./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/unroll-cond-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-3.wvr.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9fb4c28a8a216c266c6ae14d377c8e26c68bb16bf7c2fe2809f039d12d6c4b55 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 14:37:36,995 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 14:37:37,065 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 14:37:37,070 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 14:37:37,072 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 14:37:37,096 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 14:37:37,098 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 14:37:37,098 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 14:37:37,099 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 14:37:37,099 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 14:37:37,099 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 14:37:37,100 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 14:37:37,100 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 14:37:37,102 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 14:37:37,102 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 14:37:37,102 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 14:37:37,103 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 14:37:37,103 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 14:37:37,103 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 14:37:37,103 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 14:37:37,103 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 14:37:37,104 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 14:37:37,106 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 14:37:37,107 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 14:37:37,107 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 14:37:37,107 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 14:37:37,107 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 14:37:37,107 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 14:37:37,107 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 14:37:37,108 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 14:37:37,108 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 14:37:37,108 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 14:37:37,108 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:37:37,108 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 14:37:37,108 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 14:37:37,108 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 14:37:37,108 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 14:37:37,109 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 14:37:37,109 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 14:37:37,109 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 14:37:37,109 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 14:37:37,110 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 14:37:37,110 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9fb4c28a8a216c266c6ae14d377c8e26c68bb16bf7c2fe2809f039d12d6c4b55 [2024-10-11 14:37:37,300 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 14:37:37,320 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 14:37:37,322 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 14:37:37,323 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 14:37:37,323 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 14:37:37,324 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-3.wvr.c [2024-10-11 14:37:38,604 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 14:37:38,801 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 14:37:38,801 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-3.wvr.c [2024-10-11 14:37:38,808 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/23a0b66f4/03ce955a696d4c46b1a5ed5206bf91aa/FLAGcb93e6e57 [2024-10-11 14:37:38,819 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/23a0b66f4/03ce955a696d4c46b1a5ed5206bf91aa [2024-10-11 14:37:38,821 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 14:37:38,822 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 14:37:38,825 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 14:37:38,825 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 14:37:38,830 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 14:37:38,830 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:37:38" (1/1) ... [2024-10-11 14:37:38,831 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4742efe3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:37:38, skipping insertion in model container [2024-10-11 14:37:38,831 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:37:38" (1/1) ... [2024-10-11 14:37:38,851 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 14:37:39,006 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/unroll-cond-3.wvr.c[2667,2680] [2024-10-11 14:37:39,015 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:37:39,022 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 14:37:39,042 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/unroll-cond-3.wvr.c[2667,2680] [2024-10-11 14:37:39,045 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:37:39,066 INFO L204 MainTranslator]: Completed translation [2024-10-11 14:37:39,067 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:37:39 WrapperNode [2024-10-11 14:37:39,067 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 14:37:39,068 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 14:37:39,068 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 14:37:39,068 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 14:37:39,077 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:37:39" (1/1) ... [2024-10-11 14:37:39,085 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:37:39" (1/1) ... [2024-10-11 14:37:39,107 INFO L138 Inliner]: procedures = 23, calls = 27, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 155 [2024-10-11 14:37:39,108 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 14:37:39,108 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 14:37:39,108 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 14:37:39,109 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 14:37:39,119 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:37:39" (1/1) ... [2024-10-11 14:37:39,119 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:37:39" (1/1) ... [2024-10-11 14:37:39,122 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:37:39" (1/1) ... [2024-10-11 14:37:39,136 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-10-11 14:37:39,136 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:37:39" (1/1) ... [2024-10-11 14:37:39,136 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:37:39" (1/1) ... [2024-10-11 14:37:39,142 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:37:39" (1/1) ... [2024-10-11 14:37:39,146 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:37:39" (1/1) ... [2024-10-11 14:37:39,147 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:37:39" (1/1) ... [2024-10-11 14:37:39,148 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:37:39" (1/1) ... [2024-10-11 14:37:39,151 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 14:37:39,152 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 14:37:39,152 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 14:37:39,152 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 14:37:39,153 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:37:39" (1/1) ... [2024-10-11 14:37:39,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:37:39,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:37:39,186 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 14:37:39,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 14:37:39,238 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 14:37:39,238 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-11 14:37:39,239 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-11 14:37:39,239 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-11 14:37:39,239 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-11 14:37:39,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 14:37:39,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 14:37:39,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 14:37:39,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 14:37:39,241 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-11 14:37:39,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 14:37:39,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 14:37:39,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 14:37:39,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 14:37:39,244 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 14:37:39,362 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 14:37:39,364 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 14:37:39,672 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 14:37:39,672 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 14:37:39,940 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 14:37:39,940 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-11 14:37:39,940 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:37:39 BoogieIcfgContainer [2024-10-11 14:37:39,941 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 14:37:39,943 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 14:37:39,943 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 14:37:39,946 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 14:37:39,947 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:37:38" (1/3) ... [2024-10-11 14:37:39,947 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bc016bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:37:39, skipping insertion in model container [2024-10-11 14:37:39,948 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:37:39" (2/3) ... [2024-10-11 14:37:39,948 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bc016bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:37:39, skipping insertion in model container [2024-10-11 14:37:39,948 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:37:39" (3/3) ... [2024-10-11 14:37:39,949 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-3.wvr.c [2024-10-11 14:37:39,964 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 14:37:39,965 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 14:37:39,965 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 14:37:40,003 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-11 14:37:40,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 20 transitions, 54 flow [2024-10-11 14:37:40,054 INFO L124 PetriNetUnfolderBase]: 3/18 cut-off events. [2024-10-11 14:37:40,054 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 14:37:40,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 18 events. 3/18 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 12 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2024-10-11 14:37:40,057 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 20 transitions, 54 flow [2024-10-11 14:37:40,059 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 17 transitions, 46 flow [2024-10-11 14:37:40,068 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:37:40,074 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;@8174050, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:37:40,075 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-11 14:37:40,088 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:37:40,088 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2024-10-11 14:37:40,089 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 14:37:40,089 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:37:40,089 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:37:40,090 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:37:40,095 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:37:40,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1958557296, now seen corresponding path program 1 times [2024-10-11 14:37:40,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:37:40,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907762465] [2024-10-11 14:37:40,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:37:40,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:37:40,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:37:40,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:37:40,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:37:40,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907762465] [2024-10-11 14:37:40,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907762465] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:37:40,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:37:40,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 14:37:40,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119114747] [2024-10-11 14:37:40,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:37:40,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:37:40,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:37:40,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:37:40,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:37:40,491 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-11 14:37:40,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:37:40,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:37:40,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-11 14:37:40,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:37:40,570 INFO L124 PetriNetUnfolderBase]: 38/71 cut-off events. [2024-10-11 14:37:40,570 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-10-11 14:37:40,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 71 events. 38/71 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 121 event pairs, 22 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 120. Up to 70 conditions per place. [2024-10-11 14:37:40,573 INFO L140 encePairwiseOnDemand]: 17/20 looper letters, 15 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2024-10-11 14:37:40,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 82 flow [2024-10-11 14:37:40,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:37:40,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:37:40,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 27 transitions. [2024-10-11 14:37:40,583 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-10-11 14:37:40,584 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 27 transitions. [2024-10-11 14:37:40,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 82 flow [2024-10-11 14:37:40,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 74 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-11 14:37:40,588 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2024-10-11 14:37:40,590 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2024-10-11 14:37:40,593 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2024-10-11 14:37:40,594 INFO L471 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2024-10-11 14:37:40,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:37:40,594 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:37:40,594 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:37:40,594 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 14:37:40,594 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:37:40,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:37:40,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1419692673, now seen corresponding path program 1 times [2024-10-11 14:37:40,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:37:40,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571819912] [2024-10-11 14:37:40,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:37:40,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:37:40,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:37:40,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:37:40,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:37:40,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571819912] [2024-10-11 14:37:40,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571819912] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:37:40,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:37:40,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 14:37:40,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181954253] [2024-10-11 14:37:40,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:37:40,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 14:37:40,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:37:40,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 14:37:40,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 14:37:40,883 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-11 14:37:40,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:37:40,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:37:40,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-11 14:37:40,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:37:41,074 INFO L124 PetriNetUnfolderBase]: 65/123 cut-off events. [2024-10-11 14:37:41,074 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 14:37:41,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 123 events. 65/123 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 323 event pairs, 22 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 248. Up to 71 conditions per place. [2024-10-11 14:37:41,076 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 32 selfloop transitions, 5 changer transitions 0/38 dead transitions. [2024-10-11 14:37:41,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 38 transitions, 169 flow [2024-10-11 14:37:41,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 14:37:41,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 14:37:41,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 52 transitions. [2024-10-11 14:37:41,078 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-10-11 14:37:41,078 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 5 states and 52 transitions. [2024-10-11 14:37:41,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 38 transitions, 169 flow [2024-10-11 14:37:41,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 38 transitions, 165 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-11 14:37:41,080 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 82 flow [2024-10-11 14:37:41,080 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2024-10-11 14:37:41,081 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2024-10-11 14:37:41,081 INFO L471 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 82 flow [2024-10-11 14:37:41,082 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:37:41,082 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:37:41,082 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:37:41,082 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 14:37:41,083 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:37:41,083 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:37:41,084 INFO L85 PathProgramCache]: Analyzing trace with hash 838542481, now seen corresponding path program 2 times [2024-10-11 14:37:41,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:37:41,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768098681] [2024-10-11 14:37:41,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:37:41,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:37:41,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:37:41,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:37:41,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:37:41,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768098681] [2024-10-11 14:37:41,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768098681] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:37:41,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:37:41,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 14:37:41,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230811519] [2024-10-11 14:37:41,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:37:41,366 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 14:37:41,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:37:41,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 14:37:41,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-11 14:37:41,367 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-11 14:37:41,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 82 flow. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:37:41,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:37:41,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-11 14:37:41,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:37:41,554 INFO L124 PetriNetUnfolderBase]: 98/190 cut-off events. [2024-10-11 14:37:41,554 INFO L125 PetriNetUnfolderBase]: For 92/92 co-relation queries the response was YES. [2024-10-11 14:37:41,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 545 conditions, 190 events. 98/190 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 602 event pairs, 3 based on Foata normal form. 1/154 useless extension candidates. Maximal degree in co-relation 527. Up to 75 conditions per place. [2024-10-11 14:37:41,557 INFO L140 encePairwiseOnDemand]: 12/20 looper letters, 38 selfloop transitions, 19 changer transitions 2/60 dead transitions. [2024-10-11 14:37:41,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 60 transitions, 335 flow [2024-10-11 14:37:41,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 14:37:41,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 14:37:41,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 79 transitions. [2024-10-11 14:37:41,559 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49375 [2024-10-11 14:37:41,559 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 82 flow. Second operand 8 states and 79 transitions. [2024-10-11 14:37:41,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 60 transitions, 335 flow [2024-10-11 14:37:41,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 60 transitions, 317 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-10-11 14:37:41,561 INFO L231 Difference]: Finished difference. Result has 35 places, 37 transitions, 197 flow [2024-10-11 14:37:41,561 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=197, PETRI_PLACES=35, PETRI_TRANSITIONS=37} [2024-10-11 14:37:41,563 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2024-10-11 14:37:41,563 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 37 transitions, 197 flow [2024-10-11 14:37:41,564 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:37:41,564 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:37:41,564 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:37:41,564 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 14:37:41,564 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:37:41,565 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:37:41,565 INFO L85 PathProgramCache]: Analyzing trace with hash -835769155, now seen corresponding path program 3 times [2024-10-11 14:37:41,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:37:41,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278170420] [2024-10-11 14:37:41,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:37:41,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:37:41,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:37:41,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:37:41,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:37:41,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278170420] [2024-10-11 14:37:41,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278170420] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:37:41,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:37:41,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 14:37:41,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779342464] [2024-10-11 14:37:41,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:37:41,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 14:37:41,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:37:41,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 14:37:41,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-11 14:37:41,787 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-11 14:37:41,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 37 transitions, 197 flow. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:37:41,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:37:41,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-11 14:37:41,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:37:41,911 INFO L124 PetriNetUnfolderBase]: 106/199 cut-off events. [2024-10-11 14:37:41,912 INFO L125 PetriNetUnfolderBase]: For 228/228 co-relation queries the response was YES. [2024-10-11 14:37:41,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 690 conditions, 199 events. 106/199 cut-off events. For 228/228 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 616 event pairs, 10 based on Foata normal form. 3/184 useless extension candidates. Maximal degree in co-relation 668. Up to 151 conditions per place. [2024-10-11 14:37:41,913 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 36 selfloop transitions, 17 changer transitions 0/54 dead transitions. [2024-10-11 14:37:41,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 54 transitions, 371 flow [2024-10-11 14:37:41,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:37:41,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:37:41,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 60 transitions. [2024-10-11 14:37:41,915 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-10-11 14:37:41,915 INFO L175 Difference]: Start difference. First operand has 35 places, 37 transitions, 197 flow. Second operand 6 states and 60 transitions. [2024-10-11 14:37:41,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 54 transitions, 371 flow [2024-10-11 14:37:41,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 54 transitions, 341 flow, removed 13 selfloop flow, removed 1 redundant places. [2024-10-11 14:37:41,918 INFO L231 Difference]: Finished difference. Result has 40 places, 42 transitions, 243 flow [2024-10-11 14:37:41,918 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=243, PETRI_PLACES=40, PETRI_TRANSITIONS=42} [2024-10-11 14:37:41,919 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 19 predicate places. [2024-10-11 14:37:41,919 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 42 transitions, 243 flow [2024-10-11 14:37:41,919 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:37:41,919 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:37:41,920 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:37:41,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 14:37:41,920 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:37:41,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:37:41,920 INFO L85 PathProgramCache]: Analyzing trace with hash 760488887, now seen corresponding path program 4 times [2024-10-11 14:37:41,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:37:41,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962525524] [2024-10-11 14:37:41,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:37:41,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:37:41,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:37:42,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:37:42,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:37:42,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962525524] [2024-10-11 14:37:42,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962525524] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:37:42,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:37:42,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 14:37:42,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766552403] [2024-10-11 14:37:42,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:37:42,084 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 14:37:42,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:37:42,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 14:37:42,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-11 14:37:42,085 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-11 14:37:42,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 42 transitions, 243 flow. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:37:42,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:37:42,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-11 14:37:42,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:37:42,183 INFO L124 PetriNetUnfolderBase]: 104/191 cut-off events. [2024-10-11 14:37:42,183 INFO L125 PetriNetUnfolderBase]: For 267/267 co-relation queries the response was YES. [2024-10-11 14:37:42,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 664 conditions, 191 events. 104/191 cut-off events. For 267/267 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 557 event pairs, 15 based on Foata normal form. 3/176 useless extension candidates. Maximal degree in co-relation 640. Up to 144 conditions per place. [2024-10-11 14:37:42,185 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 35 selfloop transitions, 18 changer transitions 0/54 dead transitions. [2024-10-11 14:37:42,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 54 transitions, 398 flow [2024-10-11 14:37:42,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:37:42,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:37:42,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 58 transitions. [2024-10-11 14:37:42,186 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-10-11 14:37:42,186 INFO L175 Difference]: Start difference. First operand has 40 places, 42 transitions, 243 flow. Second operand 6 states and 58 transitions. [2024-10-11 14:37:42,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 54 transitions, 398 flow [2024-10-11 14:37:42,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 54 transitions, 370 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-10-11 14:37:42,190 INFO L231 Difference]: Finished difference. Result has 44 places, 44 transitions, 275 flow [2024-10-11 14:37:42,190 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=275, PETRI_PLACES=44, PETRI_TRANSITIONS=44} [2024-10-11 14:37:42,190 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 23 predicate places. [2024-10-11 14:37:42,190 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 44 transitions, 275 flow [2024-10-11 14:37:42,191 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:37:42,191 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:37:42,191 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:37:42,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-11 14:37:42,191 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:37:42,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:37:42,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1456327302, now seen corresponding path program 1 times [2024-10-11 14:37:42,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:37:42,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483681530] [2024-10-11 14:37:42,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:37:42,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:37:42,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:37:42,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:37:42,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:37:42,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483681530] [2024-10-11 14:37:42,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483681530] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:37:42,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407811701] [2024-10-11 14:37:42,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:37:42,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:37:42,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:37:42,360 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:37:42,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 14:37:42,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:37:42,432 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-11 14:37:42,437 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:37:42,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-11 14:37:42,793 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-11 14:37:42,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:37:42,807 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:37:43,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-10-11 14:37:43,459 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-11 14:37:43,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2024-10-11 14:37:43,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:37:43,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407811701] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:37:43,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:37:43,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-10-11 14:37:43,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277378544] [2024-10-11 14:37:43,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:37:43,487 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-11 14:37:43,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:37:43,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-11 14:37:43,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2024-10-11 14:37:43,489 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-11 14:37:43,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 44 transitions, 275 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) [2024-10-11 14:37:43,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:37:43,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-11 14:37:43,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:37:45,918 INFO L124 PetriNetUnfolderBase]: 199/384 cut-off events. [2024-10-11 14:37:45,918 INFO L125 PetriNetUnfolderBase]: For 333/333 co-relation queries the response was YES. [2024-10-11 14:37:45,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1225 conditions, 384 events. 199/384 cut-off events. For 333/333 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1532 event pairs, 3 based on Foata normal form. 1/342 useless extension candidates. Maximal degree in co-relation 1200. Up to 119 conditions per place. [2024-10-11 14:37:45,921 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 84 selfloop transitions, 44 changer transitions 3/132 dead transitions. [2024-10-11 14:37:45,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 132 transitions, 857 flow [2024-10-11 14:37:45,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-11 14:37:45,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-10-11 14:37:45,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 169 transitions. [2024-10-11 14:37:45,923 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44473684210526315 [2024-10-11 14:37:45,923 INFO L175 Difference]: Start difference. First operand has 44 places, 44 transitions, 275 flow. Second operand 19 states and 169 transitions. [2024-10-11 14:37:45,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 132 transitions, 857 flow [2024-10-11 14:37:45,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 132 transitions, 803 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-10-11 14:37:45,927 INFO L231 Difference]: Finished difference. Result has 66 places, 69 transitions, 508 flow [2024-10-11 14:37:45,928 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=508, PETRI_PLACES=66, PETRI_TRANSITIONS=69} [2024-10-11 14:37:45,928 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 45 predicate places. [2024-10-11 14:37:45,928 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 69 transitions, 508 flow [2024-10-11 14:37:45,929 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) [2024-10-11 14:37:45,929 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:37:45,929 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:37:45,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-11 14:37:46,133 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:37:46,137 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:37:46,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:37:46,138 INFO L85 PathProgramCache]: Analyzing trace with hash -995429169, now seen corresponding path program 1 times [2024-10-11 14:37:46,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:37:46,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568907154] [2024-10-11 14:37:46,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:37:46,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:37:46,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:37:46,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:37:46,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:37:46,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568907154] [2024-10-11 14:37:46,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568907154] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:37:46,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579791096] [2024-10-11 14:37:46,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:37:46,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:37:46,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:37:46,282 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:37:46,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 14:37:46,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:37:46,348 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-11 14:37:46,351 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:37:46,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-11 14:37:46,631 INFO L349 Elim1Store]: treesize reduction 39, result has 20.4 percent of original size [2024-10-11 14:37:46,632 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 7 new quantified variables, introduced 6 case distinctions, treesize of input 152 treesize of output 86 [2024-10-11 14:37:46,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:37:46,664 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:37:47,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 318 treesize of output 280 [2024-10-11 14:37:47,715 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:37:47,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 1130 treesize of output 862 [2024-10-11 14:38:27,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:38:27,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579791096] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:38:27,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:38:27,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 8] total 21 [2024-10-11 14:38:27,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612565576] [2024-10-11 14:38:27,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:38:27,307 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-11 14:38:27,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:38:27,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-11 14:38:27,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2024-10-11 14:38:27,308 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-11 14:38:27,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 69 transitions, 508 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) [2024-10-11 14:38:27,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:38:27,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-11 14:38:27,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:38:28,400 INFO L124 PetriNetUnfolderBase]: 398/738 cut-off events. [2024-10-11 14:38:28,400 INFO L125 PetriNetUnfolderBase]: For 1636/1636 co-relation queries the response was YES. [2024-10-11 14:38:28,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3047 conditions, 738 events. 398/738 cut-off events. For 1636/1636 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3464 event pairs, 19 based on Foata normal form. 4/695 useless extension candidates. Maximal degree in co-relation 2835. Up to 231 conditions per place. [2024-10-11 14:38:28,405 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 106 selfloop transitions, 75 changer transitions 31/213 dead transitions. [2024-10-11 14:38:28,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 213 transitions, 1713 flow [2024-10-11 14:38:28,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-11 14:38:28,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-10-11 14:38:28,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 231 transitions. [2024-10-11 14:38:28,408 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-10-11 14:38:28,408 INFO L175 Difference]: Start difference. First operand has 66 places, 69 transitions, 508 flow. Second operand 28 states and 231 transitions. [2024-10-11 14:38:28,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 213 transitions, 1713 flow [2024-10-11 14:38:28,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 213 transitions, 1601 flow, removed 43 selfloop flow, removed 2 redundant places. [2024-10-11 14:38:28,420 INFO L231 Difference]: Finished difference. Result has 99 places, 115 transitions, 1006 flow [2024-10-11 14:38:28,421 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=450, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1006, PETRI_PLACES=99, PETRI_TRANSITIONS=115} [2024-10-11 14:38:28,422 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 78 predicate places. [2024-10-11 14:38:28,422 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 115 transitions, 1006 flow [2024-10-11 14:38:28,422 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) [2024-10-11 14:38:28,422 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:38:28,422 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:38:28,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-11 14:38:28,626 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:38:28,630 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:38:28,630 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:38:28,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1333235710, now seen corresponding path program 2 times [2024-10-11 14:38:28,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:38:28,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743815248] [2024-10-11 14:38:28,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:38:28,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:38:28,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:38:28,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:38:28,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:38:28,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743815248] [2024-10-11 14:38:28,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743815248] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:38:28,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337250275] [2024-10-11 14:38:28,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:38:28,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:38:28,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:38:28,844 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:38:28,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 14:38:28,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:38:28,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:38:28,922 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-11 14:38:28,924 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:38:28,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-11 14:38:29,127 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-11 14:38:29,127 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 115 treesize of output 104 [2024-10-11 14:38:29,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:38:29,183 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:38:29,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-10-11 14:38:29,826 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-11 14:38:29,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2024-10-11 14:38:29,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 77 [2024-10-11 14:38:29,878 INFO L349 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2024-10-11 14:38:29,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 164 [2024-10-11 14:38:30,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:38:30,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337250275] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:38:30,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:38:30,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 19 [2024-10-11 14:38:30,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515550801] [2024-10-11 14:38:30,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:38:30,132 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-11 14:38:30,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:38:30,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-11 14:38:30,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2024-10-11 14:38:30,133 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-11 14:38:30,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 115 transitions, 1006 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) [2024-10-11 14:38:30,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:38:30,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-11 14:38:30,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:38:32,896 INFO L124 PetriNetUnfolderBase]: 487/944 cut-off events. [2024-10-11 14:38:32,896 INFO L125 PetriNetUnfolderBase]: For 3583/3583 co-relation queries the response was YES. [2024-10-11 14:38:32,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4351 conditions, 944 events. 487/944 cut-off events. For 3583/3583 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 4938 event pairs, 19 based on Foata normal form. 14/958 useless extension candidates. Maximal degree in co-relation 4196. Up to 275 conditions per place. [2024-10-11 14:38:32,903 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 113 selfloop transitions, 76 changer transitions 78/268 dead transitions. [2024-10-11 14:38:32,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 268 transitions, 2468 flow [2024-10-11 14:38:32,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-10-11 14:38:32,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-10-11 14:38:32,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 271 transitions. [2024-10-11 14:38:32,906 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4672413793103448 [2024-10-11 14:38:32,906 INFO L175 Difference]: Start difference. First operand has 99 places, 115 transitions, 1006 flow. Second operand 29 states and 271 transitions. [2024-10-11 14:38:32,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 268 transitions, 2468 flow [2024-10-11 14:38:32,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 268 transitions, 2307 flow, removed 51 selfloop flow, removed 9 redundant places. [2024-10-11 14:38:32,923 INFO L231 Difference]: Finished difference. Result has 123 places, 114 transitions, 1090 flow [2024-10-11 14:38:32,923 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=903, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1090, PETRI_PLACES=123, PETRI_TRANSITIONS=114} [2024-10-11 14:38:32,923 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 102 predicate places. [2024-10-11 14:38:32,923 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 114 transitions, 1090 flow [2024-10-11 14:38:32,924 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) [2024-10-11 14:38:32,924 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:38:32,924 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:38:32,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 14:38:33,124 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:38:33,125 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:38:33,125 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:38:33,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1251118278, now seen corresponding path program 3 times [2024-10-11 14:38:33,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:38:33,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589770537] [2024-10-11 14:38:33,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:38:33,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:38:33,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:38:33,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:38:33,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:38:33,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589770537] [2024-10-11 14:38:33,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589770537] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:38:33,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377743678] [2024-10-11 14:38:33,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:38:33,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:38:33,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:38:33,293 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:38:33,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 14:38:33,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-11 14:38:33,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:38:33,352 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-11 14:38:33,353 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:38:33,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-11 14:38:33,522 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-11 14:38:33,522 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 115 treesize of output 104 [2024-10-11 14:38:33,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:38:33,574 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:38:34,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 77 [2024-10-11 14:38:34,448 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:38:34,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 188 [2024-10-11 14:38:35,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-10-11 14:38:35,398 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-10-11 14:38:35,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 1 [2024-10-11 14:38:35,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:38:35,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377743678] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:38:35,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:38:35,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 19 [2024-10-11 14:38:35,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726030396] [2024-10-11 14:38:35,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:38:35,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-11 14:38:35,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:38:35,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-11 14:38:35,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2024-10-11 14:38:35,422 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-11 14:38:35,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 114 transitions, 1090 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) [2024-10-11 14:38:35,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:38:35,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-11 14:38:35,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:38:38,941 INFO L124 PetriNetUnfolderBase]: 336/748 cut-off events. [2024-10-11 14:38:38,942 INFO L125 PetriNetUnfolderBase]: For 3327/3327 co-relation queries the response was YES. [2024-10-11 14:38:38,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3635 conditions, 748 events. 336/748 cut-off events. For 3327/3327 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4204 event pairs, 17 based on Foata normal form. 9/757 useless extension candidates. Maximal degree in co-relation 3484. Up to 353 conditions per place. [2024-10-11 14:38:38,947 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 113 selfloop transitions, 82 changer transitions 10/206 dead transitions. [2024-10-11 14:38:38,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 206 transitions, 2043 flow [2024-10-11 14:38:38,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-10-11 14:38:38,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-10-11 14:38:38,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 229 transitions. [2024-10-11 14:38:38,948 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42407407407407405 [2024-10-11 14:38:38,948 INFO L175 Difference]: Start difference. First operand has 123 places, 114 transitions, 1090 flow. Second operand 27 states and 229 transitions. [2024-10-11 14:38:38,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 206 transitions, 2043 flow [2024-10-11 14:38:38,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 206 transitions, 1845 flow, removed 58 selfloop flow, removed 19 redundant places. [2024-10-11 14:38:38,966 INFO L231 Difference]: Finished difference. Result has 130 places, 136 transitions, 1400 flow [2024-10-11 14:38:38,966 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=957, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1400, PETRI_PLACES=130, PETRI_TRANSITIONS=136} [2024-10-11 14:38:38,968 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 109 predicate places. [2024-10-11 14:38:38,968 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 136 transitions, 1400 flow [2024-10-11 14:38:38,969 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) [2024-10-11 14:38:38,969 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:38:38,969 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:38:38,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-11 14:38:39,169 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-10-11 14:38:39,170 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:38:39,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:38:39,170 INFO L85 PathProgramCache]: Analyzing trace with hash -2031939214, now seen corresponding path program 4 times [2024-10-11 14:38:39,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:38:39,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973136084] [2024-10-11 14:38:39,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:38:39,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:38:39,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:38:39,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:38:39,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:38:39,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973136084] [2024-10-11 14:38:39,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973136084] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:38:39,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545681871] [2024-10-11 14:38:39,372 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 14:38:39,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:38:39,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:38:39,376 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:38:39,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 14:38:39,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 14:38:39,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:38:39,438 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-10-11 14:38:39,440 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:38:39,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-11 14:38:39,611 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:38:39,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 41 [2024-10-11 14:38:39,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:38:39,663 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:38:40,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-10-11 14:38:40,330 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-11 14:38:40,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2024-10-11 14:38:40,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:38:40,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545681871] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:38:40,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:38:40,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 20 [2024-10-11 14:38:40,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318712049] [2024-10-11 14:38:40,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:38:40,353 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-11 14:38:40,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:38:40,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-11 14:38:40,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2024-10-11 14:38:40,354 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-11 14:38:40,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 136 transitions, 1400 flow. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:38:40,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:38:40,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-11 14:38:40,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:38:41,050 INFO L124 PetriNetUnfolderBase]: 344/795 cut-off events. [2024-10-11 14:38:41,050 INFO L125 PetriNetUnfolderBase]: For 2914/2914 co-relation queries the response was YES. [2024-10-11 14:38:41,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3852 conditions, 795 events. 344/795 cut-off events. For 2914/2914 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4650 event pairs, 3 based on Foata normal form. 7/802 useless extension candidates. Maximal degree in co-relation 3678. Up to 330 conditions per place. [2024-10-11 14:38:41,054 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 102 selfloop transitions, 91 changer transitions 8/202 dead transitions. [2024-10-11 14:38:41,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 202 transitions, 2208 flow [2024-10-11 14:38:41,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-11 14:38:41,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-10-11 14:38:41,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 160 transitions. [2024-10-11 14:38:41,056 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42105263157894735 [2024-10-11 14:38:41,056 INFO L175 Difference]: Start difference. First operand has 130 places, 136 transitions, 1400 flow. Second operand 19 states and 160 transitions. [2024-10-11 14:38:41,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 202 transitions, 2208 flow [2024-10-11 14:38:41,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 202 transitions, 2118 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-10-11 14:38:41,074 INFO L231 Difference]: Finished difference. Result has 144 places, 153 transitions, 1801 flow [2024-10-11 14:38:41,074 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1321, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1801, PETRI_PLACES=144, PETRI_TRANSITIONS=153} [2024-10-11 14:38:41,075 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 123 predicate places. [2024-10-11 14:38:41,076 INFO L471 AbstractCegarLoop]: Abstraction has has 144 places, 153 transitions, 1801 flow [2024-10-11 14:38:41,076 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:38:41,076 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:38:41,076 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:38:41,088 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-11 14:38:41,277 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-11 14:38:41,277 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:38:41,277 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:38:41,277 INFO L85 PathProgramCache]: Analyzing trace with hash 982989216, now seen corresponding path program 5 times [2024-10-11 14:38:41,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:38:41,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942422834] [2024-10-11 14:38:41,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:38:41,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:38:41,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:38:41,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:38:41,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:38:41,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942422834] [2024-10-11 14:38:41,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942422834] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:38:41,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95616551] [2024-10-11 14:38:41,381 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 14:38:41,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:38:41,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:38:41,383 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:38:41,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 14:38:41,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:38:41,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:38:41,451 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-11 14:38:41,453 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:38:41,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-11 14:38:41,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-10-11 14:38:41,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:38:41,629 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:38:42,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-10-11 14:38:42,393 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-11 14:38:42,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2024-10-11 14:38:42,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:38:42,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95616551] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:38:42,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:38:42,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2024-10-11 14:38:42,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424246099] [2024-10-11 14:38:42,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:38:42,414 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-11 14:38:42,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:38:42,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-11 14:38:42,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2024-10-11 14:38:42,415 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-11 14:38:42,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 153 transitions, 1801 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) [2024-10-11 14:38:42,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:38:42,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-11 14:38:42,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:38:43,427 INFO L124 PetriNetUnfolderBase]: 347/799 cut-off events. [2024-10-11 14:38:43,428 INFO L125 PetriNetUnfolderBase]: For 4141/4141 co-relation queries the response was YES. [2024-10-11 14:38:43,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4389 conditions, 799 events. 347/799 cut-off events. For 4141/4141 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4662 event pairs, 15 based on Foata normal form. 8/807 useless extension candidates. Maximal degree in co-relation 4192. Up to 556 conditions per place. [2024-10-11 14:38:43,434 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 116 selfloop transitions, 79 changer transitions 4/200 dead transitions. [2024-10-11 14:38:43,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 200 transitions, 2521 flow [2024-10-11 14:38:43,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-11 14:38:43,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-10-11 14:38:43,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 149 transitions. [2024-10-11 14:38:43,436 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39210526315789473 [2024-10-11 14:38:43,436 INFO L175 Difference]: Start difference. First operand has 144 places, 153 transitions, 1801 flow. Second operand 19 states and 149 transitions. [2024-10-11 14:38:43,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 200 transitions, 2521 flow [2024-10-11 14:38:43,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 200 transitions, 2354 flow, removed 34 selfloop flow, removed 14 redundant places. [2024-10-11 14:38:43,457 INFO L231 Difference]: Finished difference. Result has 153 places, 163 transitions, 2020 flow [2024-10-11 14:38:43,457 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1620, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2020, PETRI_PLACES=153, PETRI_TRANSITIONS=163} [2024-10-11 14:38:43,458 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 132 predicate places. [2024-10-11 14:38:43,458 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 163 transitions, 2020 flow [2024-10-11 14:38:43,458 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) [2024-10-11 14:38:43,458 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:38:43,458 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:38:43,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-11 14:38:43,658 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-11 14:38:43,659 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:38:43,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:38:43,659 INFO L85 PathProgramCache]: Analyzing trace with hash 183734254, now seen corresponding path program 6 times [2024-10-11 14:38:43,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:38:43,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287272685] [2024-10-11 14:38:43,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:38:43,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:38:43,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:38:43,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:38:43,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:38:43,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287272685] [2024-10-11 14:38:43,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287272685] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:38:43,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346269043] [2024-10-11 14:38:43,771 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 14:38:43,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:38:43,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:38:43,773 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:38:43,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 14:38:43,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-10-11 14:38:43,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:38:43,831 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-11 14:38:43,833 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:38:43,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-11 14:38:44,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2024-10-11 14:38:44,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:38:44,085 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:38:44,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-10-11 14:38:44,572 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-11 14:38:44,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2024-10-11 14:38:44,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 77 [2024-10-11 14:38:44,610 INFO L349 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2024-10-11 14:38:44,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 164 [2024-10-11 14:38:44,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:38:44,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346269043] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:38:44,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:38:44,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 19 [2024-10-11 14:38:44,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077324278] [2024-10-11 14:38:44,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:38:44,827 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-11 14:38:44,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:38:44,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-11 14:38:44,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2024-10-11 14:38:44,827 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-11 14:38:44,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 163 transitions, 2020 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) [2024-10-11 14:38:44,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:38:44,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-11 14:38:44,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:38:45,458 INFO L124 PetriNetUnfolderBase]: 364/851 cut-off events. [2024-10-11 14:38:45,459 INFO L125 PetriNetUnfolderBase]: For 4955/4955 co-relation queries the response was YES. [2024-10-11 14:38:45,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4863 conditions, 851 events. 364/851 cut-off events. For 4955/4955 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 5165 event pairs, 7 based on Foata normal form. 12/863 useless extension candidates. Maximal degree in co-relation 4647. Up to 204 conditions per place. [2024-10-11 14:38:45,465 INFO L140 encePairwiseOnDemand]: 10/20 looper letters, 97 selfloop transitions, 87 changer transitions 45/230 dead transitions. [2024-10-11 14:38:45,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 230 transitions, 2918 flow [2024-10-11 14:38:45,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-11 14:38:45,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-11 14:38:45,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 176 transitions. [2024-10-11 14:38:45,467 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-10-11 14:38:45,467 INFO L175 Difference]: Start difference. First operand has 153 places, 163 transitions, 2020 flow. Second operand 22 states and 176 transitions. [2024-10-11 14:38:45,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 230 transitions, 2918 flow [2024-10-11 14:38:45,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 230 transitions, 2800 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-10-11 14:38:45,491 INFO L231 Difference]: Finished difference. Result has 172 places, 147 transitions, 1926 flow [2024-10-11 14:38:45,492 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1902, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1926, PETRI_PLACES=172, PETRI_TRANSITIONS=147} [2024-10-11 14:38:45,492 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 151 predicate places. [2024-10-11 14:38:45,492 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 147 transitions, 1926 flow [2024-10-11 14:38:45,492 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) [2024-10-11 14:38:45,492 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:38:45,492 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:38:45,505 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-11 14:38:45,693 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:38:45,693 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:38:45,694 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:38:45,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1061637456, now seen corresponding path program 7 times [2024-10-11 14:38:45,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:38:45,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539145218] [2024-10-11 14:38:45,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:38:45,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:38:45,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:38:45,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 14:38:45,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:38:45,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539145218] [2024-10-11 14:38:45,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539145218] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:38:45,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729391589] [2024-10-11 14:38:45,844 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-11 14:38:45,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:38:45,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:38:45,846 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:38:45,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-11 14:38:45,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:38:45,913 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-11 14:38:45,915 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:38:45,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-11 14:38:46,065 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-11 14:38:46,066 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 117 treesize of output 104 [2024-10-11 14:38:46,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:38:46,119 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:38:46,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-10-11 14:38:46,744 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-11 14:38:46,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2024-10-11 14:38:46,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 77 [2024-10-11 14:38:46,789 INFO L349 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2024-10-11 14:38:46,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 239 treesize of output 193 [2024-10-11 14:38:47,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:38:47,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729391589] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:38:47,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:38:47,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 19 [2024-10-11 14:38:47,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939887412] [2024-10-11 14:38:47,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:38:47,110 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-11 14:38:47,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:38:47,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-11 14:38:47,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2024-10-11 14:38:47,111 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-11 14:38:47,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 147 transitions, 1926 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) [2024-10-11 14:38:47,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:38:47,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-11 14:38:47,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:38:48,048 INFO L124 PetriNetUnfolderBase]: 303/694 cut-off events. [2024-10-11 14:38:48,048 INFO L125 PetriNetUnfolderBase]: For 5153/5153 co-relation queries the response was YES. [2024-10-11 14:38:48,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4300 conditions, 694 events. 303/694 cut-off events. For 5153/5153 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3815 event pairs, 14 based on Foata normal form. 4/698 useless extension candidates. Maximal degree in co-relation 4118. Up to 455 conditions per place. [2024-10-11 14:38:48,054 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 114 selfloop transitions, 73 changer transitions 9/197 dead transitions. [2024-10-11 14:38:48,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 197 transitions, 2589 flow [2024-10-11 14:38:48,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-11 14:38:48,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-11 14:38:48,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 175 transitions. [2024-10-11 14:38:48,056 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-10-11 14:38:48,056 INFO L175 Difference]: Start difference. First operand has 172 places, 147 transitions, 1926 flow. Second operand 22 states and 175 transitions. [2024-10-11 14:38:48,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 197 transitions, 2589 flow [2024-10-11 14:38:48,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 197 transitions, 2405 flow, removed 50 selfloop flow, removed 14 redundant places. [2024-10-11 14:38:48,079 INFO L231 Difference]: Finished difference. Result has 168 places, 148 transitions, 1938 flow [2024-10-11 14:38:48,079 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1752, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1938, PETRI_PLACES=168, PETRI_TRANSITIONS=148} [2024-10-11 14:38:48,080 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 147 predicate places. [2024-10-11 14:38:48,080 INFO L471 AbstractCegarLoop]: Abstraction has has 168 places, 148 transitions, 1938 flow [2024-10-11 14:38:48,080 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) [2024-10-11 14:38:48,080 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:38:48,080 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:38:48,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-11 14:38:48,284 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-11 14:38:48,285 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:38:48,285 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:38:48,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1485004561, now seen corresponding path program 8 times [2024-10-11 14:38:48,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:38:48,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162259646] [2024-10-11 14:38:48,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:38:48,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:38:48,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:38:48,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:38:48,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:38:48,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162259646] [2024-10-11 14:38:48,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162259646] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:38:48,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669564456] [2024-10-11 14:38:48,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:38:48,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:38:48,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:38:48,588 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:38:48,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-11 14:38:48,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:38:48,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:38:48,648 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-11 14:38:48,650 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:38:48,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-11 14:38:48,840 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-11 14:38:48,841 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2024-10-11 14:38:48,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:38:48,855 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:38:49,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 116 [2024-10-11 14:38:49,180 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:38:49,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 297 treesize of output 257 [2024-10-11 14:38:50,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:38:50,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669564456] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:38:50,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:38:50,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-10-11 14:38:50,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303010564] [2024-10-11 14:38:50,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:38:50,136 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-11 14:38:50,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:38:50,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-11 14:38:50,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2024-10-11 14:38:50,137 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-11 14:38:50,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 148 transitions, 1938 flow. Second operand has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 17 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:38:50,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:38:50,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-11 14:38:50,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:38:50,328 INFO L124 PetriNetUnfolderBase]: 303/686 cut-off events. [2024-10-11 14:38:50,328 INFO L125 PetriNetUnfolderBase]: For 4065/4065 co-relation queries the response was YES. [2024-10-11 14:38:50,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4048 conditions, 686 events. 303/686 cut-off events. For 4065/4065 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3763 event pairs, 28 based on Foata normal form. 4/690 useless extension candidates. Maximal degree in co-relation 3915. Up to 541 conditions per place. [2024-10-11 14:38:50,333 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 121 selfloop transitions, 15 changer transitions 32/169 dead transitions. [2024-10-11 14:38:50,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 169 transitions, 2386 flow [2024-10-11 14:38:50,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 14:38:50,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-11 14:38:50,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 78 transitions. [2024-10-11 14:38:50,334 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-10-11 14:38:50,334 INFO L175 Difference]: Start difference. First operand has 168 places, 148 transitions, 1938 flow. Second operand 9 states and 78 transitions. [2024-10-11 14:38:50,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 169 transitions, 2386 flow [2024-10-11 14:38:50,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 169 transitions, 2257 flow, removed 7 selfloop flow, removed 14 redundant places. [2024-10-11 14:38:50,353 INFO L231 Difference]: Finished difference. Result has 163 places, 133 transitions, 1666 flow [2024-10-11 14:38:50,353 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1809, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1666, PETRI_PLACES=163, PETRI_TRANSITIONS=133} [2024-10-11 14:38:50,354 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 142 predicate places. [2024-10-11 14:38:50,354 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 133 transitions, 1666 flow [2024-10-11 14:38:50,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 17 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:38:50,354 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:38:50,354 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:38:50,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-11 14:38:50,554 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:38:50,555 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:38:50,555 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:38:50,555 INFO L85 PathProgramCache]: Analyzing trace with hash 735477053, now seen corresponding path program 9 times [2024-10-11 14:38:50,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:38:50,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456248614] [2024-10-11 14:38:50,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:38:50,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:38:50,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:38:50,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:38:50,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:38:50,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456248614] [2024-10-11 14:38:50,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456248614] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:38:50,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482588752] [2024-10-11 14:38:50,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:38:50,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:38:50,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:38:50,680 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:38:50,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-11 14:38:50,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-11 14:38:50,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:38:50,748 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-11 14:38:50,749 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:38:50,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-11 14:38:50,793 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-10-11 14:38:50,927 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:38:50,928 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 115 treesize of output 109 [2024-10-11 14:38:51,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:38:51,100 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:38:51,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2024-10-11 14:38:51,577 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-11 14:38:51,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 462 treesize of output 369 [2024-10-11 14:38:51,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:38:51,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482588752] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:38:51,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:38:51,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 23 [2024-10-11 14:38:51,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523507534] [2024-10-11 14:38:51,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:38:51,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-11 14:38:51,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:38:51,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-11 14:38:51,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2024-10-11 14:38:51,669 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-11 14:38:51,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 133 transitions, 1666 flow. Second operand has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:38:51,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:38:51,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-11 14:38:51,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:38:52,540 INFO L124 PetriNetUnfolderBase]: 279/608 cut-off events. [2024-10-11 14:38:52,541 INFO L125 PetriNetUnfolderBase]: For 3504/3504 co-relation queries the response was YES. [2024-10-11 14:38:52,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3554 conditions, 608 events. 279/608 cut-off events. For 3504/3504 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3160 event pairs, 4 based on Foata normal form. 2/610 useless extension candidates. Maximal degree in co-relation 3498. Up to 268 conditions per place. [2024-10-11 14:38:52,545 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 106 selfloop transitions, 71 changer transitions 4/182 dead transitions. [2024-10-11 14:38:52,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 182 transitions, 2313 flow [2024-10-11 14:38:52,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-11 14:38:52,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-11 14:38:52,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 146 transitions. [2024-10-11 14:38:52,546 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4294117647058823 [2024-10-11 14:38:52,546 INFO L175 Difference]: Start difference. First operand has 163 places, 133 transitions, 1666 flow. Second operand 17 states and 146 transitions. [2024-10-11 14:38:52,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 182 transitions, 2313 flow [2024-10-11 14:38:52,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 182 transitions, 2158 flow, removed 11 selfloop flow, removed 18 redundant places. [2024-10-11 14:38:52,562 INFO L231 Difference]: Finished difference. Result has 143 places, 134 transitions, 1685 flow [2024-10-11 14:38:52,562 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1524, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1685, PETRI_PLACES=143, PETRI_TRANSITIONS=134} [2024-10-11 14:38:52,562 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 122 predicate places. [2024-10-11 14:38:52,563 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 134 transitions, 1685 flow [2024-10-11 14:38:52,563 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:38:52,563 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:38:52,563 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:38:52,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-11 14:38:52,763 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-11 14:38:52,763 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:38:52,764 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:38:52,764 INFO L85 PathProgramCache]: Analyzing trace with hash -185805142, now seen corresponding path program 2 times [2024-10-11 14:38:52,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:38:52,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330940766] [2024-10-11 14:38:52,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:38:52,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:38:52,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:38:52,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:38:52,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:38:52,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330940766] [2024-10-11 14:38:52,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330940766] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:38:52,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799180937] [2024-10-11 14:38:52,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:38:52,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:38:52,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:38:52,867 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:38:52,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-11 14:38:52,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:38:52,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:38:52,963 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 14:38:52,964 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:38:52,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:38:52,992 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:38:53,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:38:53,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799180937] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:38:53,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:38:53,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-10-11 14:38:53,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096313296] [2024-10-11 14:38:53,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:38:53,084 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-11 14:38:53,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:38:53,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-11 14:38:53,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2024-10-11 14:38:53,085 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-11 14:38:53,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 134 transitions, 1685 flow. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:38:53,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:38:53,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-11 14:38:53,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:38:55,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-11 14:38:55,312 INFO L124 PetriNetUnfolderBase]: 309/652 cut-off events. [2024-10-11 14:38:55,313 INFO L125 PetriNetUnfolderBase]: For 3763/3763 co-relation queries the response was YES. [2024-10-11 14:38:55,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3811 conditions, 652 events. 309/652 cut-off events. For 3763/3763 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3399 event pairs, 34 based on Foata normal form. 12/664 useless extension candidates. Maximal degree in co-relation 3746. Up to 186 conditions per place. [2024-10-11 14:38:55,318 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 118 selfloop transitions, 82 changer transitions 0/201 dead transitions. [2024-10-11 14:38:55,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 201 transitions, 2518 flow [2024-10-11 14:38:55,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-11 14:38:55,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-11 14:38:55,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 151 transitions. [2024-10-11 14:38:55,320 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4441176470588235 [2024-10-11 14:38:55,320 INFO L175 Difference]: Start difference. First operand has 143 places, 134 transitions, 1685 flow. Second operand 17 states and 151 transitions. [2024-10-11 14:38:55,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 201 transitions, 2518 flow [2024-10-11 14:38:55,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 201 transitions, 2349 flow, removed 8 selfloop flow, removed 13 redundant places. [2024-10-11 14:38:55,338 INFO L231 Difference]: Finished difference. Result has 148 places, 157 transitions, 1992 flow [2024-10-11 14:38:55,338 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1528, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1992, PETRI_PLACES=148, PETRI_TRANSITIONS=157} [2024-10-11 14:38:55,340 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 127 predicate places. [2024-10-11 14:38:55,340 INFO L471 AbstractCegarLoop]: Abstraction has has 148 places, 157 transitions, 1992 flow [2024-10-11 14:38:55,341 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:38:55,341 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:38:55,341 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:38:55,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-11 14:38:55,541 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-11 14:38:55,541 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:38:55,542 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:38:55,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1218152665, now seen corresponding path program 10 times [2024-10-11 14:38:55,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:38:55,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23936538] [2024-10-11 14:38:55,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:38:55,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:38:55,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:38:55,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:38:55,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:38:55,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23936538] [2024-10-11 14:38:55,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23936538] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:38:55,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625156224] [2024-10-11 14:38:55,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 14:38:55,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:38:55,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:38:55,695 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:38:55,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-11 14:38:55,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 14:38:55,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:38:55,762 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-11 14:38:55,763 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:38:55,853 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:38:55,854 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 117 treesize of output 109 [2024-10-11 14:38:56,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:38:56,017 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:38:56,272 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:38:56,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 150 treesize of output 119 [2024-10-11 14:38:56,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:38:56,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625156224] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:38:56,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:38:56,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2024-10-11 14:38:56,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589885847] [2024-10-11 14:38:56,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:38:56,535 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-11 14:38:56,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:38:56,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-11 14:38:56,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2024-10-11 14:38:56,535 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-11 14:38:56,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 157 transitions, 1992 flow. Second operand has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 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) [2024-10-11 14:38:56,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:38:56,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-11 14:38:56,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:38:57,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-11 14:38:58,081 INFO L124 PetriNetUnfolderBase]: 308/645 cut-off events. [2024-10-11 14:38:58,081 INFO L125 PetriNetUnfolderBase]: For 3550/3550 co-relation queries the response was YES. [2024-10-11 14:38:58,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3882 conditions, 645 events. 308/645 cut-off events. For 3550/3550 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3300 event pairs, 12 based on Foata normal form. 2/647 useless extension candidates. Maximal degree in co-relation 3817. Up to 462 conditions per place. [2024-10-11 14:38:58,085 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 139 selfloop transitions, 36 changer transitions 4/180 dead transitions. [2024-10-11 14:38:58,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 180 transitions, 2413 flow [2024-10-11 14:38:58,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 14:38:58,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-11 14:38:58,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 105 transitions. [2024-10-11 14:38:58,086 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-10-11 14:38:58,086 INFO L175 Difference]: Start difference. First operand has 148 places, 157 transitions, 1992 flow. Second operand 12 states and 105 transitions. [2024-10-11 14:38:58,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 180 transitions, 2413 flow [2024-10-11 14:38:58,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 180 transitions, 2273 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-10-11 14:38:58,104 INFO L231 Difference]: Finished difference. Result has 153 places, 156 transitions, 1919 flow [2024-10-11 14:38:58,104 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1843, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1919, PETRI_PLACES=153, PETRI_TRANSITIONS=156} [2024-10-11 14:38:58,105 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 132 predicate places. [2024-10-11 14:38:58,105 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 156 transitions, 1919 flow [2024-10-11 14:38:58,105 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 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) [2024-10-11 14:38:58,105 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:38:58,105 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:38:58,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-11 14:38:58,309 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-11 14:38:58,310 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:38:58,310 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:38:58,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1444358378, now seen corresponding path program 3 times [2024-10-11 14:38:58,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:38:58,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481948724] [2024-10-11 14:38:58,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:38:58,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:38:58,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:38:58,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:38:58,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:38:58,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481948724] [2024-10-11 14:38:58,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481948724] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:38:58,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185740183] [2024-10-11 14:38:58,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 14:38:58,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:38:58,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:38:58,469 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:38:58,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-11 14:38:58,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-11 14:38:58,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:38:58,560 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 14:38:58,562 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:38:58,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:38:58,595 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:38:58,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:38:58,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185740183] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:38:58,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:38:58,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2024-10-11 14:38:58,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488130609] [2024-10-11 14:38:58,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:38:58,685 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-11 14:38:58,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:38:58,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-11 14:38:58,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2024-10-11 14:38:58,686 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-11 14:38:58,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 156 transitions, 1919 flow. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:38:58,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:38:58,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-11 14:38:58,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:38:59,496 INFO L124 PetriNetUnfolderBase]: 373/764 cut-off events. [2024-10-11 14:38:59,496 INFO L125 PetriNetUnfolderBase]: For 4041/4041 co-relation queries the response was YES. [2024-10-11 14:38:59,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4419 conditions, 764 events. 373/764 cut-off events. For 4041/4041 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 4073 event pairs, 68 based on Foata normal form. 8/772 useless extension candidates. Maximal degree in co-relation 4354. Up to 337 conditions per place. [2024-10-11 14:38:59,502 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 144 selfloop transitions, 83 changer transitions 0/228 dead transitions. [2024-10-11 14:38:59,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 228 transitions, 2844 flow [2024-10-11 14:38:59,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-11 14:38:59,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-10-11 14:38:59,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 151 transitions. [2024-10-11 14:38:59,505 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.471875 [2024-10-11 14:38:59,505 INFO L175 Difference]: Start difference. First operand has 153 places, 156 transitions, 1919 flow. Second operand 16 states and 151 transitions. [2024-10-11 14:38:59,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 228 transitions, 2844 flow [2024-10-11 14:38:59,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 228 transitions, 2776 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-10-11 14:38:59,523 INFO L231 Difference]: Finished difference. Result has 165 places, 183 transitions, 2402 flow [2024-10-11 14:38:59,523 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1865, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2402, PETRI_PLACES=165, PETRI_TRANSITIONS=183} [2024-10-11 14:38:59,524 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 144 predicate places. [2024-10-11 14:38:59,524 INFO L471 AbstractCegarLoop]: Abstraction has has 165 places, 183 transitions, 2402 flow [2024-10-11 14:38:59,524 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:38:59,524 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:38:59,524 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:38:59,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-10-11 14:38:59,728 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-11 14:38:59,728 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:38:59,729 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:38:59,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1365710138, now seen corresponding path program 4 times [2024-10-11 14:38:59,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:38:59,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088889151] [2024-10-11 14:38:59,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:38:59,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:38:59,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:38:59,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:38:59,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:38:59,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088889151] [2024-10-11 14:38:59,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088889151] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:38:59,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826200320] [2024-10-11 14:38:59,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 14:38:59,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:38:59,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:38:59,855 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:38:59,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-11 14:38:59,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-11 14:38:59,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:38:59,944 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 14:38:59,945 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:38:59,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:38:59,980 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:39:00,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:39:00,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826200320] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:39:00,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:39:00,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-10-11 14:39:00,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213716994] [2024-10-11 14:39:00,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:39:00,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-11 14:39:00,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:39:00,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-11 14:39:00,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-10-11 14:39:00,078 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-11 14:39:00,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 183 transitions, 2402 flow. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:39:00,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:39:00,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-11 14:39:00,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:39:00,557 INFO L124 PetriNetUnfolderBase]: 359/744 cut-off events. [2024-10-11 14:39:00,557 INFO L125 PetriNetUnfolderBase]: For 4657/4657 co-relation queries the response was YES. [2024-10-11 14:39:00,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4550 conditions, 744 events. 359/744 cut-off events. For 4657/4657 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3989 event pairs, 68 based on Foata normal form. 15/759 useless extension candidates. Maximal degree in co-relation 4479. Up to 337 conditions per place. [2024-10-11 14:39:00,562 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 144 selfloop transitions, 82 changer transitions 0/227 dead transitions. [2024-10-11 14:39:00,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 227 transitions, 2960 flow [2024-10-11 14:39:00,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-11 14:39:00,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-10-11 14:39:00,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 168 transitions. [2024-10-11 14:39:00,564 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4421052631578947 [2024-10-11 14:39:00,564 INFO L175 Difference]: Start difference. First operand has 165 places, 183 transitions, 2402 flow. Second operand 19 states and 168 transitions. [2024-10-11 14:39:00,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 227 transitions, 2960 flow [2024-10-11 14:39:00,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 227 transitions, 2876 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-10-11 14:39:00,586 INFO L231 Difference]: Finished difference. Result has 181 places, 181 transitions, 2463 flow [2024-10-11 14:39:00,586 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2237, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2463, PETRI_PLACES=181, PETRI_TRANSITIONS=181} [2024-10-11 14:39:00,586 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 160 predicate places. [2024-10-11 14:39:00,586 INFO L471 AbstractCegarLoop]: Abstraction has has 181 places, 181 transitions, 2463 flow [2024-10-11 14:39:00,587 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:39:00,587 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:39:00,587 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:39:00,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-10-11 14:39:00,787 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:39:00,787 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:39:00,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:39:00,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1490242104, now seen corresponding path program 5 times [2024-10-11 14:39:00,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:39:00,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029152656] [2024-10-11 14:39:00,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:39:00,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:39:00,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:39:00,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:39:00,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:39:00,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029152656] [2024-10-11 14:39:00,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029152656] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:39:00,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178414836] [2024-10-11 14:39:00,927 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 14:39:00,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:39:00,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:39:00,929 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:39:00,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-11 14:39:01,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:39:01,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:39:01,024 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 14:39:01,026 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:39:01,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:39:01,074 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:39:01,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:39:01,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178414836] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:39:01,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:39:01,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-10-11 14:39:01,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836016237] [2024-10-11 14:39:01,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:39:01,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-11 14:39:01,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:39:01,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-11 14:39:01,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2024-10-11 14:39:01,134 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-11 14:39:01,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 181 transitions, 2463 flow. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:39:01,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:39:01,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-11 14:39:01,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:39:01,749 INFO L124 PetriNetUnfolderBase]: 644/1300 cut-off events. [2024-10-11 14:39:01,749 INFO L125 PetriNetUnfolderBase]: For 8506/8506 co-relation queries the response was YES. [2024-10-11 14:39:01,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8041 conditions, 1300 events. 644/1300 cut-off events. For 8506/8506 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 7750 event pairs, 36 based on Foata normal form. 8/1308 useless extension candidates. Maximal degree in co-relation 7969. Up to 381 conditions per place. [2024-10-11 14:39:01,759 INFO L140 encePairwiseOnDemand]: 13/20 looper letters, 189 selfloop transitions, 166 changer transitions 0/356 dead transitions. [2024-10-11 14:39:01,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 356 transitions, 5111 flow [2024-10-11 14:39:01,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-10-11 14:39:01,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-10-11 14:39:01,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 179 transitions. [2024-10-11 14:39:01,762 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4710526315789474 [2024-10-11 14:39:01,762 INFO L175 Difference]: Start difference. First operand has 181 places, 181 transitions, 2463 flow. Second operand 19 states and 179 transitions. [2024-10-11 14:39:01,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 356 transitions, 5111 flow [2024-10-11 14:39:01,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 356 transitions, 4898 flow, removed 24 selfloop flow, removed 12 redundant places. [2024-10-11 14:39:01,800 INFO L231 Difference]: Finished difference. Result has 196 places, 269 transitions, 4160 flow [2024-10-11 14:39:01,801 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2331, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4160, PETRI_PLACES=196, PETRI_TRANSITIONS=269} [2024-10-11 14:39:01,801 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 175 predicate places. [2024-10-11 14:39:01,801 INFO L471 AbstractCegarLoop]: Abstraction has has 196 places, 269 transitions, 4160 flow [2024-10-11 14:39:01,801 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:39:01,801 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:39:01,802 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:39:01,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-10-11 14:39:02,002 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:39:02,003 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:39:02,003 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:39:02,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1490836750, now seen corresponding path program 6 times [2024-10-11 14:39:02,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:39:02,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359569818] [2024-10-11 14:39:02,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:39:02,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:39:02,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:39:02,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:39:02,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:39:02,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359569818] [2024-10-11 14:39:02,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359569818] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:39:02,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27515270] [2024-10-11 14:39:02,139 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-11 14:39:02,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:39:02,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:39:02,140 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:39:02,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-11 14:39:02,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-10-11 14:39:02,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:39:02,235 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 14:39:02,238 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:39:02,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:39:02,290 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:39:02,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:39:02,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27515270] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:39:02,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:39:02,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-10-11 14:39:02,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221376738] [2024-10-11 14:39:02,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:39:02,346 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-11 14:39:02,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:39:02,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-11 14:39:02,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-10-11 14:39:02,346 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-11 14:39:02,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 269 transitions, 4160 flow. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:39:02,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:39:02,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-11 14:39:02,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:39:02,911 INFO L124 PetriNetUnfolderBase]: 641/1279 cut-off events. [2024-10-11 14:39:02,911 INFO L125 PetriNetUnfolderBase]: For 10687/10687 co-relation queries the response was YES. [2024-10-11 14:39:02,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8736 conditions, 1279 events. 641/1279 cut-off events. For 10687/10687 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 7471 event pairs, 31 based on Foata normal form. 6/1285 useless extension candidates. Maximal degree in co-relation 8657. Up to 450 conditions per place. [2024-10-11 14:39:02,922 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 184 selfloop transitions, 154 changer transitions 0/339 dead transitions. [2024-10-11 14:39:02,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 339 transitions, 5515 flow [2024-10-11 14:39:02,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-11 14:39:02,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-10-11 14:39:02,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 147 transitions. [2024-10-11 14:39:02,923 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.459375 [2024-10-11 14:39:02,923 INFO L175 Difference]: Start difference. First operand has 196 places, 269 transitions, 4160 flow. Second operand 16 states and 147 transitions. [2024-10-11 14:39:02,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 339 transitions, 5515 flow [2024-10-11 14:39:02,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 339 transitions, 5253 flow, removed 78 selfloop flow, removed 9 redundant places. [2024-10-11 14:39:02,978 INFO L231 Difference]: Finished difference. Result has 206 places, 277 transitions, 4363 flow [2024-10-11 14:39:02,978 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3900, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4363, PETRI_PLACES=206, PETRI_TRANSITIONS=277} [2024-10-11 14:39:02,978 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 185 predicate places. [2024-10-11 14:39:02,979 INFO L471 AbstractCegarLoop]: Abstraction has has 206 places, 277 transitions, 4363 flow [2024-10-11 14:39:02,979 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:39:02,979 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:39:02,979 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:39:02,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-10-11 14:39:03,183 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-10-11 14:39:03,184 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:39:03,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:39:03,184 INFO L85 PathProgramCache]: Analyzing trace with hash 2048302352, now seen corresponding path program 7 times [2024-10-11 14:39:03,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:39:03,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167871109] [2024-10-11 14:39:03,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:39:03,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:39:03,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:39:03,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:39:03,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:39:03,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167871109] [2024-10-11 14:39:03,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167871109] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:39:03,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116904418] [2024-10-11 14:39:03,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-11 14:39:03,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:39:03,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:39:03,276 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:39:03,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-11 14:39:03,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:39:03,365 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 14:39:03,366 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:39:03,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:39:03,396 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:39:03,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:39:03,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116904418] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:39:03,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:39:03,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-10-11 14:39:03,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476078677] [2024-10-11 14:39:03,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:39:03,500 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-11 14:39:03,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:39:03,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-11 14:39:03,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-10-11 14:39:03,501 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-11 14:39:03,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 277 transitions, 4363 flow. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:39:03,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:39:03,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-11 14:39:03,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:39:04,653 INFO L124 PetriNetUnfolderBase]: 643/1293 cut-off events. [2024-10-11 14:39:04,654 INFO L125 PetriNetUnfolderBase]: For 11426/11426 co-relation queries the response was YES. [2024-10-11 14:39:04,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9024 conditions, 1293 events. 643/1293 cut-off events. For 11426/11426 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 7655 event pairs, 91 based on Foata normal form. 18/1311 useless extension candidates. Maximal degree in co-relation 8942. Up to 476 conditions per place. [2024-10-11 14:39:04,662 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 185 selfloop transitions, 140 changer transitions 0/326 dead transitions. [2024-10-11 14:39:04,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 326 transitions, 5443 flow [2024-10-11 14:39:04,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-11 14:39:04,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-10-11 14:39:04,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 132 transitions. [2024-10-11 14:39:04,665 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-10-11 14:39:04,665 INFO L175 Difference]: Start difference. First operand has 206 places, 277 transitions, 4363 flow. Second operand 16 states and 132 transitions. [2024-10-11 14:39:04,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 326 transitions, 5443 flow [2024-10-11 14:39:04,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 326 transitions, 5307 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-10-11 14:39:04,715 INFO L231 Difference]: Finished difference. Result has 219 places, 286 transitions, 4668 flow [2024-10-11 14:39:04,715 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=4221, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4668, PETRI_PLACES=219, PETRI_TRANSITIONS=286} [2024-10-11 14:39:04,716 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 198 predicate places. [2024-10-11 14:39:04,716 INFO L471 AbstractCegarLoop]: Abstraction has has 219 places, 286 transitions, 4668 flow [2024-10-11 14:39:04,716 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:39:04,716 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:39:04,716 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:39:04,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-10-11 14:39:04,916 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:39:04,916 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:39:04,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:39:04,917 INFO L85 PathProgramCache]: Analyzing trace with hash 156485653, now seen corresponding path program 11 times [2024-10-11 14:39:04,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:39:04,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325139500] [2024-10-11 14:39:04,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:39:04,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:39:04,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:39:05,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:39:05,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:39:05,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325139500] [2024-10-11 14:39:05,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325139500] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:39:05,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845882719] [2024-10-11 14:39:05,050 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-11 14:39:05,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:39:05,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:39:05,051 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:39:05,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-10-11 14:39:05,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:39:05,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:39:05,124 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-11 14:39:05,126 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:39:05,330 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:39:05,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 44 [2024-10-11 14:39:05,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:39:05,379 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:39:05,689 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 14:39:05,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 154 treesize of output 154 [2024-10-11 14:39:06,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:39:06,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845882719] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:39:06,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:39:06,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 18 [2024-10-11 14:39:06,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102969945] [2024-10-11 14:39:06,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:39:06,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-11 14:39:06,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:39:06,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-11 14:39:06,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-10-11 14:39:06,279 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-11 14:39:06,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 286 transitions, 4668 flow. Second operand has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 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) [2024-10-11 14:39:06,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:39:06,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-11 14:39:06,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:39:06,925 INFO L124 PetriNetUnfolderBase]: 648/1307 cut-off events. [2024-10-11 14:39:06,925 INFO L125 PetriNetUnfolderBase]: For 12128/12128 co-relation queries the response was YES. [2024-10-11 14:39:06,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9415 conditions, 1307 events. 648/1307 cut-off events. For 12128/12128 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 7779 event pairs, 3 based on Foata normal form. 3/1310 useless extension candidates. Maximal degree in co-relation 9330. Up to 818 conditions per place. [2024-10-11 14:39:06,936 INFO L140 encePairwiseOnDemand]: 11/20 looper letters, 191 selfloop transitions, 126 changer transitions 4/322 dead transitions. [2024-10-11 14:39:06,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 322 transitions, 5488 flow [2024-10-11 14:39:06,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-11 14:39:06,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-11 14:39:06,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 132 transitions. [2024-10-11 14:39:06,941 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38823529411764707 [2024-10-11 14:39:06,941 INFO L175 Difference]: Start difference. First operand has 219 places, 286 transitions, 4668 flow. Second operand 17 states and 132 transitions. [2024-10-11 14:39:06,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 322 transitions, 5488 flow [2024-10-11 14:39:07,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 322 transitions, 5296 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-10-11 14:39:07,006 INFO L231 Difference]: Finished difference. Result has 231 places, 287 transitions, 4763 flow [2024-10-11 14:39:07,006 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=4466, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4763, PETRI_PLACES=231, PETRI_TRANSITIONS=287} [2024-10-11 14:39:07,007 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 210 predicate places. [2024-10-11 14:39:07,007 INFO L471 AbstractCegarLoop]: Abstraction has has 231 places, 287 transitions, 4763 flow [2024-10-11 14:39:07,007 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 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) [2024-10-11 14:39:07,007 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:39:07,007 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:39:07,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-10-11 14:39:07,208 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-10-11 14:39:07,208 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-11 14:39:07,208 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:39:07,208 INFO L85 PathProgramCache]: Analyzing trace with hash -695149664, now seen corresponding path program 8 times [2024-10-11 14:39:07,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:39:07,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382567677] [2024-10-11 14:39:07,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:39:07,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:39:07,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:39:07,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:39:07,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:39:07,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382567677] [2024-10-11 14:39:07,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382567677] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:39:07,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27856987] [2024-10-11 14:39:07,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:39:07,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:39:07,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:39:07,348 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 14:39:07,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-10-11 14:39:07,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:39:07,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:39:07,441 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 14:39:07,442 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:39:07,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:39:07,476 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:39:07,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 14:39:07,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27856987] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:39:07,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:39:07,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-10-11 14:39:07,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47549062] [2024-10-11 14:39:07,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:39:07,572 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-11 14:39:07,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:39:07,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-11 14:39:07,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-10-11 14:39:07,573 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2024-10-11 14:39:07,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 287 transitions, 4763 flow. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:39:07,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:39:07,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2024-10-11 14:39:07,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:39:08,131 INFO L124 PetriNetUnfolderBase]: 750/1498 cut-off events. [2024-10-11 14:39:08,131 INFO L125 PetriNetUnfolderBase]: For 16872/16872 co-relation queries the response was YES. [2024-10-11 14:39:08,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11109 conditions, 1498 events. 750/1498 cut-off events. For 16872/16872 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 9160 event pairs, 154 based on Foata normal form. 24/1522 useless extension candidates. Maximal degree in co-relation 11019. Up to 884 conditions per place. [2024-10-11 14:39:08,143 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 230 selfloop transitions, 146 changer transitions 0/377 dead transitions. [2024-10-11 14:39:08,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 377 transitions, 6615 flow [2024-10-11 14:39:08,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-11 14:39:08,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-10-11 14:39:08,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 148 transitions. [2024-10-11 14:39:08,145 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4111111111111111 [2024-10-11 14:39:08,145 INFO L175 Difference]: Start difference. First operand has 231 places, 287 transitions, 4763 flow. Second operand 18 states and 148 transitions. [2024-10-11 14:39:08,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 377 transitions, 6615 flow [2024-10-11 14:39:08,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 377 transitions, 6522 flow, removed 18 selfloop flow, removed 11 redundant places. [2024-10-11 14:39:08,226 INFO L231 Difference]: Finished difference. Result has 243 places, 330 transitions, 5953 flow [2024-10-11 14:39:08,226 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=4653, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=5953, PETRI_PLACES=243, PETRI_TRANSITIONS=330} [2024-10-11 14:39:08,227 INFO L277 CegarLoopForPetriNet]: 21 programPoint places, 222 predicate places. [2024-10-11 14:39:08,227 INFO L471 AbstractCegarLoop]: Abstraction has has 243 places, 330 transitions, 5953 flow [2024-10-11 14:39:08,227 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:39:08,227 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:39:08,227 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:39:08,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0