace with hash 981795176, now seen corresponding path program 4 times [2024-10-14 14:34:19,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:34:19,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677123868] [2024-10-14 14:34:19,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:34:19,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:34:19,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:34:20,396 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:20,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:34:20,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677123868] [2024-10-14 14:34:20,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677123868] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:34:20,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368525746] [2024-10-14 14:34:20,397 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 14:34:20,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:34:20,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:34:20,399 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:34:20,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-14 14:34:20,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 14:34:20,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:34:20,521 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-14 14:34:20,525 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:34:20,589 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:34:20,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-10-14 14:34:20,650 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:20,651 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:34:21,021 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-10-14 14:34:21,022 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 173 treesize of output 107 [2024-10-14 14:34:21,134 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:21,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368525746] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:34:21,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:34:21,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2024-10-14 14:34:21,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070568337] [2024-10-14 14:34:21,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:34:21,136 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-14 14:34:21,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:34:21,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-14 14:34:21,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2024-10-14 14:34:21,137 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:34:21,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 74 transitions, 577 flow. Second operand has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 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) [2024-10-14 14:34:21,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:34:21,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:34:21,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:34:21,678 INFO L124 PetriNetUnfolderBase]: 174/334 cut-off events. [2024-10-14 14:34:21,678 INFO L125 PetriNetUnfolderBase]: For 1187/1187 co-relation queries the response was YES. [2024-10-14 14:34:21,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1571 conditions, 334 events. 174/334 cut-off events. For 1187/1187 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1131 event pairs, 25 based on Foata normal form. 3/335 useless extension candidates. Maximal degree in co-relation 1516. Up to 235 conditions per place. [2024-10-14 14:34:21,681 INFO L140 encePairwiseOnDemand]: 10/22 looper letters, 61 selfloop transitions, 23 changer transitions 7/92 dead transitions. [2024-10-14 14:34:21,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 92 transitions, 836 flow [2024-10-14 14:34:21,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-14 14:34:21,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-14 14:34:21,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 91 transitions. [2024-10-14 14:34:21,683 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2024-10-14 14:34:21,683 INFO L175 Difference]: Start difference. First operand has 84 places, 74 transitions, 577 flow. Second operand 13 states and 91 transitions. [2024-10-14 14:34:21,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 92 transitions, 836 flow [2024-10-14 14:34:21,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 92 transitions, 774 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-10-14 14:34:21,692 INFO L231 Difference]: Finished difference. Result has 91 places, 73 transitions, 566 flow [2024-10-14 14:34:21,692 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=515, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=566, PETRI_PLACES=91, PETRI_TRANSITIONS=73} [2024-10-14 14:34:21,693 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 69 predicate places. [2024-10-14 14:34:21,693 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 73 transitions, 566 flow [2024-10-14 14:34:21,693 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 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) [2024-10-14 14:34:21,693 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:34:21,694 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:34:21,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-14 14:34:21,896 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-14 14:34:21,896 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:34:21,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:34:21,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1588593436, now seen corresponding path program 5 times [2024-10-14 14:34:21,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:34:21,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704831232] [2024-10-14 14:34:21,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:34:21,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:34:21,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:34:22,513 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:22,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:34:22,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704831232] [2024-10-14 14:34:22,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704831232] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:34:22,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863425200] [2024-10-14 14:34:22,514 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-14 14:34:22,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:34:22,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:34:22,516 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:34:22,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-14 14:34:22,684 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-10-14 14:34:22,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:34:22,686 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-14 14:34:22,688 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:34:22,770 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:34:22,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-10-14 14:34:22,820 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:22,820 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:34:23,185 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-10-14 14:34:23,185 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 173 treesize of output 107 [2024-10-14 14:34:23,261 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:23,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863425200] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:34:23,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:34:23,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 24 [2024-10-14 14:34:23,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045157024] [2024-10-14 14:34:23,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:34:23,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-14 14:34:23,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:34:23,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-14 14:34:23,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2024-10-14 14:34:23,264 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:34:23,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 73 transitions, 566 flow. Second operand has 24 states, 24 states have (on average 5.166666666666667) internal successors, (124), 24 states have internal predecessors, (124), 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) [2024-10-14 14:34:23,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:34:23,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:34:23,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:34:23,805 INFO L124 PetriNetUnfolderBase]: 171/325 cut-off events. [2024-10-14 14:34:23,806 INFO L125 PetriNetUnfolderBase]: For 1248/1248 co-relation queries the response was YES. [2024-10-14 14:34:23,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1576 conditions, 325 events. 171/325 cut-off events. For 1248/1248 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1076 event pairs, 27 based on Foata normal form. 1/326 useless extension candidates. Maximal degree in co-relation 1519. Up to 216 conditions per place. [2024-10-14 14:34:23,810 INFO L140 encePairwiseOnDemand]: 11/22 looper letters, 60 selfloop transitions, 27 changer transitions 4/92 dead transitions. [2024-10-14 14:34:23,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 92 transitions, 833 flow [2024-10-14 14:34:23,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-14 14:34:23,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-14 14:34:23,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 91 transitions. [2024-10-14 14:34:23,812 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2024-10-14 14:34:23,812 INFO L175 Difference]: Start difference. First operand has 91 places, 73 transitions, 566 flow. Second operand 13 states and 91 transitions. [2024-10-14 14:34:23,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 92 transitions, 833 flow [2024-10-14 14:34:23,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 92 transitions, 770 flow, removed 5 selfloop flow, removed 13 redundant places. [2024-10-14 14:34:23,820 INFO L231 Difference]: Finished difference. Result has 91 places, 73 transitions, 577 flow [2024-10-14 14:34:23,821 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=503, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=577, PETRI_PLACES=91, PETRI_TRANSITIONS=73} [2024-10-14 14:34:23,821 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 69 predicate places. [2024-10-14 14:34:23,822 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 73 transitions, 577 flow [2024-10-14 14:34:23,822 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.166666666666667) internal successors, (124), 24 states have internal predecessors, (124), 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) [2024-10-14 14:34:23,822 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:34:23,822 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:34:23,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-14 14:34:24,023 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-14 14:34:24,024 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:34:24,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:34:24,024 INFO L85 PathProgramCache]: Analyzing trace with hash 2026960210, now seen corresponding path program 6 times [2024-10-14 14:34:24,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:34:24,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526084911] [2024-10-14 14:34:24,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:34:24,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:34:24,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:34:24,713 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:24,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:34:24,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526084911] [2024-10-14 14:34:24,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526084911] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:34:24,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197935349] [2024-10-14 14:34:24,714 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-14 14:34:24,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:34:24,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:34:24,717 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:34:24,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-14 14:34:24,847 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-14 14:34:24,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:34:24,849 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-14 14:34:24,851 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:34:24,981 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:34:24,981 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 19 [2024-10-14 14:34:25,009 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:25,009 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:34:25,328 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-10-14 14:34:25,328 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 118 treesize of output 79 [2024-10-14 14:34:25,365 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:25,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197935349] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:34:25,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:34:25,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 22 [2024-10-14 14:34:25,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052181651] [2024-10-14 14:34:25,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:34:25,366 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-14 14:34:25,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:34:25,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-14 14:34:25,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2024-10-14 14:34:25,367 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:34:25,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 73 transitions, 577 flow. Second operand has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 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) [2024-10-14 14:34:25,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:34:25,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:34:25,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:34:26,128 INFO L124 PetriNetUnfolderBase]: 227/426 cut-off events. [2024-10-14 14:34:26,129 INFO L125 PetriNetUnfolderBase]: For 2143/2143 co-relation queries the response was YES. [2024-10-14 14:34:26,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2196 conditions, 426 events. 227/426 cut-off events. For 2143/2143 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1584 event pairs, 29 based on Foata normal form. 1/427 useless extension candidates. Maximal degree in co-relation 2140. Up to 161 conditions per place. [2024-10-14 14:34:26,135 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 78 selfloop transitions, 37 changer transitions 3/119 dead transitions. [2024-10-14 14:34:26,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 119 transitions, 1172 flow [2024-10-14 14:34:26,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-14 14:34:26,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-14 14:34:26,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 104 transitions. [2024-10-14 14:34:26,137 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.33766233766233766 [2024-10-14 14:34:26,137 INFO L175 Difference]: Start difference. First operand has 91 places, 73 transitions, 577 flow. Second operand 14 states and 104 transitions. [2024-10-14 14:34:26,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 119 transitions, 1172 flow [2024-10-14 14:34:26,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 119 transitions, 1091 flow, removed 7 selfloop flow, removed 12 redundant places. [2024-10-14 14:34:26,145 INFO L231 Difference]: Finished difference. Result has 96 places, 85 transitions, 760 flow [2024-10-14 14:34:26,146 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=760, PETRI_PLACES=96, PETRI_TRANSITIONS=85} [2024-10-14 14:34:26,147 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 74 predicate places. [2024-10-14 14:34:26,147 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 85 transitions, 760 flow [2024-10-14 14:34:26,147 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 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) [2024-10-14 14:34:26,147 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:34:26,147 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:34:26,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-14 14:34:26,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-14 14:34:26,352 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:34:26,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:34:26,352 INFO L85 PathProgramCache]: Analyzing trace with hash 24937234, now seen corresponding path program 7 times [2024-10-14 14:34:26,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:34:26,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787979267] [2024-10-14 14:34:26,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:34:26,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:34:26,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:34:27,094 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:27,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:34:27,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787979267] [2024-10-14 14:34:27,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787979267] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:34:27,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839599887] [2024-10-14 14:34:27,095 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-14 14:34:27,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:34:27,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:34:27,096 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:34:27,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-14 14:34:27,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:34:27,216 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-14 14:34:27,217 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:34:27,303 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:34:27,303 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 23 [2024-10-14 14:34:27,337 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:27,337 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:34:27,606 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-10-14 14:34:27,607 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 173 treesize of output 107 [2024-10-14 14:34:27,678 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:27,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839599887] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:34:27,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:34:27,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 22 [2024-10-14 14:34:27,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003722116] [2024-10-14 14:34:27,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:34:27,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-14 14:34:27,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:34:27,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-14 14:34:27,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2024-10-14 14:34:27,680 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:34:27,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 85 transitions, 760 flow. Second operand has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 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) [2024-10-14 14:34:27,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:34:27,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:34:27,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:34:28,170 INFO L124 PetriNetUnfolderBase]: 238/448 cut-off events. [2024-10-14 14:34:28,171 INFO L125 PetriNetUnfolderBase]: For 2706/2706 co-relation queries the response was YES. [2024-10-14 14:34:28,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2479 conditions, 448 events. 238/448 cut-off events. For 2706/2706 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1701 event pairs, 64 based on Foata normal form. 4/452 useless extension candidates. Maximal degree in co-relation 2420. Up to 337 conditions per place. [2024-10-14 14:34:28,175 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 74 selfloop transitions, 27 changer transitions 8/110 dead transitions. [2024-10-14 14:34:28,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 110 transitions, 1138 flow [2024-10-14 14:34:28,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-14 14:34:28,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-14 14:34:28,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 91 transitions. [2024-10-14 14:34:28,178 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2024-10-14 14:34:28,178 INFO L175 Difference]: Start difference. First operand has 96 places, 85 transitions, 760 flow. Second operand 13 states and 91 transitions. [2024-10-14 14:34:28,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 110 transitions, 1138 flow [2024-10-14 14:34:28,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 110 transitions, 997 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-10-14 14:34:28,191 INFO L231 Difference]: Finished difference. Result has 104 places, 92 transitions, 781 flow [2024-10-14 14:34:28,192 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=633, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=781, PETRI_PLACES=104, PETRI_TRANSITIONS=92} [2024-10-14 14:34:28,192 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 82 predicate places. [2024-10-14 14:34:28,192 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 92 transitions, 781 flow [2024-10-14 14:34:28,193 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 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) [2024-10-14 14:34:28,193 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:34:28,193 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:34:28,211 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-14 14:34:28,393 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-14 14:34:28,394 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:34:28,394 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:34:28,394 INFO L85 PathProgramCache]: Analyzing trace with hash -933415756, now seen corresponding path program 8 times [2024-10-14 14:34:28,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:34:28,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473519708] [2024-10-14 14:34:28,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:34:28,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:34:28,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:34:29,148 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:29,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:34:29,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473519708] [2024-10-14 14:34:29,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473519708] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:34:29,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507876177] [2024-10-14 14:34:29,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 14:34:29,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:34:29,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:34:29,151 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:34:29,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-14 14:34:29,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 14:34:29,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:34:29,291 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-14 14:34:29,293 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:34:29,408 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:34:29,408 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 19 [2024-10-14 14:34:29,442 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:29,442 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:34:29,732 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-10-14 14:34:29,733 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 173 treesize of output 107 [2024-10-14 14:34:29,811 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:29,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507876177] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:34:29,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:34:29,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2024-10-14 14:34:29,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759495436] [2024-10-14 14:34:29,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:34:29,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-14 14:34:29,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:34:29,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-14 14:34:29,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2024-10-14 14:34:29,813 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:34:29,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 92 transitions, 781 flow. Second operand has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 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) [2024-10-14 14:34:29,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:34:29,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:34:29,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:34:30,410 INFO L124 PetriNetUnfolderBase]: 238/447 cut-off events. [2024-10-14 14:34:30,410 INFO L125 PetriNetUnfolderBase]: For 2737/2737 co-relation queries the response was YES. [2024-10-14 14:34:30,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2413 conditions, 447 events. 238/447 cut-off events. For 2737/2737 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1702 event pairs, 61 based on Foata normal form. 3/450 useless extension candidates. Maximal degree in co-relation 2352. Up to 336 conditions per place. [2024-10-14 14:34:30,416 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 79 selfloop transitions, 28 changer transitions 7/115 dead transitions. [2024-10-14 14:34:30,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 115 transitions, 1186 flow [2024-10-14 14:34:30,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-14 14:34:30,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-14 14:34:30,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 90 transitions. [2024-10-14 14:34:30,419 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3146853146853147 [2024-10-14 14:34:30,419 INFO L175 Difference]: Start difference. First operand has 104 places, 92 transitions, 781 flow. Second operand 13 states and 90 transitions. [2024-10-14 14:34:30,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 115 transitions, 1186 flow [2024-10-14 14:34:30,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 115 transitions, 1125 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-10-14 14:34:30,429 INFO L231 Difference]: Finished difference. Result has 112 places, 97 transitions, 874 flow [2024-10-14 14:34:30,431 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=724, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=874, PETRI_PLACES=112, PETRI_TRANSITIONS=97} [2024-10-14 14:34:30,432 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 90 predicate places. [2024-10-14 14:34:30,432 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 97 transitions, 874 flow [2024-10-14 14:34:30,432 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 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) [2024-10-14 14:34:30,432 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:34:30,432 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:34:30,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-14 14:34:30,636 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-14 14:34:30,637 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:34:30,637 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:34:30,637 INFO L85 PathProgramCache]: Analyzing trace with hash -73946580, now seen corresponding path program 9 times [2024-10-14 14:34:30,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:34:30,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556370065] [2024-10-14 14:34:30,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:34:30,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:34:30,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:34:31,282 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:31,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:34:31,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556370065] [2024-10-14 14:34:31,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556370065] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:34:31,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797426460] [2024-10-14 14:34:31,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 14:34:31,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:34:31,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:34:31,287 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:34:31,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-14 14:34:31,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-14 14:34:31,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:34:31,406 INFO L255 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-14 14:34:31,407 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:34:31,491 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:34:31,491 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 19 [2024-10-14 14:34:31,548 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:31,548 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:34:31,884 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-10-14 14:34:31,885 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 173 treesize of output 107 [2024-10-14 14:34:31,973 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:31,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797426460] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:34:31,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:34:31,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 21 [2024-10-14 14:34:31,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079665183] [2024-10-14 14:34:31,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:34:31,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-14 14:34:31,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:34:31,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-14 14:34:31,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2024-10-14 14:34:31,976 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:34:31,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 97 transitions, 874 flow. Second operand has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 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) [2024-10-14 14:34:31,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:34:31,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:34:31,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:34:32,369 INFO L124 PetriNetUnfolderBase]: 234/439 cut-off events. [2024-10-14 14:34:32,369 INFO L125 PetriNetUnfolderBase]: For 2894/2894 co-relation queries the response was YES. [2024-10-14 14:34:32,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2453 conditions, 439 events. 234/439 cut-off events. For 2894/2894 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1635 event pairs, 62 based on Foata normal form. 1/440 useless extension candidates. Maximal degree in co-relation 2389. Up to 328 conditions per place. [2024-10-14 14:34:32,373 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 80 selfloop transitions, 29 changer transitions 3/113 dead transitions. [2024-10-14 14:34:32,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 113 transitions, 1193 flow [2024-10-14 14:34:32,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-14 14:34:32,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-14 14:34:32,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 84 transitions. [2024-10-14 14:34:32,374 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2024-10-14 14:34:32,374 INFO L175 Difference]: Start difference. First operand has 112 places, 97 transitions, 874 flow. Second operand 12 states and 84 transitions. [2024-10-14 14:34:32,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 113 transitions, 1193 flow [2024-10-14 14:34:32,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 113 transitions, 1112 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-10-14 14:34:32,383 INFO L231 Difference]: Finished difference. Result has 113 places, 98 transitions, 878 flow [2024-10-14 14:34:32,383 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=878, PETRI_PLACES=113, PETRI_TRANSITIONS=98} [2024-10-14 14:34:32,383 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 91 predicate places. [2024-10-14 14:34:32,384 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 98 transitions, 878 flow [2024-10-14 14:34:32,384 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 21 states have internal predecessors, (106), 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) [2024-10-14 14:34:32,384 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:34:32,384 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:34:32,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-14 14:34:32,584 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-14 14:34:32,585 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:34:32,585 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:34:32,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1655100754, now seen corresponding path program 10 times [2024-10-14 14:34:32,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:34:32,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106910643] [2024-10-14 14:34:32,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:34:32,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:34:32,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:34:33,066 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:33,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:34:33,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106910643] [2024-10-14 14:34:33,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106910643] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:34:33,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640029931] [2024-10-14 14:34:33,067 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 14:34:33,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:34:33,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:34:33,069 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:34:33,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-14 14:34:33,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 14:34:33,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:34:33,199 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-14 14:34:33,200 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:34:33,242 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:34:33,242 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 23 [2024-10-14 14:34:33,257 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:33,258 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:34:33,510 INFO L349 Elim1Store]: treesize reduction 15, result has 80.5 percent of original size [2024-10-14 14:34:33,510 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 173 treesize of output 107 [2024-10-14 14:34:33,587 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:33,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640029931] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:34:33,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:34:33,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 19 [2024-10-14 14:34:33,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232117999] [2024-10-14 14:34:33,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:34:33,588 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-14 14:34:33,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:34:33,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-14 14:34:33,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2024-10-14 14:34:33,589 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:34:33,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 98 transitions, 878 flow. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 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) [2024-10-14 14:34:33,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:34:33,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:34:33,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:34:33,950 INFO L124 PetriNetUnfolderBase]: 234/437 cut-off events. [2024-10-14 14:34:33,950 INFO L125 PetriNetUnfolderBase]: For 2812/2812 co-relation queries the response was YES. [2024-10-14 14:34:33,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2433 conditions, 437 events. 234/437 cut-off events. For 2812/2812 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1616 event pairs, 65 based on Foata normal form. 1/438 useless extension candidates. Maximal degree in co-relation 2370. Up to 330 conditions per place. [2024-10-14 14:34:33,954 INFO L140 encePairwiseOnDemand]: 13/22 looper letters, 82 selfloop transitions, 27 changer transitions 1/111 dead transitions. [2024-10-14 14:34:33,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 111 transitions, 1169 flow [2024-10-14 14:34:33,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-14 14:34:33,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-14 14:34:33,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 77 transitions. [2024-10-14 14:34:33,955 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2024-10-14 14:34:33,956 INFO L175 Difference]: Start difference. First operand has 113 places, 98 transitions, 878 flow. Second operand 11 states and 77 transitions. [2024-10-14 14:34:33,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 111 transitions, 1169 flow [2024-10-14 14:34:33,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 111 transitions, 1101 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-10-14 14:34:33,965 INFO L231 Difference]: Finished difference. Result has 114 places, 99 transitions, 888 flow [2024-10-14 14:34:33,965 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=888, PETRI_PLACES=114, PETRI_TRANSITIONS=99} [2024-10-14 14:34:33,966 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 92 predicate places. [2024-10-14 14:34:33,966 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 99 transitions, 888 flow [2024-10-14 14:34:33,966 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 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) [2024-10-14 14:34:33,966 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:34:33,966 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:34:33,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-14 14:34:34,167 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:34:34,167 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:34:34,168 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:34:34,168 INFO L85 PathProgramCache]: Analyzing trace with hash -938964483, now seen corresponding path program 11 times [2024-10-14 14:34:34,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:34:34,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646346012] [2024-10-14 14:34:34,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:34:34,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:34:34,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:34:34,780 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:34,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:34:34,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646346012] [2024-10-14 14:34:34,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646346012] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:34:34,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762622005] [2024-10-14 14:34:34,781 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-14 14:34:34,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:34:34,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:34:34,783 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:34:34,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-14 14:34:34,963 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-10-14 14:34:34,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:34:34,970 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-14 14:34:34,972 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:34:35,101 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:35,101 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:34:35,230 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-10-14 14:34:35,230 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 32 treesize of output 48 [2024-10-14 14:34:35,252 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:35,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762622005] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:34:35,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:34:35,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 21 [2024-10-14 14:34:35,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308687017] [2024-10-14 14:34:35,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:34:35,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-14 14:34:35,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:34:35,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-14 14:34:35,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2024-10-14 14:34:35,255 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:34:35,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 99 transitions, 888 flow. Second operand has 21 states, 21 states have (on average 5.333333333333333) internal successors, (112), 21 states have internal predecessors, (112), 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) [2024-10-14 14:34:35,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:34:35,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:34:35,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:34:35,560 INFO L124 PetriNetUnfolderBase]: 248/461 cut-off events. [2024-10-14 14:34:35,560 INFO L125 PetriNetUnfolderBase]: For 3060/3060 co-relation queries the response was YES. [2024-10-14 14:34:35,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2599 conditions, 461 events. 248/461 cut-off events. For 3060/3060 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1774 event pairs, 33 based on Foata normal form. 5/466 useless extension candidates. Maximal degree in co-relation 2535. Up to 199 conditions per place. [2024-10-14 14:34:35,563 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 93 selfloop transitions, 37 changer transitions 0/131 dead transitions. [2024-10-14 14:34:35,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 131 transitions, 1400 flow [2024-10-14 14:34:35,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 14:34:35,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-14 14:34:35,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 84 transitions. [2024-10-14 14:34:35,564 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38181818181818183 [2024-10-14 14:34:35,564 INFO L175 Difference]: Start difference. First operand has 114 places, 99 transitions, 888 flow. Second operand 10 states and 84 transitions. [2024-10-14 14:34:35,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 131 transitions, 1400 flow [2024-10-14 14:34:35,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 131 transitions, 1342 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-10-14 14:34:35,575 INFO L231 Difference]: Finished difference. Result has 116 places, 101 transitions, 948 flow [2024-10-14 14:34:35,575 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=832, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=948, PETRI_PLACES=116, PETRI_TRANSITIONS=101} [2024-10-14 14:34:35,575 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 94 predicate places. [2024-10-14 14:34:35,575 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 101 transitions, 948 flow [2024-10-14 14:34:35,576 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.333333333333333) internal successors, (112), 21 states have internal predecessors, (112), 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) [2024-10-14 14:34:35,576 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:34:35,576 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:34:35,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-10-14 14:34:35,776 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:34:35,777 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:34:35,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:34:35,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1048426644, now seen corresponding path program 12 times [2024-10-14 14:34:35,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:34:35,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534473562] [2024-10-14 14:34:35,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:34:35,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:34:35,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:34:36,304 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:36,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:34:36,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534473562] [2024-10-14 14:34:36,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534473562] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:34:36,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478674646] [2024-10-14 14:34:36,304 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-14 14:34:36,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:34:36,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:34:36,306 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:34:36,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-14 14:34:36,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-14 14:34:36,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:34:36,430 INFO L255 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-14 14:34:36,431 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:34:36,628 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:36,628 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:34:36,751 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-10-14 14:34:36,751 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 63 treesize of output 67 [2024-10-14 14:34:36,797 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:36,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478674646] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:34:36,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:34:36,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2024-10-14 14:34:36,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641520110] [2024-10-14 14:34:36,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:34:36,798 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-14 14:34:36,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:34:36,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-14 14:34:36,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2024-10-14 14:34:36,799 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:34:36,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 101 transitions, 948 flow. Second operand has 19 states, 19 states have (on average 5.315789473684211) internal successors, (101), 19 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) [2024-10-14 14:34:36,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:34:36,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:34:36,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:34:37,088 INFO L124 PetriNetUnfolderBase]: 251/474 cut-off events. [2024-10-14 14:34:37,089 INFO L125 PetriNetUnfolderBase]: For 3461/3461 co-relation queries the response was YES. [2024-10-14 14:34:37,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2726 conditions, 474 events. 251/474 cut-off events. For 3461/3461 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 1898 event pairs, 44 based on Foata normal form. 3/477 useless extension candidates. Maximal degree in co-relation 2660. Up to 183 conditions per place. [2024-10-14 14:34:37,094 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 89 selfloop transitions, 36 changer transitions 14/140 dead transitions. [2024-10-14 14:34:37,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 140 transitions, 1525 flow [2024-10-14 14:34:37,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-14 14:34:37,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-14 14:34:37,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 77 transitions. [2024-10-14 14:34:37,096 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-10-14 14:34:37,096 INFO L175 Difference]: Start difference. First operand has 116 places, 101 transitions, 948 flow. Second operand 9 states and 77 transitions. [2024-10-14 14:34:37,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 140 transitions, 1525 flow [2024-10-14 14:34:37,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 140 transitions, 1411 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-10-14 14:34:37,107 INFO L231 Difference]: Finished difference. Result has 120 places, 102 transitions, 958 flow [2024-10-14 14:34:37,107 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=836, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=958, PETRI_PLACES=120, PETRI_TRANSITIONS=102} [2024-10-14 14:34:37,108 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 98 predicate places. [2024-10-14 14:34:37,108 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 102 transitions, 958 flow [2024-10-14 14:34:37,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.315789473684211) internal successors, (101), 19 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) [2024-10-14 14:34:37,108 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:34:37,108 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:34:37,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-10-14 14:34:37,309 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:34:37,309 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:34:37,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:34:37,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1740738131, now seen corresponding path program 13 times [2024-10-14 14:34:37,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:34:37,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395604267] [2024-10-14 14:34:37,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:34:37,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:34:37,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:34:37,851 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:37,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:34:37,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395604267] [2024-10-14 14:34:37,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395604267] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:34:37,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678166445] [2024-10-14 14:34:37,852 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-14 14:34:37,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:34:37,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:34:37,854 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:34:37,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-14 14:34:37,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:34:37,995 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-14 14:34:37,996 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:34:38,076 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:38,076 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:34:38,194 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-10-14 14:34:38,195 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 32 treesize of output 48 [2024-10-14 14:34:38,203 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:38,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678166445] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:34:38,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:34:38,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-10-14 14:34:38,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854697703] [2024-10-14 14:34:38,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:34:38,204 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-14 14:34:38,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:34:38,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-14 14:34:38,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2024-10-14 14:34:38,204 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:34:38,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 102 transitions, 958 flow. Second operand has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 19 states have internal predecessors, (99), 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) [2024-10-14 14:34:38,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:34:38,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:34:38,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:34:38,596 INFO L124 PetriNetUnfolderBase]: 273/506 cut-off events. [2024-10-14 14:34:38,597 INFO L125 PetriNetUnfolderBase]: For 3871/3871 co-relation queries the response was YES. [2024-10-14 14:34:38,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3002 conditions, 506 events. 273/506 cut-off events. For 3871/3871 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2032 event pairs, 30 based on Foata normal form. 5/511 useless extension candidates. Maximal degree in co-relation 2934. Up to 189 conditions per place. [2024-10-14 14:34:38,602 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 98 selfloop transitions, 43 changer transitions 0/142 dead transitions. [2024-10-14 14:34:38,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 142 transitions, 1563 flow [2024-10-14 14:34:38,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-14 14:34:38,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-14 14:34:38,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 100 transitions. [2024-10-14 14:34:38,604 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3787878787878788 [2024-10-14 14:34:38,604 INFO L175 Difference]: Start difference. First operand has 120 places, 102 transitions, 958 flow. Second operand 12 states and 100 transitions. [2024-10-14 14:34:38,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 142 transitions, 1563 flow [2024-10-14 14:34:38,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 142 transitions, 1459 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-10-14 14:34:38,616 INFO L231 Difference]: Finished difference. Result has 126 places, 107 transitions, 1038 flow [2024-10-14 14:34:38,616 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=868, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1038, PETRI_PLACES=126, PETRI_TRANSITIONS=107} [2024-10-14 14:34:38,616 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 104 predicate places. [2024-10-14 14:34:38,616 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 107 transitions, 1038 flow [2024-10-14 14:34:38,617 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 19 states have internal predecessors, (99), 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) [2024-10-14 14:34:38,617 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:34:38,617 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:34:38,630 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-10-14 14:34:38,817 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:34:38,817 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:34:38,818 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:34:38,818 INFO L85 PathProgramCache]: Analyzing trace with hash -791224846, now seen corresponding path program 14 times [2024-10-14 14:34:38,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:34:38,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830847579] [2024-10-14 14:34:38,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:34:38,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:34:38,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:34:39,475 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:39,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:34:39,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830847579] [2024-10-14 14:34:39,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830847579] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:34:39,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484762705] [2024-10-14 14:34:39,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 14:34:39,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:34:39,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:34:39,477 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:34:39,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-14 14:34:39,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 14:34:39,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:34:39,643 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-14 14:34:39,645 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:34:39,850 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:34:39,851 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 65 treesize of output 41 [2024-10-14 14:34:39,891 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:39,892 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:34:40,037 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-10-14 14:34:40,038 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 63 treesize of output 67 [2024-10-14 14:34:40,080 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:40,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484762705] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:34:40,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:34:40,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 21 [2024-10-14 14:34:40,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519195318] [2024-10-14 14:34:40,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:34:40,081 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-14 14:34:40,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:34:40,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-14 14:34:40,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2024-10-14 14:34:40,082 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:34:40,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 107 transitions, 1038 flow. Second operand has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 21 states have internal predecessors, (110), 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) [2024-10-14 14:34:40,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:34:40,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:34:40,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:34:40,944 INFO L124 PetriNetUnfolderBase]: 289/551 cut-off events. [2024-10-14 14:34:40,944 INFO L125 PetriNetUnfolderBase]: For 4468/4468 co-relation queries the response was YES. [2024-10-14 14:34:40,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3250 conditions, 551 events. 289/551 cut-off events. For 4468/4468 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2330 event pairs, 61 based on Foata normal form. 6/557 useless extension candidates. Maximal degree in co-relation 3181. Up to 235 conditions per place. [2024-10-14 14:34:40,950 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 104 selfloop transitions, 41 changer transitions 6/152 dead transitions. [2024-10-14 14:34:40,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 152 transitions, 1664 flow [2024-10-14 14:34:40,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-14 14:34:40,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-14 14:34:40,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 120 transitions. [2024-10-14 14:34:40,951 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38961038961038963 [2024-10-14 14:34:40,952 INFO L175 Difference]: Start difference. First operand has 126 places, 107 transitions, 1038 flow. Second operand 14 states and 120 transitions. [2024-10-14 14:34:40,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 152 transitions, 1664 flow [2024-10-14 14:34:40,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 152 transitions, 1584 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-10-14 14:34:40,966 INFO L231 Difference]: Finished difference. Result has 135 places, 109 transitions, 1090 flow [2024-10-14 14:34:40,966 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=959, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1090, PETRI_PLACES=135, PETRI_TRANSITIONS=109} [2024-10-14 14:34:40,966 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 113 predicate places. [2024-10-14 14:34:40,967 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 109 transitions, 1090 flow [2024-10-14 14:34:40,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 21 states have internal predecessors, (110), 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) [2024-10-14 14:34:40,967 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:34:40,967 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:34:40,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-10-14 14:34:41,167 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:34:41,168 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:34:41,168 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:34:41,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1283844297, now seen corresponding path program 15 times [2024-10-14 14:34:41,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:34:41,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545628839] [2024-10-14 14:34:41,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:34:41,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:34:41,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:34:41,736 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:41,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:34:41,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545628839] [2024-10-14 14:34:41,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545628839] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:34:41,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713929597] [2024-10-14 14:34:41,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 14:34:41,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:34:41,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:34:41,737 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:34:41,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-14 14:34:41,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-14 14:34:41,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:34:41,868 INFO L255 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-10-14 14:34:41,869 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:34:42,019 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:34:42,019 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 46 treesize of output 30 [2024-10-14 14:34:42,082 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:42,082 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:34:42,254 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-10-14 14:34:42,254 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 32 treesize of output 48 [2024-10-14 14:34:42,272 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:42,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713929597] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:34:42,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:34:42,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8] total 21 [2024-10-14 14:34:42,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127703530] [2024-10-14 14:34:42,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:34:42,273 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-14 14:34:42,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:34:42,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-14 14:34:42,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2024-10-14 14:34:42,274 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:34:42,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 109 transitions, 1090 flow. Second operand has 21 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:34:42,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:34:42,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:34:42,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:34:43,509 INFO L124 PetriNetUnfolderBase]: 347/689 cut-off events. [2024-10-14 14:34:43,509 INFO L125 PetriNetUnfolderBase]: For 5557/5557 co-relation queries the response was YES. [2024-10-14 14:34:43,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4076 conditions, 689 events. 347/689 cut-off events. For 5557/5557 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3272 event pairs, 18 based on Foata normal form. 13/702 useless extension candidates. Maximal degree in co-relation 4004. Up to 256 conditions per place. [2024-10-14 14:34:43,515 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 129 selfloop transitions, 77 changer transitions 8/215 dead transitions. [2024-10-14 14:34:43,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 215 transitions, 2356 flow [2024-10-14 14:34:43,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-14 14:34:43,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-10-14 14:34:43,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 199 transitions. [2024-10-14 14:34:43,517 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3768939393939394 [2024-10-14 14:34:43,517 INFO L175 Difference]: Start difference. First operand has 135 places, 109 transitions, 1090 flow. Second operand 24 states and 199 transitions. [2024-10-14 14:34:43,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 215 transitions, 2356 flow [2024-10-14 14:34:43,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 215 transitions, 2225 flow, removed 14 selfloop flow, removed 11 redundant places. [2024-10-14 14:34:43,540 INFO L231 Difference]: Finished difference. Result has 156 places, 136 transitions, 1576 flow [2024-10-14 14:34:43,540 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=979, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1576, PETRI_PLACES=156, PETRI_TRANSITIONS=136} [2024-10-14 14:34:43,541 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 134 predicate places. [2024-10-14 14:34:43,541 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 136 transitions, 1576 flow [2024-10-14 14:34:43,541 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.142857142857143) internal successors, (108), 21 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:34:43,541 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:34:43,541 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:34:43,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-10-14 14:34:43,742 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:34:43,742 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:34:43,743 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:34:43,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1643558270, now seen corresponding path program 16 times [2024-10-14 14:34:43,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:34:43,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112333355] [2024-10-14 14:34:43,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:34:43,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:34:43,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:34:44,309 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:44,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:34:44,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112333355] [2024-10-14 14:34:44,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112333355] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:34:44,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135303757] [2024-10-14 14:34:44,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 14:34:44,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:34:44,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:34:44,311 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:34:44,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-10-14 14:34:44,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 14:34:44,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:34:44,449 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-14 14:34:44,450 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:34:44,538 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:44,539 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:34:44,646 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-10-14 14:34:44,647 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 63 treesize of output 67 [2024-10-14 14:34:44,665 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:44,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135303757] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:34:44,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:34:44,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-10-14 14:34:44,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716453446] [2024-10-14 14:34:44,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:34:44,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-14 14:34:44,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:34:44,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-14 14:34:44,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2024-10-14 14:34:44,666 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:34:44,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 136 transitions, 1576 flow. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 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) [2024-10-14 14:34:44,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:34:44,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:34:44,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:34:44,976 INFO L124 PetriNetUnfolderBase]: 334/651 cut-off events. [2024-10-14 14:34:44,976 INFO L125 PetriNetUnfolderBase]: For 7224/7224 co-relation queries the response was YES. [2024-10-14 14:34:44,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4458 conditions, 651 events. 334/651 cut-off events. For 7224/7224 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 2963 event pairs, 84 based on Foata normal form. 3/654 useless extension candidates. Maximal degree in co-relation 4376. Up to 329 conditions per place. [2024-10-14 14:34:44,985 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 111 selfloop transitions, 38 changer transitions 8/158 dead transitions. [2024-10-14 14:34:44,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 158 transitions, 2086 flow [2024-10-14 14:34:44,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-14 14:34:44,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-14 14:34:44,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 75 transitions. [2024-10-14 14:34:44,987 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3787878787878788 [2024-10-14 14:34:44,987 INFO L175 Difference]: Start difference. First operand has 156 places, 136 transitions, 1576 flow. Second operand 9 states and 75 transitions. [2024-10-14 14:34:44,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 158 transitions, 2086 flow [2024-10-14 14:34:45,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 158 transitions, 1825 flow, removed 87 selfloop flow, removed 11 redundant places. [2024-10-14 14:34:45,008 INFO L231 Difference]: Finished difference. Result has 154 places, 134 transitions, 1388 flow [2024-10-14 14:34:45,008 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1331, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1388, PETRI_PLACES=154, PETRI_TRANSITIONS=134} [2024-10-14 14:34:45,008 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 132 predicate places. [2024-10-14 14:34:45,009 INFO L471 AbstractCegarLoop]: Abstraction has has 154 places, 134 transitions, 1388 flow [2024-10-14 14:34:45,009 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 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) [2024-10-14 14:34:45,009 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:34:45,009 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:34:45,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-10-14 14:34:45,209 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-10-14 14:34:45,210 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:34:45,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:34:45,210 INFO L85 PathProgramCache]: Analyzing trace with hash -358502965, now seen corresponding path program 17 times [2024-10-14 14:34:45,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:34:45,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148430014] [2024-10-14 14:34:45,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:34:45,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:34:45,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:34:45,793 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:45,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:34:45,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148430014] [2024-10-14 14:34:45,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148430014] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:34:45,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896633435] [2024-10-14 14:34:45,794 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-14 14:34:45,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:34:45,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:34:45,796 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:34:45,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-10-14 14:34:46,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-10-14 14:34:46,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:34:46,018 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-10-14 14:34:46,019 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:34:46,151 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:34:46,151 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 46 treesize of output 30 [2024-10-14 14:34:46,198 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:46,198 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:34:46,388 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-10-14 14:34:46,388 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 32 treesize of output 48 [2024-10-14 14:34:46,421 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:46,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896633435] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:34:46,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:34:46,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2024-10-14 14:34:46,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427044357] [2024-10-14 14:34:46,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:34:46,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-14 14:34:46,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:34:46,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-14 14:34:46,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2024-10-14 14:34:46,424 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:34:46,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 134 transitions, 1388 flow. Second operand has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2024-10-14 14:34:46,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:34:46,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:34:46,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:34:47,103 INFO L124 PetriNetUnfolderBase]: 316/589 cut-off events. [2024-10-14 14:34:47,104 INFO L125 PetriNetUnfolderBase]: For 5871/5871 co-relation queries the response was YES. [2024-10-14 14:34:47,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3823 conditions, 589 events. 316/589 cut-off events. For 5871/5871 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2494 event pairs, 20 based on Foata normal form. 10/599 useless extension candidates. Maximal degree in co-relation 3740. Up to 209 conditions per place. [2024-10-14 14:34:47,109 INFO L140 encePairwiseOnDemand]: 13/22 looper letters, 115 selfloop transitions, 60 changer transitions 6/182 dead transitions. [2024-10-14 14:34:47,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 182 transitions, 2207 flow [2024-10-14 14:34:47,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-14 14:34:47,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-10-14 14:34:47,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 145 transitions. [2024-10-14 14:34:47,111 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.34688995215311 [2024-10-14 14:34:47,111 INFO L175 Difference]: Start difference. First operand has 154 places, 134 transitions, 1388 flow. Second operand 19 states and 145 transitions. [2024-10-14 14:34:47,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 182 transitions, 2207 flow [2024-10-14 14:34:47,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 182 transitions, 2083 flow, removed 25 selfloop flow, removed 9 redundant places. [2024-10-14 14:34:47,136 INFO L231 Difference]: Finished difference. Result has 157 places, 130 transitions, 1381 flow [2024-10-14 14:34:47,137 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1247, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1381, PETRI_PLACES=157, PETRI_TRANSITIONS=130} [2024-10-14 14:34:47,137 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 135 predicate places. [2024-10-14 14:34:47,137 INFO L471 AbstractCegarLoop]: Abstraction has has 157 places, 130 transitions, 1381 flow [2024-10-14 14:34:47,138 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0) internal successors, (105), 21 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) [2024-10-14 14:34:47,138 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:34:47,138 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:34:47,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-10-14 14:34:47,338 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-10-14 14:34:47,339 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:34:47,339 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:34:47,339 INFO L85 PathProgramCache]: Analyzing trace with hash -588555722, now seen corresponding path program 18 times [2024-10-14 14:34:47,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:34:47,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895623286] [2024-10-14 14:34:47,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:34:47,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:34:47,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:34:47,903 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:47,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:34:47,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895623286] [2024-10-14 14:34:47,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895623286] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:34:47,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444200112] [2024-10-14 14:34:47,904 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-14 14:34:47,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:34:47,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:34:47,906 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:34:47,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-10-14 14:34:48,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-14 14:34:48,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:34:48,057 INFO L255 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-14 14:34:48,059 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:34:48,224 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-14 14:34:48,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-10-14 14:34:48,229 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:48,229 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:34:48,365 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-10-14 14:34:48,365 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 44 treesize of output 77 [2024-10-14 14:34:48,424 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:48,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444200112] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:34:48,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:34:48,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2024-10-14 14:34:48,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105406852] [2024-10-14 14:34:48,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:34:48,425 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-14 14:34:48,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:34:48,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-14 14:34:48,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2024-10-14 14:34:48,426 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:34:48,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 130 transitions, 1381 flow. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:34:48,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:34:48,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:34:48,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:34:48,747 INFO L124 PetriNetUnfolderBase]: 321/596 cut-off events. [2024-10-14 14:34:48,747 INFO L125 PetriNetUnfolderBase]: For 6115/6115 co-relation queries the response was YES. [2024-10-14 14:34:48,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3893 conditions, 596 events. 321/596 cut-off events. For 6115/6115 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2493 event pairs, 115 based on Foata normal form. 4/600 useless extension candidates. Maximal degree in co-relation 3813. Up to 505 conditions per place. [2024-10-14 14:34:48,754 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 120 selfloop transitions, 24 changer transitions 0/145 dead transitions. [2024-10-14 14:34:48,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 145 transitions, 1826 flow [2024-10-14 14:34:48,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-14 14:34:48,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-14 14:34:48,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 68 transitions. [2024-10-14 14:34:48,755 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3434343434343434 [2024-10-14 14:34:48,756 INFO L175 Difference]: Start difference. First operand has 157 places, 130 transitions, 1381 flow. Second operand 9 states and 68 transitions. [2024-10-14 14:34:48,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 145 transitions, 1826 flow [2024-10-14 14:34:48,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 145 transitions, 1616 flow, removed 20 selfloop flow, removed 22 redundant places. [2024-10-14 14:34:48,774 INFO L231 Difference]: Finished difference. Result has 142 places, 131 transitions, 1253 flow [2024-10-14 14:34:48,775 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1179, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1253, PETRI_PLACES=142, PETRI_TRANSITIONS=131} [2024-10-14 14:34:48,775 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 120 predicate places. [2024-10-14 14:34:48,775 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 131 transitions, 1253 flow [2024-10-14 14:34:48,775 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:34:48,776 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:34:48,776 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:34:48,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-10-14 14:34:48,977 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-10-14 14:34:48,977 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:34:48,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:34:48,978 INFO L85 PathProgramCache]: Analyzing trace with hash 481562002, now seen corresponding path program 19 times [2024-10-14 14:34:48,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:34:48,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213636295] [2024-10-14 14:34:48,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:34:48,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:34:49,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:34:49,513 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:49,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:34:49,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213636295] [2024-10-14 14:34:49,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213636295] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:34:49,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845377468] [2024-10-14 14:34:49,514 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-14 14:34:49,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:34:49,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:34:49,517 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:34:49,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-10-14 14:34:49,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:34:49,688 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-14 14:34:49,689 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:34:49,758 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:34:49,758 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 46 treesize of output 34 [2024-10-14 14:34:49,810 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:49,810 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:34:49,923 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-10-14 14:34:49,923 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 44 treesize of output 77 [2024-10-14 14:34:49,949 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:49,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845377468] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:34:49,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:34:49,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-10-14 14:34:49,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298389807] [2024-10-14 14:34:49,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:34:49,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-14 14:34:49,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:34:49,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-14 14:34:49,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-10-14 14:34:49,951 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:34:49,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 131 transitions, 1253 flow. Second operand has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 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) [2024-10-14 14:34:49,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:34:49,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:34:49,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:34:50,307 INFO L124 PetriNetUnfolderBase]: 333/616 cut-off events. [2024-10-14 14:34:50,307 INFO L125 PetriNetUnfolderBase]: For 5179/5179 co-relation queries the response was YES. [2024-10-14 14:34:50,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3865 conditions, 616 events. 333/616 cut-off events. For 5179/5179 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2592 event pairs, 115 based on Foata normal form. 4/620 useless extension candidates. Maximal degree in co-relation 3791. Up to 505 conditions per place. [2024-10-14 14:34:50,313 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 121 selfloop transitions, 29 changer transitions 0/151 dead transitions. [2024-10-14 14:34:50,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 151 transitions, 1759 flow [2024-10-14 14:34:50,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-14 14:34:50,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-14 14:34:50,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 81 transitions. [2024-10-14 14:34:50,314 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3347107438016529 [2024-10-14 14:34:50,314 INFO L175 Difference]: Start difference. First operand has 142 places, 131 transitions, 1253 flow. Second operand 11 states and 81 transitions. [2024-10-14 14:34:50,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 151 transitions, 1759 flow [2024-10-14 14:34:50,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 151 transitions, 1681 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-10-14 14:34:50,328 INFO L231 Difference]: Finished difference. Result has 146 places, 134 transitions, 1307 flow [2024-10-14 14:34:50,328 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1188, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1307, PETRI_PLACES=146, PETRI_TRANSITIONS=134} [2024-10-14 14:34:50,329 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 124 predicate places. [2024-10-14 14:34:50,329 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 134 transitions, 1307 flow [2024-10-14 14:34:50,329 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 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) [2024-10-14 14:34:50,329 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:34:50,329 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:34:50,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-10-14 14:34:50,530 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:34:50,530 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:34:50,530 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:34:50,530 INFO L85 PathProgramCache]: Analyzing trace with hash 913368344, now seen corresponding path program 20 times [2024-10-14 14:34:50,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:34:50,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179499825] [2024-10-14 14:34:50,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:34:50,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:34:50,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:34:51,104 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:51,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:34:51,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179499825] [2024-10-14 14:34:51,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179499825] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:34:51,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340363925] [2024-10-14 14:34:51,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 14:34:51,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:34:51,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:34:51,107 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:34:51,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-10-14 14:34:51,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 14:34:51,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:34:51,282 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-14 14:34:51,283 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:34:51,425 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:34:51,425 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 65 treesize of output 41 [2024-10-14 14:34:51,468 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:51,468 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:34:51,582 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-10-14 14:34:51,583 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 71 treesize of output 88 [2024-10-14 14:34:51,650 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:51,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340363925] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:34:51,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:34:51,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2024-10-14 14:34:51,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476163071] [2024-10-14 14:34:51,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:34:51,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-14 14:34:51,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:34:51,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-14 14:34:51,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2024-10-14 14:34:51,652 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:34:51,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 134 transitions, 1307 flow. Second operand has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 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) [2024-10-14 14:34:51,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:34:51,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:34:51,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:34:52,036 INFO L124 PetriNetUnfolderBase]: 347/652 cut-off events. [2024-10-14 14:34:52,037 INFO L125 PetriNetUnfolderBase]: For 5669/5669 co-relation queries the response was YES. [2024-10-14 14:34:52,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4093 conditions, 652 events. 347/652 cut-off events. For 5669/5669 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 2843 event pairs, 117 based on Foata normal form. 4/656 useless extension candidates. Maximal degree in co-relation 4018. Up to 509 conditions per place. [2024-10-14 14:34:52,043 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 122 selfloop transitions, 31 changer transitions 0/154 dead transitions. [2024-10-14 14:34:52,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 154 transitions, 1779 flow [2024-10-14 14:34:52,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-14 14:34:52,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-14 14:34:52,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 74 transitions. [2024-10-14 14:34:52,044 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37373737373737376 [2024-10-14 14:34:52,045 INFO L175 Difference]: Start difference. First operand has 146 places, 134 transitions, 1307 flow. Second operand 9 states and 74 transitions. [2024-10-14 14:34:52,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 154 transitions, 1779 flow [2024-10-14 14:34:52,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 154 transitions, 1712 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-10-14 14:34:52,063 INFO L231 Difference]: Finished difference. Result has 147 places, 135 transitions, 1334 flow [2024-10-14 14:34:52,064 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1240, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1334, PETRI_PLACES=147, PETRI_TRANSITIONS=135} [2024-10-14 14:34:52,064 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 125 predicate places. [2024-10-14 14:34:52,065 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 135 transitions, 1334 flow [2024-10-14 14:34:52,065 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 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) [2024-10-14 14:34:52,065 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:34:52,065 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:34:52,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-10-14 14:34:52,266 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-10-14 14:34:52,266 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:34:52,266 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:34:52,266 INFO L85 PathProgramCache]: Analyzing trace with hash 2114018255, now seen corresponding path program 21 times [2024-10-14 14:34:52,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:34:52,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124287968] [2024-10-14 14:34:52,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:34:52,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:34:52,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:34:52,827 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:52,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:34:52,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124287968] [2024-10-14 14:34:52,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124287968] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:34:52,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493089491] [2024-10-14 14:34:52,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 14:34:52,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:34:52,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:34:52,830 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:34:52,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-10-14 14:34:53,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-14 14:34:53,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:34:53,017 INFO L255 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-14 14:34:53,019 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:34:53,226 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:34:53,227 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 65 treesize of output 41 [2024-10-14 14:34:53,281 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:53,281 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:34:53,410 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-10-14 14:34:53,411 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 71 treesize of output 88 [2024-10-14 14:34:53,487 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:53,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493089491] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:34:53,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:34:53,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 21 [2024-10-14 14:34:53,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107361193] [2024-10-14 14:34:53,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:34:53,487 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-14 14:34:53,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:34:53,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-14 14:34:53,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2024-10-14 14:34:53,488 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:34:53,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 135 transitions, 1334 flow. Second operand has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 21 states have internal predecessors, (110), 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) [2024-10-14 14:34:53,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:34:53,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:34:53,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:34:53,823 INFO L124 PetriNetUnfolderBase]: 356/674 cut-off events. [2024-10-14 14:34:53,823 INFO L125 PetriNetUnfolderBase]: For 6177/6177 co-relation queries the response was YES. [2024-10-14 14:34:53,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4238 conditions, 674 events. 356/674 cut-off events. For 6177/6177 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 2984 event pairs, 131 based on Foata normal form. 5/679 useless extension candidates. Maximal degree in co-relation 4162. Up to 564 conditions per place. [2024-10-14 14:34:53,828 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 124 selfloop transitions, 26 changer transitions 0/151 dead transitions. [2024-10-14 14:34:53,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 151 transitions, 1769 flow [2024-10-14 14:34:53,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-14 14:34:53,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-14 14:34:53,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 70 transitions. [2024-10-14 14:34:53,830 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.35353535353535354 [2024-10-14 14:34:53,830 INFO L175 Difference]: Start difference. First operand has 147 places, 135 transitions, 1334 flow. Second operand 9 states and 70 transitions. [2024-10-14 14:34:53,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 151 transitions, 1769 flow [2024-10-14 14:34:53,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 151 transitions, 1699 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-10-14 14:34:53,844 INFO L231 Difference]: Finished difference. Result has 149 places, 136 transitions, 1342 flow [2024-10-14 14:34:53,844 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1264, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1342, PETRI_PLACES=149, PETRI_TRANSITIONS=136} [2024-10-14 14:34:53,844 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 127 predicate places. [2024-10-14 14:34:53,844 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 136 transitions, 1342 flow [2024-10-14 14:34:53,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 21 states have internal predecessors, (110), 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) [2024-10-14 14:34:53,844 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:34:53,845 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:34:53,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-10-14 14:34:54,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:34:54,045 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:34:54,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:34:54,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1749142699, now seen corresponding path program 22 times [2024-10-14 14:34:54,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:34:54,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197023485] [2024-10-14 14:34:54,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:34:54,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:34:54,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:34:54,583 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:54,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:34:54,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197023485] [2024-10-14 14:34:54,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197023485] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:34:54,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786828220] [2024-10-14 14:34:54,584 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 14:34:54,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:34:54,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:34:54,586 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:34:54,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-10-14 14:34:54,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 14:34:54,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:34:54,767 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-14 14:34:54,769 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:34:54,840 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:34:54,841 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 65 treesize of output 45 [2024-10-14 14:34:54,885 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:54,885 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:34:55,037 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-10-14 14:34:55,038 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 44 treesize of output 77 [2024-10-14 14:34:55,087 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:55,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786828220] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:34:55,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:34:55,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-10-14 14:34:55,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209322113] [2024-10-14 14:34:55,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:34:55,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-14 14:34:55,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:34:55,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-14 14:34:55,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2024-10-14 14:34:55,089 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:34:55,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 136 transitions, 1342 flow. Second operand has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 19 states have internal predecessors, (99), 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) [2024-10-14 14:34:55,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:34:55,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:34:55,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:34:55,564 INFO L124 PetriNetUnfolderBase]: 379/723 cut-off events. [2024-10-14 14:34:55,564 INFO L125 PetriNetUnfolderBase]: For 7357/7357 co-relation queries the response was YES. [2024-10-14 14:34:55,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4592 conditions, 723 events. 379/723 cut-off events. For 7357/7357 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3343 event pairs, 128 based on Foata normal form. 5/728 useless extension candidates. Maximal degree in co-relation 4515. Up to 560 conditions per place. [2024-10-14 14:34:55,568 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 137 selfloop transitions, 37 changer transitions 0/175 dead transitions. [2024-10-14 14:34:55,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 175 transitions, 2022 flow [2024-10-14 14:34:55,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-14 14:34:55,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-14 14:34:55,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 112 transitions. [2024-10-14 14:34:55,569 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-10-14 14:34:55,570 INFO L175 Difference]: Start difference. First operand has 149 places, 136 transitions, 1342 flow. Second operand 14 states and 112 transitions. [2024-10-14 14:34:55,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 175 transitions, 2022 flow [2024-10-14 14:34:55,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 175 transitions, 1960 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-10-14 14:34:55,585 INFO L231 Difference]: Finished difference. Result has 158 places, 141 transitions, 1473 flow [2024-10-14 14:34:55,586 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1280, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1473, PETRI_PLACES=158, PETRI_TRANSITIONS=141} [2024-10-14 14:34:55,586 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 136 predicate places. [2024-10-14 14:34:55,586 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 141 transitions, 1473 flow [2024-10-14 14:34:55,586 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 19 states have internal predecessors, (99), 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) [2024-10-14 14:34:55,586 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:34:55,586 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:34:55,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-10-14 14:34:55,787 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-10-14 14:34:55,787 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:34:55,788 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:34:55,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1676819895, now seen corresponding path program 23 times [2024-10-14 14:34:55,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:34:55,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952599856] [2024-10-14 14:34:55,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:34:55,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:34:55,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:34:56,297 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:56,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:34:56,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952599856] [2024-10-14 14:34:56,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952599856] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:34:56,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356746001] [2024-10-14 14:34:56,298 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-14 14:34:56,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:34:56,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:34:56,300 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:34:56,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-10-14 14:34:56,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-10-14 14:34:56,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:34:56,565 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-14 14:34:56,566 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:34:56,669 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:56,670 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:34:56,770 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-10-14 14:34:56,770 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 71 treesize of output 88 [2024-10-14 14:34:56,845 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:56,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356746001] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:34:56,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:34:56,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 21 [2024-10-14 14:34:56,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223436140] [2024-10-14 14:34:56,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:34:56,846 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-14 14:34:56,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:34:56,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-14 14:34:56,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2024-10-14 14:34:56,847 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:34:56,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 141 transitions, 1473 flow. Second operand has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 21 states have internal predecessors, (110), 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) [2024-10-14 14:34:56,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:34:56,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:34:56,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:34:57,250 INFO L124 PetriNetUnfolderBase]: 375/711 cut-off events. [2024-10-14 14:34:57,254 INFO L125 PetriNetUnfolderBase]: For 7570/7570 co-relation queries the response was YES. [2024-10-14 14:34:57,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4661 conditions, 711 events. 375/711 cut-off events. For 7570/7570 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3221 event pairs, 150 based on Foata normal form. 2/713 useless extension candidates. Maximal degree in co-relation 4581. Up to 623 conditions per place. [2024-10-14 14:34:57,261 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 124 selfloop transitions, 23 changer transitions 4/152 dead transitions. [2024-10-14 14:34:57,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 152 transitions, 1867 flow [2024-10-14 14:34:57,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-14 14:34:57,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-14 14:34:57,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 63 transitions. [2024-10-14 14:34:57,262 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2024-10-14 14:34:57,262 INFO L175 Difference]: Start difference. First operand has 158 places, 141 transitions, 1473 flow. Second operand 9 states and 63 transitions. [2024-10-14 14:34:57,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 152 transitions, 1867 flow [2024-10-14 14:34:57,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 152 transitions, 1756 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-10-14 14:34:57,290 INFO L231 Difference]: Finished difference. Result has 160 places, 141 transitions, 1416 flow [2024-10-14 14:34:57,290 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1363, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1416, PETRI_PLACES=160, PETRI_TRANSITIONS=141} [2024-10-14 14:34:57,291 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 138 predicate places. [2024-10-14 14:34:57,291 INFO L471 AbstractCegarLoop]: Abstraction has has 160 places, 141 transitions, 1416 flow [2024-10-14 14:34:57,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 21 states have internal predecessors, (110), 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) [2024-10-14 14:34:57,292 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:34:57,292 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:34:57,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-10-14 14:34:57,492 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:34:57,493 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:34:57,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:34:57,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1769472311, now seen corresponding path program 24 times [2024-10-14 14:34:57,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:34:57,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154064010] [2024-10-14 14:34:57,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:34:57,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:34:57,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:34:57,946 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:57,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:34:57,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154064010] [2024-10-14 14:34:57,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154064010] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:34:57,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816628084] [2024-10-14 14:34:57,947 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-14 14:34:57,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:34:57,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:34:57,949 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:34:57,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-10-14 14:34:58,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-10-14 14:34:58,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:34:58,145 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-14 14:34:58,147 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:34:58,255 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:34:58,256 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 65 treesize of output 41 [2024-10-14 14:34:58,297 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:58,297 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:34:58,453 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-10-14 14:34:58,454 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 44 treesize of output 77 [2024-10-14 14:34:58,522 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:58,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816628084] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:34:58,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:34:58,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2024-10-14 14:34:58,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447310983] [2024-10-14 14:34:58,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:34:58,523 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-14 14:34:58,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:34:58,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-14 14:34:58,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2024-10-14 14:34:58,525 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:34:58,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 141 transitions, 1416 flow. Second operand has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 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) [2024-10-14 14:34:58,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:34:58,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:34:58,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:34:58,945 INFO L124 PetriNetUnfolderBase]: 367/691 cut-off events. [2024-10-14 14:34:58,945 INFO L125 PetriNetUnfolderBase]: For 6826/6826 co-relation queries the response was YES. [2024-10-14 14:34:58,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4421 conditions, 691 events. 367/691 cut-off events. For 6826/6826 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3075 event pairs, 125 based on Foata normal form. 4/695 useless extension candidates. Maximal degree in co-relation 4337. Up to 546 conditions per place. [2024-10-14 14:34:58,950 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 127 selfloop transitions, 33 changer transitions 2/163 dead transitions. [2024-10-14 14:34:58,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 163 transitions, 1874 flow [2024-10-14 14:34:58,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-14 14:34:58,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-14 14:34:58,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 94 transitions. [2024-10-14 14:34:58,951 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3560606060606061 [2024-10-14 14:34:58,952 INFO L175 Difference]: Start difference. First operand has 160 places, 141 transitions, 1416 flow. Second operand 12 states and 94 transitions. [2024-10-14 14:34:58,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 163 transitions, 1874 flow [2024-10-14 14:34:58,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 163 transitions, 1826 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-10-14 14:34:58,969 INFO L231 Difference]: Finished difference. Result has 161 places, 138 transitions, 1403 flow [2024-10-14 14:34:58,969 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1349, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1403, PETRI_PLACES=161, PETRI_TRANSITIONS=138} [2024-10-14 14:34:58,969 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 139 predicate places. [2024-10-14 14:34:58,969 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 138 transitions, 1403 flow [2024-10-14 14:34:58,969 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 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) [2024-10-14 14:34:58,969 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:34:58,969 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:34:58,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-10-14 14:34:59,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:34:59,170 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:34:59,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:34:59,171 INFO L85 PathProgramCache]: Analyzing trace with hash 978001524, now seen corresponding path program 25 times [2024-10-14 14:34:59,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:34:59,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783241584] [2024-10-14 14:34:59,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:34:59,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:34:59,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:34:59,688 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:34:59,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:34:59,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783241584] [2024-10-14 14:34:59,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783241584] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:34:59,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264865442] [2024-10-14 14:34:59,689 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-14 14:34:59,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:34:59,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:34:59,691 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:34:59,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-10-14 14:34:59,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:34:59,891 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-14 14:34:59,892 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:35:00,016 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:35:00,017 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:35:00,149 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-10-14 14:35:00,149 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 71 treesize of output 88 [2024-10-14 14:35:00,223 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:35:00,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264865442] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:35:00,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:35:00,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-10-14 14:35:00,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124393792] [2024-10-14 14:35:00,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:35:00,224 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-14 14:35:00,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:35:00,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-14 14:35:00,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2024-10-14 14:35:00,225 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:35:00,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 138 transitions, 1403 flow. Second operand has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 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) [2024-10-14 14:35:00,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:35:00,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:35:00,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:35:00,529 INFO L124 PetriNetUnfolderBase]: 363/685 cut-off events. [2024-10-14 14:35:00,529 INFO L125 PetriNetUnfolderBase]: For 6787/6787 co-relation queries the response was YES. [2024-10-14 14:35:00,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4407 conditions, 685 events. 363/685 cut-off events. For 6787/6787 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3037 event pairs, 144 based on Foata normal form. 3/688 useless extension candidates. Maximal degree in co-relation 4324. Up to 592 conditions per place. [2024-10-14 14:35:00,535 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 117 selfloop transitions, 24 changer transitions 6/148 dead transitions. [2024-10-14 14:35:00,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 148 transitions, 1737 flow [2024-10-14 14:35:00,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-14 14:35:00,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-14 14:35:00,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 65 transitions. [2024-10-14 14:35:00,536 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3282828282828283 [2024-10-14 14:35:00,536 INFO L175 Difference]: Start difference. First operand has 161 places, 138 transitions, 1403 flow. Second operand 9 states and 65 transitions. [2024-10-14 14:35:00,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 148 transitions, 1737 flow [2024-10-14 14:35:00,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 148 transitions, 1672 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-10-14 14:35:00,554 INFO L231 Difference]: Finished difference. Result has 157 places, 135 transitions, 1347 flow [2024-10-14 14:35:00,554 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1323, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1347, PETRI_PLACES=157, PETRI_TRANSITIONS=135} [2024-10-14 14:35:00,555 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 135 predicate places. [2024-10-14 14:35:00,555 INFO L471 AbstractCegarLoop]: Abstraction has has 157 places, 135 transitions, 1347 flow [2024-10-14 14:35:00,555 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.0) internal successors, (95), 19 states have internal predecessors, (95), 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) [2024-10-14 14:35:00,555 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:35:00,555 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:35:00,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-10-14 14:35:00,755 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:35:00,756 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:35:00,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:35:00,756 INFO L85 PathProgramCache]: Analyzing trace with hash -475944113, now seen corresponding path program 26 times [2024-10-14 14:35:00,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:35:00,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403494547] [2024-10-14 14:35:00,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:35:00,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:35:00,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:35:01,124 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:35:01,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:35:01,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403494547] [2024-10-14 14:35:01,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403494547] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:35:01,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493017593] [2024-10-14 14:35:01,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 14:35:01,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:35:01,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:35:01,127 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:35:01,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-10-14 14:35:01,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 14:35:01,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:35:01,318 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-10-14 14:35:01,319 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:35:01,531 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-14 14:35:01,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-10-14 14:35:01,536 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:35:01,537 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:35:01,677 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-10-14 14:35:01,678 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 44 treesize of output 77 [2024-10-14 14:35:01,736 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:35:01,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493017593] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:35:01,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:35:01,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2024-10-14 14:35:01,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643370843] [2024-10-14 14:35:01,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:35:01,737 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-14 14:35:01,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:35:01,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-14 14:35:01,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-10-14 14:35:01,738 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:35:01,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 135 transitions, 1347 flow. Second operand has 18 states, 18 states have (on average 5.444444444444445) internal successors, (98), 18 states have internal predecessors, (98), 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) [2024-10-14 14:35:01,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:35:01,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:35:01,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:35:02,207 INFO L124 PetriNetUnfolderBase]: 362/675 cut-off events. [2024-10-14 14:35:02,207 INFO L125 PetriNetUnfolderBase]: For 6524/6524 co-relation queries the response was YES. [2024-10-14 14:35:02,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4320 conditions, 675 events. 362/675 cut-off events. For 6524/6524 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 2957 event pairs, 133 based on Foata normal form. 5/680 useless extension candidates. Maximal degree in co-relation 4238. Up to 564 conditions per place. [2024-10-14 14:35:02,213 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 122 selfloop transitions, 27 changer transitions 0/150 dead transitions. [2024-10-14 14:35:02,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 150 transitions, 1756 flow [2024-10-14 14:35:02,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-14 14:35:02,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-14 14:35:02,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 69 transitions. [2024-10-14 14:35:02,215 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3484848484848485 [2024-10-14 14:35:02,215 INFO L175 Difference]: Start difference. First operand has 157 places, 135 transitions, 1347 flow. Second operand 9 states and 69 transitions. [2024-10-14 14:35:02,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 150 transitions, 1756 flow [2024-10-14 14:35:02,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 150 transitions, 1689 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-10-14 14:35:02,237 INFO L231 Difference]: Finished difference. Result has 154 places, 135 transitions, 1339 flow [2024-10-14 14:35:02,237 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1271, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1339, PETRI_PLACES=154, PETRI_TRANSITIONS=135} [2024-10-14 14:35:02,238 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 132 predicate places. [2024-10-14 14:35:02,238 INFO L471 AbstractCegarLoop]: Abstraction has has 154 places, 135 transitions, 1339 flow [2024-10-14 14:35:02,238 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.444444444444445) internal successors, (98), 18 states have internal predecessors, (98), 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) [2024-10-14 14:35:02,238 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:35:02,238 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:35:02,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-10-14 14:35:02,438 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-10-14 14:35:02,439 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:35:02,439 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:35:02,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1603340206, now seen corresponding path program 27 times [2024-10-14 14:35:02,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:35:02,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600328832] [2024-10-14 14:35:02,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:35:02,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:35:02,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:35:03,027 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:35:03,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:35:03,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600328832] [2024-10-14 14:35:03,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600328832] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:35:03,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084378146] [2024-10-14 14:35:03,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 14:35:03,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:35:03,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:35:03,030 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:35:03,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-10-14 14:35:03,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-14 14:35:03,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:35:03,220 INFO L255 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-14 14:35:03,221 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:35:03,351 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:35:03,351 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 65 treesize of output 41 [2024-10-14 14:35:03,395 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:35:03,396 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:35:03,518 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-10-14 14:35:03,518 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 71 treesize of output 88 [2024-10-14 14:35:03,612 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:35:03,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084378146] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:35:03,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:35:03,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2024-10-14 14:35:03,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138756591] [2024-10-14 14:35:03,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:35:03,612 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-14 14:35:03,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:35:03,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-14 14:35:03,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2024-10-14 14:35:03,613 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:35:03,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 135 transitions, 1339 flow. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 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) [2024-10-14 14:35:03,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:35:03,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:35:03,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:35:04,216 INFO L124 PetriNetUnfolderBase]: 351/646 cut-off events. [2024-10-14 14:35:04,216 INFO L125 PetriNetUnfolderBase]: For 6398/6398 co-relation queries the response was YES. [2024-10-14 14:35:04,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4160 conditions, 646 events. 351/646 cut-off events. For 6398/6398 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2752 event pairs, 123 based on Foata normal form. 3/649 useless extension candidates. Maximal degree in co-relation 4078. Up to 550 conditions per place. [2024-10-14 14:35:04,222 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 119 selfloop transitions, 27 changer transitions 3/150 dead transitions. [2024-10-14 14:35:04,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 150 transitions, 1740 flow [2024-10-14 14:35:04,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-14 14:35:04,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-14 14:35:04,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 79 transitions. [2024-10-14 14:35:04,224 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32644628099173556 [2024-10-14 14:35:04,224 INFO L175 Difference]: Start difference. First operand has 154 places, 135 transitions, 1339 flow. Second operand 11 states and 79 transitions. [2024-10-14 14:35:04,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 150 transitions, 1740 flow [2024-10-14 14:35:04,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 150 transitions, 1682 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-10-14 14:35:04,245 INFO L231 Difference]: Finished difference. Result has 156 places, 133 transitions, 1310 flow [2024-10-14 14:35:04,246 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1268, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1310, PETRI_PLACES=156, PETRI_TRANSITIONS=133} [2024-10-14 14:35:04,246 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 134 predicate places. [2024-10-14 14:35:04,246 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 133 transitions, 1310 flow [2024-10-14 14:35:04,246 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 20 states have internal predecessors, (104), 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) [2024-10-14 14:35:04,246 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:35:04,247 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:35:04,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-10-14 14:35:04,447 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-10-14 14:35:04,447 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:35:04,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:35:04,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1792814846, now seen corresponding path program 28 times [2024-10-14 14:35:04,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:35:04,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30331006] [2024-10-14 14:35:04,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:35:04,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:35:04,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:35:04,919 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:35:04,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:35:04,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30331006] [2024-10-14 14:35:04,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30331006] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:35:04,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595429148] [2024-10-14 14:35:04,920 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 14:35:04,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:35:04,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:35:04,922 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:35:04,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-10-14 14:35:05,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 14:35:05,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:35:05,107 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-14 14:35:05,108 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:35:05,220 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-10-14 14:35:05,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-10-14 14:35:05,253 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:35:05,253 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:35:05,506 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-10-14 14:35:05,506 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 44 treesize of output 77 [2024-10-14 14:35:05,551 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:35:05,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595429148] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:35:05,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:35:05,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 22 [2024-10-14 14:35:05,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048072237] [2024-10-14 14:35:05,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:35:05,551 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-14 14:35:05,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:35:05,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-14 14:35:05,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2024-10-14 14:35:05,552 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:35:05,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 133 transitions, 1310 flow. Second operand has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 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) [2024-10-14 14:35:05,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:35:05,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:35:05,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:35:06,046 INFO L124 PetriNetUnfolderBase]: 375/685 cut-off events. [2024-10-14 14:35:06,046 INFO L125 PetriNetUnfolderBase]: For 7502/7502 co-relation queries the response was YES. [2024-10-14 14:35:06,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4536 conditions, 685 events. 375/685 cut-off events. For 7502/7502 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 2964 event pairs, 87 based on Foata normal form. 10/695 useless extension candidates. Maximal degree in co-relation 4454. Up to 546 conditions per place. [2024-10-14 14:35:06,052 INFO L140 encePairwiseOnDemand]: 13/22 looper letters, 123 selfloop transitions, 35 changer transitions 0/159 dead transitions. [2024-10-14 14:35:06,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 159 transitions, 1915 flow [2024-10-14 14:35:06,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-14 14:35:06,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-14 14:35:06,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 99 transitions. [2024-10-14 14:35:06,053 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32142857142857145 [2024-10-14 14:35:06,053 INFO L175 Difference]: Start difference. First operand has 156 places, 133 transitions, 1310 flow. Second operand 14 states and 99 transitions. [2024-10-14 14:35:06,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 159 transitions, 1915 flow [2024-10-14 14:35:06,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 159 transitions, 1844 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-10-14 14:35:06,082 INFO L231 Difference]: Finished difference. Result has 162 places, 141 transitions, 1503 flow [2024-10-14 14:35:06,083 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1243, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1503, PETRI_PLACES=162, PETRI_TRANSITIONS=141} [2024-10-14 14:35:06,084 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 140 predicate places. [2024-10-14 14:35:06,084 INFO L471 AbstractCegarLoop]: Abstraction has has 162 places, 141 transitions, 1503 flow [2024-10-14 14:35:06,084 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.181818181818182) internal successors, (114), 22 states have internal predecessors, (114), 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) [2024-10-14 14:35:06,084 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:35:06,084 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:35:06,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-10-14 14:35:06,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:35:06,285 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:35:06,285 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:35:06,286 INFO L85 PathProgramCache]: Analyzing trace with hash -562267998, now seen corresponding path program 29 times [2024-10-14 14:35:06,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:35:06,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203257897] [2024-10-14 14:35:06,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:35:06,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:35:06,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:35:06,654 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:35:06,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:35:06,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203257897] [2024-10-14 14:35:06,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203257897] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:35:06,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808861508] [2024-10-14 14:35:06,655 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-14 14:35:06,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:35:06,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:35:06,657 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:35:06,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-10-14 14:35:06,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-10-14 14:35:06,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:35:06,868 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-14 14:35:06,869 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:35:06,986 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:35:06,986 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:35:07,112 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-10-14 14:35:07,113 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 32 treesize of output 48 [2024-10-14 14:35:07,135 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:35:07,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808861508] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:35:07,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:35:07,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 21 [2024-10-14 14:35:07,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483047185] [2024-10-14 14:35:07,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:35:07,136 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-14 14:35:07,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:35:07,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-14 14:35:07,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2024-10-14 14:35:07,137 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:35:07,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 141 transitions, 1503 flow. Second operand has 21 states, 21 states have (on average 5.333333333333333) internal successors, (112), 21 states have internal predecessors, (112), 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) [2024-10-14 14:35:07,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:35:07,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:35:07,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:35:07,598 INFO L124 PetriNetUnfolderBase]: 387/705 cut-off events. [2024-10-14 14:35:07,598 INFO L125 PetriNetUnfolderBase]: For 8638/8638 co-relation queries the response was YES. [2024-10-14 14:35:07,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4911 conditions, 705 events. 387/705 cut-off events. For 8638/8638 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3058 event pairs, 26 based on Foata normal form. 4/709 useless extension candidates. Maximal degree in co-relation 4826. Up to 289 conditions per place. [2024-10-14 14:35:07,602 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 108 selfloop transitions, 61 changer transitions 1/171 dead transitions. [2024-10-14 14:35:07,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 171 transitions, 2205 flow [2024-10-14 14:35:07,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-14 14:35:07,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-14 14:35:07,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 98 transitions. [2024-10-14 14:35:07,603 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.34265734265734266 [2024-10-14 14:35:07,603 INFO L175 Difference]: Start difference. First operand has 162 places, 141 transitions, 1503 flow. Second operand 13 states and 98 transitions. [2024-10-14 14:35:07,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 171 transitions, 2205 flow [2024-10-14 14:35:07,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 171 transitions, 2055 flow, removed 55 selfloop flow, removed 8 redundant places. [2024-10-14 14:35:07,622 INFO L231 Difference]: Finished difference. Result has 167 places, 143 transitions, 1529 flow [2024-10-14 14:35:07,622 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1355, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1529, PETRI_PLACES=167, PETRI_TRANSITIONS=143} [2024-10-14 14:35:07,622 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 145 predicate places. [2024-10-14 14:35:07,623 INFO L471 AbstractCegarLoop]: Abstraction has has 167 places, 143 transitions, 1529 flow [2024-10-14 14:35:07,623 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.333333333333333) internal successors, (112), 21 states have internal predecessors, (112), 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) [2024-10-14 14:35:07,623 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:35:07,623 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:35:07,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-10-14 14:35:07,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-10-14 14:35:07,823 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:35:07,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:35:07,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1468901763, now seen corresponding path program 30 times [2024-10-14 14:35:07,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:35:07,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799964401] [2024-10-14 14:35:07,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:35:07,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:35:07,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:35:08,389 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:35:08,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:35:08,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799964401] [2024-10-14 14:35:08,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799964401] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:35:08,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941758996] [2024-10-14 14:35:08,389 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-14 14:35:08,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:35:08,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:35:08,391 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:35:08,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-10-14 14:35:08,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-10-14 14:35:08,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:35:08,570 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-14 14:35:08,571 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:35:08,685 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:35:08,685 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 65 treesize of output 41 [2024-10-14 14:35:08,724 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:35:08,724 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:35:08,836 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-10-14 14:35:08,836 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 71 treesize of output 88 [2024-10-14 14:35:08,923 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:35:08,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941758996] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:35:08,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:35:08,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2024-10-14 14:35:08,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95431286] [2024-10-14 14:35:08,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:35:08,924 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-14 14:35:08,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:35:08,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-14 14:35:08,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-10-14 14:35:08,925 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:35:08,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 143 transitions, 1529 flow. Second operand has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:35:08,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:35:08,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:35:08,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:35:09,341 INFO L124 PetriNetUnfolderBase]: 396/727 cut-off events. [2024-10-14 14:35:09,341 INFO L125 PetriNetUnfolderBase]: For 9258/9258 co-relation queries the response was YES. [2024-10-14 14:35:09,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5079 conditions, 727 events. 396/727 cut-off events. For 9258/9258 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3233 event pairs, 131 based on Foata normal form. 5/732 useless extension candidates. Maximal degree in co-relation 4994. Up to 592 conditions per place. [2024-10-14 14:35:09,347 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 129 selfloop transitions, 30 changer transitions 3/163 dead transitions. [2024-10-14 14:35:09,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 163 transitions, 2033 flow [2024-10-14 14:35:09,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 14:35:09,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-14 14:35:09,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 79 transitions. [2024-10-14 14:35:09,348 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.35909090909090907 [2024-10-14 14:35:09,349 INFO L175 Difference]: Start difference. First operand has 167 places, 143 transitions, 1529 flow. Second operand 10 states and 79 transitions. [2024-10-14 14:35:09,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 163 transitions, 2033 flow [2024-10-14 14:35:09,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 163 transitions, 1916 flow, removed 17 selfloop flow, removed 11 redundant places. [2024-10-14 14:35:09,377 INFO L231 Difference]: Finished difference. Result has 166 places, 144 transitions, 1503 flow [2024-10-14 14:35:09,377 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1412, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1503, PETRI_PLACES=166, PETRI_TRANSITIONS=144} [2024-10-14 14:35:09,379 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 144 predicate places. [2024-10-14 14:35:09,380 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 144 transitions, 1503 flow [2024-10-14 14:35:09,380 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:35:09,380 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:35:09,380 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:35:09,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-10-14 14:35:09,580 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-10-14 14:35:09,581 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:35:09,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:35:09,581 INFO L85 PathProgramCache]: Analyzing trace with hash 753889306, now seen corresponding path program 31 times [2024-10-14 14:35:09,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:35:09,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581965595] [2024-10-14 14:35:09,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:35:09,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:35:09,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:35:10,040 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:35:10,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:35:10,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581965595] [2024-10-14 14:35:10,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581965595] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:35:10,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090024010] [2024-10-14 14:35:10,041 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-14 14:35:10,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:35:10,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:35:10,043 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:35:10,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-10-14 14:35:10,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:35:10,252 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-14 14:35:10,253 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:35:10,329 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-10-14 14:35:10,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 9 [2024-10-14 14:35:10,331 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:35:10,331 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:35:10,484 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-10-14 14:35:10,484 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 32 treesize of output 48 [2024-10-14 14:35:10,494 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:35:10,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090024010] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:35:10,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:35:10,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2024-10-14 14:35:10,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199176567] [2024-10-14 14:35:10,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:35:10,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-14 14:35:10,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:35:10,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-14 14:35:10,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2024-10-14 14:35:10,496 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:35:10,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 144 transitions, 1503 flow. Second operand has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 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) [2024-10-14 14:35:10,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:35:10,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:35:10,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:35:10,888 INFO L124 PetriNetUnfolderBase]: 414/757 cut-off events. [2024-10-14 14:35:10,888 INFO L125 PetriNetUnfolderBase]: For 9408/9408 co-relation queries the response was YES. [2024-10-14 14:35:10,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5295 conditions, 757 events. 414/757 cut-off events. For 9408/9408 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3389 event pairs, 31 based on Foata normal form. 4/761 useless extension candidates. Maximal degree in co-relation 5211. Up to 322 conditions per place. [2024-10-14 14:35:10,893 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 112 selfloop transitions, 60 changer transitions 1/174 dead transitions. [2024-10-14 14:35:10,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 174 transitions, 2219 flow [2024-10-14 14:35:10,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-14 14:35:10,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-14 14:35:10,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 92 transitions. [2024-10-14 14:35:10,894 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3484848484848485 [2024-10-14 14:35:10,894 INFO L175 Difference]: Start difference. First operand has 166 places, 144 transitions, 1503 flow. Second operand 12 states and 92 transitions. [2024-10-14 14:35:10,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 174 transitions, 2219 flow [2024-10-14 14:35:10,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 174 transitions, 2148 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-10-14 14:35:10,916 INFO L231 Difference]: Finished difference. Result has 171 places, 148 transitions, 1641 flow [2024-10-14 14:35:10,916 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1432, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1641, PETRI_PLACES=171, PETRI_TRANSITIONS=148} [2024-10-14 14:35:10,917 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 149 predicate places. [2024-10-14 14:35:10,917 INFO L471 AbstractCegarLoop]: Abstraction has has 171 places, 148 transitions, 1641 flow [2024-10-14 14:35:10,917 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.222222222222222) internal successors, (94), 18 states have internal predecessors, (94), 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) [2024-10-14 14:35:10,917 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:35:10,917 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:35:10,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-10-14 14:35:11,117 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-10-14 14:35:11,118 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:35:11,118 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:35:11,118 INFO L85 PathProgramCache]: Analyzing trace with hash 679894773, now seen corresponding path program 32 times [2024-10-14 14:35:11,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:35:11,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224443092] [2024-10-14 14:35:11,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:35:11,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:35:11,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:35:11,729 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:35:11,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:35:11,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224443092] [2024-10-14 14:35:11,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224443092] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:35:11,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880074172] [2024-10-14 14:35:11,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 14:35:11,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:35:11,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:35:11,732 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:35:11,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-10-14 14:35:11,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 14:35:11,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:35:11,922 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-14 14:35:11,923 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:35:12,057 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:35:12,058 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 65 treesize of output 41 [2024-10-14 14:35:12,091 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:35:12,091 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:35:12,223 INFO L349 Elim1Store]: treesize reduction 24, result has 65.2 percent of original size [2024-10-14 14:35:12,223 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 63 treesize of output 67 [2024-10-14 14:35:12,263 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:35:12,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880074172] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:35:12,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:35:12,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2024-10-14 14:35:12,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973689234] [2024-10-14 14:35:12,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:35:12,264 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-14 14:35:12,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:35:12,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-14 14:35:12,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2024-10-14 14:35:12,265 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:35:12,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 148 transitions, 1641 flow. Second operand has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:35:12,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:35:12,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:35:12,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:35:13,032 INFO L124 PetriNetUnfolderBase]: 423/779 cut-off events. [2024-10-14 14:35:13,032 INFO L125 PetriNetUnfolderBase]: For 11104/11104 co-relation queries the response was YES. [2024-10-14 14:35:13,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5610 conditions, 779 events. 423/779 cut-off events. For 11104/11104 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 3599 event pairs, 84 based on Foata normal form. 5/784 useless extension candidates. Maximal degree in co-relation 5524. Up to 419 conditions per place. [2024-10-14 14:35:13,038 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 124 selfloop transitions, 60 changer transitions 5/190 dead transitions. [2024-10-14 14:35:13,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 190 transitions, 2443 flow [2024-10-14 14:35:13,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-14 14:35:13,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-14 14:35:13,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 114 transitions. [2024-10-14 14:35:13,039 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37012987012987014 [2024-10-14 14:35:13,039 INFO L175 Difference]: Start difference. First operand has 171 places, 148 transitions, 1641 flow. Second operand 14 states and 114 transitions. [2024-10-14 14:35:13,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 190 transitions, 2443 flow [2024-10-14 14:35:13,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 190 transitions, 2334 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-10-14 14:35:13,065 INFO L231 Difference]: Finished difference. Result has 177 places, 149 transitions, 1680 flow [2024-10-14 14:35:13,065 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1533, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1680, PETRI_PLACES=177, PETRI_TRANSITIONS=149} [2024-10-14 14:35:13,066 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 155 predicate places. [2024-10-14 14:35:13,066 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 149 transitions, 1680 flow [2024-10-14 14:35:13,066 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:35:13,066 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:35:13,066 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:35:13,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-10-14 14:35:13,267 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:35:13,267 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:35:13,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:35:13,267 INFO L85 PathProgramCache]: Analyzing trace with hash -730554144, now seen corresponding path program 33 times [2024-10-14 14:35:13,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:35:13,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400270162] [2024-10-14 14:35:13,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:35:13,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:35:13,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:35:13,983 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-14 14:35:13,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:35:13,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400270162] [2024-10-14 14:35:13,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400270162] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:35:13,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116998527] [2024-10-14 14:35:13,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 14:35:13,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:35:13,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:35:13,985 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:35:13,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-10-14 14:35:14,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-14 14:35:14,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:35:14,181 INFO L255 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-14 14:35:14,183 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:35:14,297 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:35:14,297 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 65 treesize of output 41 [2024-10-14 14:35:14,334 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:35:14,334 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:35:14,456 INFO L349 Elim1Store]: treesize reduction 11, result has 85.7 percent of original size [2024-10-14 14:35:14,456 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 71 treesize of output 88 [2024-10-14 14:35:14,533 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-10-14 14:35:14,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116998527] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:35:14,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:35:14,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 7] total 24 [2024-10-14 14:35:14,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484257754] [2024-10-14 14:35:14,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:35:14,533 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-14 14:35:14,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:35:14,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-14 14:35:14,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2024-10-14 14:35:14,534 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-10-14 14:35:14,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 149 transitions, 1680 flow. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 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) [2024-10-14 14:35:14,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:35:14,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-10-14 14:35:14,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:35:14,998 INFO L124 PetriNetUnfolderBase]: 437/815 cut-off events. [2024-10-14 14:35:14,999 INFO L125 PetriNetUnfolderBase]: For 11336/11336 co-relation queries the response was YES. [2024-10-14 14:35:15,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5925 conditions, 815 events. 437/815 cut-off events. For 11336/11336 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 3833 event pairs, 151 based on Foata normal form. 4/819 useless extension candidates. Maximal degree in co-relation 5839. Up to 665 conditions per place. [2024-10-14 14:35:15,009 INFO L140 encePairwiseOnDemand]: 12/22 looper letters, 122 selfloop transitions, 44 changer transitions 1/168 dead transitions. [2024-10-14 14:35:15,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 168 transitions, 2190 flow [2024-10-14 14:35:15,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-14 14:35:15,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-14 14:35:15,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 97 transitions. [2024-10-14 14:35:15,010 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.31493506493506496 [2024-10-14 14:35:15,010 INFO L175 Difference]: Start difference. First operand has 177 places, 149 transitions, 1680 flow. Second operand 14 states and 97 transitions. [2024-10-14 14:35:15,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 168 transitions, 2190 flow [2024-10-14 14:35:15,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 168 transitions, 2050 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-10-14 14:35:15,041 INFO L231 Difference]: Finished difference. Result has 180 places, 150 transitions, 1669 flow [2024-10-14 14:35:15,041 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1542, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1669, PETRI_PLACES=180, PETRI_TRANSITIONS=150} [2024-10-14 14:35:15,041 INFO L277 CegarLoopForPetriNet]: 22 programPoint places, 158 predicate places. [2024-10-14 14:35:15,041 INFO L471 AbstractCegarLoop]: Abstraction has has 180 places, 150 transitions, 1669 flow [2024-10-14 14:35:15,041 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 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) [2024-10-14 14:35:15,041 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:35:15,042 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:35:15,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-10-14 14:35:15,242 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:35:15,242 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:35:15,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:35:15,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1035678370, now seen corresponding path program 34 times [2024-10-14 14:35:15,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:35:15,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815661493] [2024-10-14 14:35:15,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:35:15,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:35:15,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat