./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/09_fmaxsym-pthread.i --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/pthread-ext/09_fmaxsym-pthread.i -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 e78822126ecf610a8f2b081cd67f0280b0032e707126b95c500c0e8fa18b6e03 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 14:10:49,000 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 14:10:49,052 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-11 14:10:49,058 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 14:10:49,059 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 14:10:49,084 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 14:10:49,084 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 14:10:49,084 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 14:10:49,085 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 14:10:49,085 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 14:10:49,085 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 14:10:49,086 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 14:10:49,086 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 14:10:49,086 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 14:10:49,087 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 14:10:49,087 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 14:10:49,087 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-11 14:10:49,087 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 14:10:49,088 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 14:10:49,089 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 14:10:49,092 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 14:10:49,093 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-11 14:10:49,093 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 14:10:49,093 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-11 14:10:49,093 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 14:10:49,094 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 14:10:49,094 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-11 14:10:49,094 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 14:10:49,094 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 14:10:49,094 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 14:10:49,095 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 14:10:49,095 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 14:10:49,095 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:10:49,095 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 14:10:49,095 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 14:10:49,095 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-11 14:10:49,096 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 14:10:49,096 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 14:10:49,096 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 14:10:49,096 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 14:10:49,096 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 14:10:49,096 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 14:10:49,097 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e78822126ecf610a8f2b081cd67f0280b0032e707126b95c500c0e8fa18b6e03 [2024-10-11 14:10:49,291 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 14:10:49,309 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 14:10:49,312 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 14:10:49,313 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 14:10:49,313 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 14:10:49,314 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/09_fmaxsym-pthread.i [2024-10-11 14:10:50,546 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 14:10:50,738 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 14:10:50,739 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/09_fmaxsym-pthread.i [2024-10-11 14:10:50,748 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/89da81182/df4504eee94f4deea70beb1d950dbca4/FLAGf6a2dfaee [2024-10-11 14:10:51,121 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/89da81182/df4504eee94f4deea70beb1d950dbca4 [2024-10-11 14:10:51,123 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 14:10:51,124 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 14:10:51,125 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 14:10:51,125 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 14:10:51,129 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 14:10:51,129 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:10:51" (1/1) ... [2024-10-11 14:10:51,131 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@719c24de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:10:51, skipping insertion in model container [2024-10-11 14:10:51,131 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:10:51" (1/1) ... [2024-10-11 14:10:51,166 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 14:10:51,442 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/pthread-ext/09_fmaxsym-pthread.i[30754,30767] [2024-10-11 14:10:51,455 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:10:51,464 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 14:10:51,499 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/pthread-ext/09_fmaxsym-pthread.i[30754,30767] [2024-10-11 14:10:51,503 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 14:10:51,535 INFO L204 MainTranslator]: Completed translation [2024-10-11 14:10:51,535 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:10:51 WrapperNode [2024-10-11 14:10:51,535 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 14:10:51,536 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 14:10:51,536 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 14:10:51,537 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 14:10:51,543 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:10:51" (1/1) ... [2024-10-11 14:10:51,553 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:10:51" (1/1) ... [2024-10-11 14:10:51,570 INFO L138 Inliner]: procedures = 164, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 91 [2024-10-11 14:10:51,570 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 14:10:51,570 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 14:10:51,571 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 14:10:51,571 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 14:10:51,578 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:10:51" (1/1) ... [2024-10-11 14:10:51,578 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:10:51" (1/1) ... [2024-10-11 14:10:51,580 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:10:51" (1/1) ... [2024-10-11 14:10:51,590 INFO L175 MemorySlicer]: Split 15 memory accesses to 3 slices as follows [2, 5, 8]. 53 percent of accesses are in the largest equivalence class. The 13 initializations are split as follows [2, 5, 6]. The 1 writes are split as follows [0, 0, 1]. [2024-10-11 14:10:51,590 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:10:51" (1/1) ... [2024-10-11 14:10:51,591 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:10:51" (1/1) ... [2024-10-11 14:10:51,597 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:10:51" (1/1) ... [2024-10-11 14:10:51,603 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:10:51" (1/1) ... [2024-10-11 14:10:51,604 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:10:51" (1/1) ... [2024-10-11 14:10:51,605 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:10:51" (1/1) ... [2024-10-11 14:10:51,607 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 14:10:51,607 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 14:10:51,607 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 14:10:51,608 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 14:10:51,609 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:10:51" (1/1) ... [2024-10-11 14:10:51,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 14:10:51,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:10:51,651 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 14:10:51,658 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 14:10:51,693 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 14:10:51,693 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 14:10:51,693 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-11 14:10:51,693 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-10-11 14:10:51,694 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-10-11 14:10:51,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 14:10:51,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 14:10:51,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-11 14:10:51,695 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-11 14:10:51,695 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 14:10:51,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 14:10:51,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 14:10:51,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-11 14:10:51,695 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-11 14:10:51,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 14:10:51,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 14:10:51,696 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 14:10:51,814 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 14:10:51,816 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 14:10:51,952 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 14:10:51,952 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 14:10:52,072 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 14:10:52,073 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-11 14:10:52,073 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:10:52 BoogieIcfgContainer [2024-10-11 14:10:52,074 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 14:10:52,076 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 14:10:52,076 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 14:10:52,078 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 14:10:52,078 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:10:51" (1/3) ... [2024-10-11 14:10:52,079 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1995bff3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:10:52, skipping insertion in model container [2024-10-11 14:10:52,080 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:10:51" (2/3) ... [2024-10-11 14:10:52,080 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1995bff3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:10:52, skipping insertion in model container [2024-10-11 14:10:52,080 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:10:52" (3/3) ... [2024-10-11 14:10:52,081 INFO L112 eAbstractionObserver]: Analyzing ICFG 09_fmaxsym-pthread.i [2024-10-11 14:10:52,094 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 14:10:52,094 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-11 14:10:52,094 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 14:10:52,122 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 14:10:52,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 23 places, 23 transitions, 50 flow [2024-10-11 14:10:52,174 INFO L124 PetriNetUnfolderBase]: 3/25 cut-off events. [2024-10-11 14:10:52,174 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 14:10:52,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 25 events. 3/25 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 24 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2024-10-11 14:10:52,176 INFO L82 GeneralOperation]: Start removeDead. Operand has 23 places, 23 transitions, 50 flow [2024-10-11 14:10:52,180 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 23 transitions, 50 flow [2024-10-11 14:10:52,187 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:10:52,193 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;@3dca5089, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:10:52,194 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-11 14:10:52,200 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:10:52,202 INFO L124 PetriNetUnfolderBase]: 1/13 cut-off events. [2024-10-11 14:10:52,202 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 14:10:52,202 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:10:52,203 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-10-11 14:10:52,203 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 14:10:52,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:10:52,207 INFO L85 PathProgramCache]: Analyzing trace with hash -531527673, now seen corresponding path program 1 times [2024-10-11 14:10:52,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:10:52,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46487071] [2024-10-11 14:10:52,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:10:52,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:10:52,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:10:52,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:10:52,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:10:52,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46487071] [2024-10-11 14:10:52,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46487071] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:10:52,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:10:52,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 14:10:52,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646667661] [2024-10-11 14:10:52,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:10:52,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:10:52,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:10:52,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:10:52,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:10:52,419 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 23 [2024-10-11 14:10:52,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 23 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:10:52,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:10:52,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 23 [2024-10-11 14:10:52,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:10:52,474 INFO L124 PetriNetUnfolderBase]: 20/67 cut-off events. [2024-10-11 14:10:52,474 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 14:10:52,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 67 events. 20/67 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 136 event pairs, 16 based on Foata normal form. 3/63 useless extension candidates. Maximal degree in co-relation 105. Up to 51 conditions per place. [2024-10-11 14:10:52,476 INFO L140 encePairwiseOnDemand]: 18/23 looper letters, 14 selfloop transitions, 2 changer transitions 0/22 dead transitions. [2024-10-11 14:10:52,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 22 transitions, 80 flow [2024-10-11 14:10:52,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:10:52,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:10:52,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 37 transitions. [2024-10-11 14:10:52,484 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5362318840579711 [2024-10-11 14:10:52,485 INFO L175 Difference]: Start difference. First operand has 23 places, 23 transitions, 50 flow. Second operand 3 states and 37 transitions. [2024-10-11 14:10:52,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 22 transitions, 80 flow [2024-10-11 14:10:52,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 22 transitions, 80 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 14:10:52,492 INFO L231 Difference]: Finished difference. Result has 25 places, 22 transitions, 58 flow [2024-10-11 14:10:52,494 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=25, PETRI_TRANSITIONS=22} [2024-10-11 14:10:52,497 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 2 predicate places. [2024-10-11 14:10:52,497 INFO L471 AbstractCegarLoop]: Abstraction has has 25 places, 22 transitions, 58 flow [2024-10-11 14:10:52,497 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:10:52,497 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:10:52,497 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-10-11 14:10:52,498 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 14:10:52,498 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 14:10:52,498 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:10:52,498 INFO L85 PathProgramCache]: Analyzing trace with hash 211174233, now seen corresponding path program 1 times [2024-10-11 14:10:52,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:10:52,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350456909] [2024-10-11 14:10:52,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:10:52,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:10:52,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:10:52,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:10:52,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:10:52,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350456909] [2024-10-11 14:10:52,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350456909] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:10:52,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705253984] [2024-10-11 14:10:52,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:10:52,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:10:52,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:10:52,595 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 14:10:52,612 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 14:10:52,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:10:52,688 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-11 14:10:52,691 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:10:52,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:10:52,723 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:10:52,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:10:52,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705253984] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:10:52,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:10:52,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-11 14:10:52,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010902847] [2024-10-11 14:10:52,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:10:52,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:10:52,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:10:52,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:10:52,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-11 14:10:52,744 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 23 [2024-10-11 14:10:52,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 58 flow. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:10:52,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:10:52,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 23 [2024-10-11 14:10:52,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:10:52,814 INFO L124 PetriNetUnfolderBase]: 20/70 cut-off events. [2024-10-11 14:10:52,814 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 14:10:52,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 70 events. 20/70 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 136 event pairs, 16 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 127. Up to 51 conditions per place. [2024-10-11 14:10:52,815 INFO L140 encePairwiseOnDemand]: 20/23 looper letters, 14 selfloop transitions, 5 changer transitions 0/25 dead transitions. [2024-10-11 14:10:52,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 25 transitions, 108 flow [2024-10-11 14:10:52,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:10:52,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:10:52,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 58 transitions. [2024-10-11 14:10:52,817 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42028985507246375 [2024-10-11 14:10:52,817 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 58 flow. Second operand 6 states and 58 transitions. [2024-10-11 14:10:52,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 25 transitions, 108 flow [2024-10-11 14:10:52,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 25 transitions, 104 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-11 14:10:52,819 INFO L231 Difference]: Finished difference. Result has 32 places, 25 transitions, 90 flow [2024-10-11 14:10:52,819 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=90, PETRI_PLACES=32, PETRI_TRANSITIONS=25} [2024-10-11 14:10:52,819 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 9 predicate places. [2024-10-11 14:10:52,820 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 25 transitions, 90 flow [2024-10-11 14:10:52,820 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:10:52,820 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:10:52,820 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2024-10-11 14:10:52,834 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 14:10:53,020 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:10:53,021 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 14:10:53,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:10:53,022 INFO L85 PathProgramCache]: Analyzing trace with hash 693030023, now seen corresponding path program 2 times [2024-10-11 14:10:53,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:10:53,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843040674] [2024-10-11 14:10:53,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:10:53,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:10:53,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:10:53,165 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:10:53,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:10:53,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843040674] [2024-10-11 14:10:53,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843040674] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:10:53,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830886119] [2024-10-11 14:10:53,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:10:53,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:10:53,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:10:53,168 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 14:10:53,170 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 14:10:53,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:10:53,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:10:53,233 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 14:10:53,234 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:10:53,249 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:10:53,249 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:10:53,281 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 14:10:53,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830886119] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:10:53,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:10:53,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-10-11 14:10:53,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038758861] [2024-10-11 14:10:53,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:10:53,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 14:10:53,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:10:53,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 14:10:53,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-10-11 14:10:53,283 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 23 [2024-10-11 14:10:53,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 25 transitions, 90 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:10:53,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:10:53,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 23 [2024-10-11 14:10:53,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:10:53,342 INFO L124 PetriNetUnfolderBase]: 20/72 cut-off events. [2024-10-11 14:10:53,342 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-10-11 14:10:53,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 72 events. 20/72 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 136 event pairs, 16 based on Foata normal form. 2/68 useless extension candidates. Maximal degree in co-relation 118. Up to 51 conditions per place. [2024-10-11 14:10:53,343 INFO L140 encePairwiseOnDemand]: 20/23 looper letters, 14 selfloop transitions, 7 changer transitions 0/27 dead transitions. [2024-10-11 14:10:53,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 27 transitions, 144 flow [2024-10-11 14:10:53,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 14:10:53,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 14:10:53,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 71 transitions. [2024-10-11 14:10:53,345 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3858695652173913 [2024-10-11 14:10:53,345 INFO L175 Difference]: Start difference. First operand has 32 places, 25 transitions, 90 flow. Second operand 8 states and 71 transitions. [2024-10-11 14:10:53,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 27 transitions, 144 flow [2024-10-11 14:10:53,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 27 transitions, 130 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-11 14:10:53,346 INFO L231 Difference]: Finished difference. Result has 40 places, 27 transitions, 112 flow [2024-10-11 14:10:53,347 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=112, PETRI_PLACES=40, PETRI_TRANSITIONS=27} [2024-10-11 14:10:53,347 INFO L277 CegarLoopForPetriNet]: 23 programPoint places, 17 predicate places. [2024-10-11 14:10:53,347 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 27 transitions, 112 flow [2024-10-11 14:10:53,348 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:10:53,348 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:10:53,348 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 2, 1, 1, 1, 1, 1] [2024-10-11 14:10:53,363 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 14:10:53,548 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:10:53,549 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-11 14:10:53,550 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:10:53,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1739003591, now seen corresponding path program 3 times [2024-10-11 14:10:53,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:10:53,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866129136] [2024-10-11 14:10:53,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:10:53,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:10:53,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:10:53,577 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 14:10:53,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:10:53,613 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 14:10:53,614 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 14:10:53,614 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-10-11 14:10:53,616 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-10-11 14:10:53,616 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2024-10-11 14:10:53,616 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 14:10:53,616 INFO L407 BasicCegarLoop]: Path program histogram: [3, 1] [2024-10-11 14:10:53,618 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-11 14:10:53,620 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-11 14:10:53,635 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 14:10:53,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 39 transitions, 88 flow [2024-10-11 14:10:53,646 INFO L124 PetriNetUnfolderBase]: 5/44 cut-off events. [2024-10-11 14:10:53,648 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 14:10:53,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 44 events. 5/44 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 71 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 33. Up to 3 conditions per place. [2024-10-11 14:10:53,648 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 39 transitions, 88 flow [2024-10-11 14:10:53,649 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 39 transitions, 88 flow [2024-10-11 14:10:53,650 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:10:53,650 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;@3dca5089, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:10:53,650 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-10-11 14:10:53,654 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:10:53,654 INFO L124 PetriNetUnfolderBase]: 1/23 cut-off events. [2024-10-11 14:10:53,654 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 14:10:53,654 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:10:53,654 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2024-10-11 14:10:53,654 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-10-11 14:10:53,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:10:53,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1043353845, now seen corresponding path program 1 times [2024-10-11 14:10:53,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:10:53,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960928817] [2024-10-11 14:10:53,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:10:53,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:10:53,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:10:53,679 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 14:10:53,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:10:53,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960928817] [2024-10-11 14:10:53,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960928817] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:10:53,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:10:53,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 14:10:53,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458526589] [2024-10-11 14:10:53,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:10:53,681 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:10:53,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:10:53,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:10:53,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:10:53,683 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-10-11 14:10:53,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 39 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 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 14:10:53,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:10:53,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-10-11 14:10:53,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:10:53,837 INFO L124 PetriNetUnfolderBase]: 434/922 cut-off events. [2024-10-11 14:10:53,839 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-10-11 14:10:53,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1663 conditions, 922 events. 434/922 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4770 event pairs, 376 based on Foata normal form. 51/864 useless extension candidates. Maximal degree in co-relation 1014. Up to 708 conditions per place. [2024-10-11 14:10:53,848 INFO L140 encePairwiseOnDemand]: 33/39 looper letters, 24 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2024-10-11 14:10:53,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 37 transitions, 136 flow [2024-10-11 14:10:53,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:10:53,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:10:53,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 63 transitions. [2024-10-11 14:10:53,850 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2024-10-11 14:10:53,850 INFO L175 Difference]: Start difference. First operand has 39 places, 39 transitions, 88 flow. Second operand 3 states and 63 transitions. [2024-10-11 14:10:53,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 37 transitions, 136 flow [2024-10-11 14:10:53,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 37 transitions, 136 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 14:10:53,853 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 94 flow [2024-10-11 14:10:53,853 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2024-10-11 14:10:53,854 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 2 predicate places. [2024-10-11 14:10:53,854 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 94 flow [2024-10-11 14:10:53,855 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 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 14:10:53,855 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:10:53,855 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2024-10-11 14:10:53,855 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-11 14:10:53,856 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-10-11 14:10:53,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:10:53,856 INFO L85 PathProgramCache]: Analyzing trace with hash 2137667530, now seen corresponding path program 1 times [2024-10-11 14:10:53,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:10:53,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893993138] [2024-10-11 14:10:53,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:10:53,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:10:53,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:10:53,899 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 14:10:53,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:10:53,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893993138] [2024-10-11 14:10:53,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893993138] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:10:53,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503136954] [2024-10-11 14:10:53,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:10:53,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:10:53,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:10:53,902 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 14:10:53,903 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 14:10:53,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:10:53,957 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-11 14:10:53,957 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:10:53,964 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 14:10:53,964 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:10:53,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 14:10:53,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503136954] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:10:53,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:10:53,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-11 14:10:53,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835213233] [2024-10-11 14:10:53,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:10:53,976 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:10:53,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:10:53,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:10:53,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-11 14:10:53,977 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-10-11 14:10:53,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 94 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 14:10:53,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:10:53,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-10-11 14:10:53,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:10:54,074 INFO L124 PetriNetUnfolderBase]: 434/925 cut-off events. [2024-10-11 14:10:54,075 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-10-11 14:10:54,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1679 conditions, 925 events. 434/925 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4770 event pairs, 376 based on Foata normal form. 0/816 useless extension candidates. Maximal degree in co-relation 1666. Up to 708 conditions per place. [2024-10-11 14:10:54,079 INFO L140 encePairwiseOnDemand]: 36/39 looper letters, 24 selfloop transitions, 5 changer transitions 0/40 dead transitions. [2024-10-11 14:10:54,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 40 transitions, 164 flow [2024-10-11 14:10:54,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:10:54,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:10:54,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-10-11 14:10:54,080 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4188034188034188 [2024-10-11 14:10:54,080 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 94 flow. Second operand 6 states and 98 transitions. [2024-10-11 14:10:54,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 40 transitions, 164 flow [2024-10-11 14:10:54,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 40 transitions, 160 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-11 14:10:54,085 INFO L231 Difference]: Finished difference. Result has 48 places, 40 transitions, 126 flow [2024-10-11 14:10:54,085 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=126, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2024-10-11 14:10:54,086 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 9 predicate places. [2024-10-11 14:10:54,086 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 126 flow [2024-10-11 14:10:54,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 14:10:54,086 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:10:54,086 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1] [2024-10-11 14:10:54,098 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 14:10:54,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:10:54,287 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-10-11 14:10:54,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:10:54,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1327636939, now seen corresponding path program 2 times [2024-10-11 14:10:54,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:10:54,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94940582] [2024-10-11 14:10:54,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:10:54,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:10:54,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:10:54,363 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 14:10:54,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:10:54,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94940582] [2024-10-11 14:10:54,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94940582] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:10:54,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047243186] [2024-10-11 14:10:54,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:10:54,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:10:54,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:10:54,365 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 14:10:54,367 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 14:10:54,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:10:54,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:10:54,434 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 14:10:54,434 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:10:54,451 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 14:10:54,451 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:10:54,487 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-11 14:10:54,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047243186] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:10:54,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:10:54,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-10-11 14:10:54,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311612857] [2024-10-11 14:10:54,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:10:54,488 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 14:10:54,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:10:54,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 14:10:54,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-10-11 14:10:54,489 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 39 [2024-10-11 14:10:54,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 126 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:10:54,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:10:54,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 39 [2024-10-11 14:10:54,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:10:54,604 INFO L124 PetriNetUnfolderBase]: 434/927 cut-off events. [2024-10-11 14:10:54,604 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-10-11 14:10:54,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1700 conditions, 927 events. 434/927 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4768 event pairs, 376 based on Foata normal form. 2/821 useless extension candidates. Maximal degree in co-relation 1657. Up to 708 conditions per place. [2024-10-11 14:10:54,609 INFO L140 encePairwiseOnDemand]: 36/39 looper letters, 24 selfloop transitions, 7 changer transitions 0/42 dead transitions. [2024-10-11 14:10:54,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 42 transitions, 200 flow [2024-10-11 14:10:54,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 14:10:54,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 14:10:54,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-10-11 14:10:54,611 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38782051282051283 [2024-10-11 14:10:54,611 INFO L175 Difference]: Start difference. First operand has 48 places, 40 transitions, 126 flow. Second operand 8 states and 121 transitions. [2024-10-11 14:10:54,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 42 transitions, 200 flow [2024-10-11 14:10:54,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 42 transitions, 186 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-11 14:10:54,612 INFO L231 Difference]: Finished difference. Result has 56 places, 42 transitions, 148 flow [2024-10-11 14:10:54,612 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=39, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=148, PETRI_PLACES=56, PETRI_TRANSITIONS=42} [2024-10-11 14:10:54,613 INFO L277 CegarLoopForPetriNet]: 39 programPoint places, 17 predicate places. [2024-10-11 14:10:54,613 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 42 transitions, 148 flow [2024-10-11 14:10:54,613 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:10:54,613 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:10:54,613 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1] [2024-10-11 14:10:54,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-11 14:10:54,815 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,SelfDestructingSolverStorable6 [2024-10-11 14:10:54,816 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-10-11 14:10:54,816 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:10:54,816 INFO L85 PathProgramCache]: Analyzing trace with hash -487823147, now seen corresponding path program 3 times [2024-10-11 14:10:54,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:10:54,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135675967] [2024-10-11 14:10:54,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:10:54,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:10:54,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:10:54,842 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 14:10:54,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:10:54,859 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 14:10:54,860 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 14:10:54,860 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-10-11 14:10:54,860 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-10-11 14:10:54,861 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-10-11 14:10:54,861 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-10-11 14:10:54,861 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-11 14:10:54,861 INFO L407 BasicCegarLoop]: Path program histogram: [3, 1] [2024-10-11 14:10:54,862 WARN L239 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-11 14:10:54,862 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-11 14:10:54,888 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 14:10:54,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 55 transitions, 128 flow [2024-10-11 14:10:54,895 INFO L124 PetriNetUnfolderBase]: 7/63 cut-off events. [2024-10-11 14:10:54,895 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-10-11 14:10:54,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 63 events. 7/63 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 143 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 49. Up to 4 conditions per place. [2024-10-11 14:10:54,896 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 55 transitions, 128 flow [2024-10-11 14:10:54,897 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 55 transitions, 128 flow [2024-10-11 14:10:54,897 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:10:54,900 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;@3dca5089, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:10:54,900 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-10-11 14:10:54,903 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:10:54,904 INFO L124 PetriNetUnfolderBase]: 1/36 cut-off events. [2024-10-11 14:10:54,904 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-10-11 14:10:54,904 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:10:54,904 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1] [2024-10-11 14:10:54,905 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-10-11 14:10:54,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:10:54,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1422539676, now seen corresponding path program 1 times [2024-10-11 14:10:54,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:10:54,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377750797] [2024-10-11 14:10:54,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:10:54,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:10:54,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:10:54,933 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-11 14:10:54,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:10:54,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377750797] [2024-10-11 14:10:54,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377750797] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:10:54,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:10:54,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 14:10:54,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309540457] [2024-10-11 14:10:54,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:10:54,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:10:54,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:10:54,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:10:54,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:10:54,935 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 55 [2024-10-11 14:10:54,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 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 14:10:54,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:10:54,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 55 [2024-10-11 14:10:54,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:10:55,688 INFO L124 PetriNetUnfolderBase]: 6347/10809 cut-off events. [2024-10-11 14:10:55,688 INFO L125 PetriNetUnfolderBase]: For 607/607 co-relation queries the response was YES. [2024-10-11 14:10:55,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19975 conditions, 10809 events. 6347/10809 cut-off events. For 607/607 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 74953 event pairs, 5560 based on Foata normal form. 713/10235 useless extension candidates. Maximal degree in co-relation 1663. Up to 8808 conditions per place. [2024-10-11 14:10:55,734 INFO L140 encePairwiseOnDemand]: 48/55 looper letters, 34 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2024-10-11 14:10:55,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 52 transitions, 194 flow [2024-10-11 14:10:55,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:10:55,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:10:55,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2024-10-11 14:10:55,735 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5393939393939394 [2024-10-11 14:10:55,735 INFO L175 Difference]: Start difference. First operand has 55 places, 55 transitions, 128 flow. Second operand 3 states and 89 transitions. [2024-10-11 14:10:55,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 52 transitions, 194 flow [2024-10-11 14:10:55,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 52 transitions, 192 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-10-11 14:10:55,737 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 130 flow [2024-10-11 14:10:55,737 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-10-11 14:10:55,738 INFO L277 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2024-10-11 14:10:55,738 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 130 flow [2024-10-11 14:10:55,738 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 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 14:10:55,740 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:10:55,740 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:10:55,740 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-11 14:10:55,740 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-10-11 14:10:55,741 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:10:55,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1561247080, now seen corresponding path program 1 times [2024-10-11 14:10:55,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:10:55,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137609670] [2024-10-11 14:10:55,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:10:55,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:10:55,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:10:55,768 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-11 14:10:55,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:10:55,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137609670] [2024-10-11 14:10:55,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137609670] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:10:55,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809220914] [2024-10-11 14:10:55,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:10:55,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:10:55,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:10:55,770 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 14:10:55,771 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 14:10:55,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:10:55,834 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-11 14:10:55,835 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:10:55,847 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-11 14:10:55,849 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:10:55,863 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-11 14:10:55,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809220914] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:10:55,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:10:55,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-11 14:10:55,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573620350] [2024-10-11 14:10:55,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:10:55,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:10:55,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:10:55,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:10:55,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-11 14:10:55,865 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 55 [2024-10-11 14:10:55,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 130 flow. Second operand has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 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 14:10:55,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:10:55,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 55 [2024-10-11 14:10:55,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:10:56,651 INFO L124 PetriNetUnfolderBase]: 6347/10812 cut-off events. [2024-10-11 14:10:56,651 INFO L125 PetriNetUnfolderBase]: For 368/368 co-relation queries the response was YES. [2024-10-11 14:10:56,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19910 conditions, 10812 events. 6347/10812 cut-off events. For 368/368 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 74912 event pairs, 5560 based on Foata normal form. 0/9525 useless extension candidates. Maximal degree in co-relation 19896. Up to 8808 conditions per place. [2024-10-11 14:10:56,693 INFO L140 encePairwiseOnDemand]: 52/55 looper letters, 34 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2024-10-11 14:10:56,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 55 transitions, 220 flow [2024-10-11 14:10:56,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:10:56,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:10:56,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-10-11 14:10:56,695 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41818181818181815 [2024-10-11 14:10:56,695 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 130 flow. Second operand 6 states and 138 transitions. [2024-10-11 14:10:56,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 55 transitions, 220 flow [2024-10-11 14:10:56,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 55 transitions, 216 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-11 14:10:56,697 INFO L231 Difference]: Finished difference. Result has 64 places, 55 transitions, 162 flow [2024-10-11 14:10:56,697 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=162, PETRI_PLACES=64, PETRI_TRANSITIONS=55} [2024-10-11 14:10:56,697 INFO L277 CegarLoopForPetriNet]: 55 programPoint places, 9 predicate places. [2024-10-11 14:10:56,697 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 55 transitions, 162 flow [2024-10-11 14:10:56,698 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 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 14:10:56,698 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:10:56,698 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1] [2024-10-11 14:10:56,717 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 14:10:56,901 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 14:10:56,902 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-10-11 14:10:56,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:10:56,902 INFO L85 PathProgramCache]: Analyzing trace with hash 2101195108, now seen corresponding path program 2 times [2024-10-11 14:10:56,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:10:56,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472031426] [2024-10-11 14:10:56,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:10:56,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:10:56,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:10:56,967 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-11 14:10:56,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:10:56,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472031426] [2024-10-11 14:10:56,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472031426] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:10:56,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463137124] [2024-10-11 14:10:56,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:10:56,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:10:56,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:10:56,969 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 14:10:56,970 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 14:10:57,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 14:10:57,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:10:57,035 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 14:10:57,035 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:10:57,046 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-11 14:10:57,047 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:10:57,073 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-11 14:10:57,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463137124] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:10:57,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:10:57,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-10-11 14:10:57,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863230850] [2024-10-11 14:10:57,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:10:57,074 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 14:10:57,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:10:57,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 14:10:57,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-10-11 14:10:57,075 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 55 [2024-10-11 14:10:57,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 55 transitions, 162 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:10:57,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:10:57,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 55 [2024-10-11 14:10:57,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:10:57,906 INFO L124 PetriNetUnfolderBase]: 6347/10814 cut-off events. [2024-10-11 14:10:57,906 INFO L125 PetriNetUnfolderBase]: For 376/376 co-relation queries the response was YES. [2024-10-11 14:10:57,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19931 conditions, 10814 events. 6347/10814 cut-off events. For 376/376 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 74893 event pairs, 5560 based on Foata normal form. 2/9530 useless extension candidates. Maximal degree in co-relation 19887. Up to 8808 conditions per place. [2024-10-11 14:10:57,942 INFO L140 encePairwiseOnDemand]: 52/55 looper letters, 34 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2024-10-11 14:10:57,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 57 transitions, 256 flow [2024-10-11 14:10:57,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 14:10:57,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 14:10:57,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-10-11 14:10:57,944 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3886363636363636 [2024-10-11 14:10:57,944 INFO L175 Difference]: Start difference. First operand has 64 places, 55 transitions, 162 flow. Second operand 8 states and 171 transitions. [2024-10-11 14:10:57,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 57 transitions, 256 flow [2024-10-11 14:10:57,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 57 transitions, 242 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-11 14:10:57,947 INFO L231 Difference]: Finished difference. Result has 72 places, 57 transitions, 184 flow [2024-10-11 14:10:57,947 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=184, PETRI_PLACES=72, PETRI_TRANSITIONS=57} [2024-10-11 14:10:57,948 INFO L277 CegarLoopForPetriNet]: 55 programPoint places, 17 predicate places. [2024-10-11 14:10:57,948 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 57 transitions, 184 flow [2024-10-11 14:10:57,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:10:57,948 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:10:57,948 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 4, 3, 1, 1, 1, 1, 1, 1] [2024-10-11 14:10:57,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-11 14:10:58,148 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 14:10:58,149 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-10-11 14:10:58,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:10:58,149 INFO L85 PathProgramCache]: Analyzing trace with hash 308688868, now seen corresponding path program 3 times [2024-10-11 14:10:58,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:10:58,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143519933] [2024-10-11 14:10:58,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:10:58,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:10:58,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:10:58,161 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 14:10:58,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 14:10:58,172 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 14:10:58,174 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 14:10:58,174 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-10-11 14:10:58,174 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-10-11 14:10:58,175 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-10-11 14:10:58,175 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-10-11 14:10:58,175 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-10-11 14:10:58,175 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-11 14:10:58,175 INFO L407 BasicCegarLoop]: Path program histogram: [3, 1] [2024-10-11 14:10:58,175 WARN L239 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-11 14:10:58,176 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-10-11 14:10:58,197 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 14:10:58,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 71 transitions, 170 flow [2024-10-11 14:10:58,206 INFO L124 PetriNetUnfolderBase]: 9/82 cut-off events. [2024-10-11 14:10:58,207 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-10-11 14:10:58,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 82 events. 9/82 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 211 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 73. Up to 5 conditions per place. [2024-10-11 14:10:58,207 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 71 transitions, 170 flow [2024-10-11 14:10:58,207 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 71 transitions, 170 flow [2024-10-11 14:10:58,208 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 14:10:58,208 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;@3dca5089, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 14:10:58,208 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-10-11 14:10:58,212 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 14:10:58,212 INFO L124 PetriNetUnfolderBase]: 2/45 cut-off events. [2024-10-11 14:10:58,212 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-10-11 14:10:58,212 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:10:58,212 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:10:58,212 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-10-11 14:10:58,213 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:10:58,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1001218811, now seen corresponding path program 1 times [2024-10-11 14:10:58,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:10:58,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816391069] [2024-10-11 14:10:58,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:10:58,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:10:58,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:10:58,233 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 14:10:58,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:10:58,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816391069] [2024-10-11 14:10:58,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816391069] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:10:58,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 14:10:58,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 14:10:58,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930131193] [2024-10-11 14:10:58,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:10:58,234 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:10:58,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:10:58,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:10:58,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 14:10:58,235 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 71 [2024-10-11 14:10:58,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:10:58,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:10:58,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 71 [2024-10-11 14:10:58,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:11:05,185 INFO L124 PetriNetUnfolderBase]: 79247/119475 cut-off events. [2024-10-11 14:11:05,186 INFO L125 PetriNetUnfolderBase]: For 9589/9589 co-relation queries the response was YES. [2024-10-11 14:11:05,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224870 conditions, 119475 events. 79247/119475 cut-off events. For 9589/9589 co-relation queries the response was YES. Maximal size of possible extension queue 3779. Compared 957964 event pairs, 69712 based on Foata normal form. 8858/114257 useless extension candidates. Maximal degree in co-relation 20055. Up to 101391 conditions per place. [2024-10-11 14:11:05,807 INFO L140 encePairwiseOnDemand]: 63/71 looper letters, 44 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2024-10-11 14:11:05,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 67 transitions, 254 flow [2024-10-11 14:11:05,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:11:05,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:11:05,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 115 transitions. [2024-10-11 14:11:05,808 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.539906103286385 [2024-10-11 14:11:05,808 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 170 flow. Second operand 3 states and 115 transitions. [2024-10-11 14:11:05,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 67 transitions, 254 flow [2024-10-11 14:11:05,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 67 transitions, 248 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-10-11 14:11:05,818 INFO L231 Difference]: Finished difference. Result has 73 places, 67 transitions, 166 flow [2024-10-11 14:11:05,818 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=73, PETRI_TRANSITIONS=67} [2024-10-11 14:11:05,819 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 2 predicate places. [2024-10-11 14:11:05,820 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 67 transitions, 166 flow [2024-10-11 14:11:05,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:11:05,821 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:11:05,821 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:11:05,821 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-11 14:11:05,821 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-10-11 14:11:05,821 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:11:05,821 INFO L85 PathProgramCache]: Analyzing trace with hash 658252622, now seen corresponding path program 1 times [2024-10-11 14:11:05,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:11:05,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426744064] [2024-10-11 14:11:05,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:05,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:11:05,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:11:05,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:11:05,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:11:05,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426744064] [2024-10-11 14:11:05,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426744064] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:11:05,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014960794] [2024-10-11 14:11:05,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:05,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:11:05,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:11:05,856 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 14:11:05,857 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 14:11:05,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:11:05,923 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-11 14:11:05,923 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:11:05,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:11:05,930 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:11:05,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:11:05,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014960794] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:11:05,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:11:05,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-11 14:11:05,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768121789] [2024-10-11 14:11:05,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:11:05,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 14:11:05,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:11:05,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 14:11:05,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-11 14:11:05,940 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 71 [2024-10-11 14:11:05,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 67 transitions, 166 flow. Second operand has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:11:05,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:11:05,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 71 [2024-10-11 14:11:05,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:11:13,178 INFO L124 PetriNetUnfolderBase]: 79247/119478 cut-off events. [2024-10-11 14:11:13,178 INFO L125 PetriNetUnfolderBase]: For 4319/4319 co-relation queries the response was YES. [2024-10-11 14:11:13,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223347 conditions, 119478 events. 79247/119478 cut-off events. For 4319/4319 co-relation queries the response was YES. Maximal size of possible extension queue 3779. Compared 957923 event pairs, 69712 based on Foata normal form. 0/105402 useless extension candidates. Maximal degree in co-relation 223332. Up to 101391 conditions per place. [2024-10-11 14:11:14,086 INFO L140 encePairwiseOnDemand]: 68/71 looper letters, 44 selfloop transitions, 5 changer transitions 0/70 dead transitions. [2024-10-11 14:11:14,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 70 transitions, 276 flow [2024-10-11 14:11:14,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 14:11:14,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 14:11:14,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-10-11 14:11:14,088 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41784037558685444 [2024-10-11 14:11:14,088 INFO L175 Difference]: Start difference. First operand has 73 places, 67 transitions, 166 flow. Second operand 6 states and 178 transitions. [2024-10-11 14:11:14,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 70 transitions, 276 flow [2024-10-11 14:11:14,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 70 transitions, 272 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-11 14:11:14,107 INFO L231 Difference]: Finished difference. Result has 80 places, 70 transitions, 198 flow [2024-10-11 14:11:14,107 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=198, PETRI_PLACES=80, PETRI_TRANSITIONS=70} [2024-10-11 14:11:14,108 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 9 predicate places. [2024-10-11 14:11:14,108 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 70 transitions, 198 flow [2024-10-11 14:11:14,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.285714285714285) internal successors, (163), 7 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:11:14,108 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:11:14,108 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:11:14,123 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 14:11:14,312 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:11:14,313 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-10-11 14:11:14,313 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:11:14,314 INFO L85 PathProgramCache]: Analyzing trace with hash 159670203, now seen corresponding path program 2 times [2024-10-11 14:11:14,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:11:14,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305768782] [2024-10-11 14:11:14,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:14,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:11:14,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:11:14,392 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 14:11:14,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:11:14,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305768782] [2024-10-11 14:11:14,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305768782] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:11:14,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394447342] [2024-10-11 14:11:14,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 14:11:14,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:11:14,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:11:14,394 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 14:11:14,396 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 14:11:14,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-11 14:11:14,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 14:11:14,469 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-11 14:11:14,470 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:11:14,483 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-11 14:11:14,484 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 14:11:14,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394447342] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 14:11:14,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 14:11:14,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2024-10-11 14:11:14,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260891597] [2024-10-11 14:11:14,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 14:11:14,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 14:11:14,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:11:14,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 14:11:14,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-10-11 14:11:14,495 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 71 [2024-10-11 14:11:14,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 70 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:11:14,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:11:14,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 71 [2024-10-11 14:11:14,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 14:11:23,011 INFO L124 PetriNetUnfolderBase]: 99317/141309 cut-off events. [2024-10-11 14:11:23,011 INFO L125 PetriNetUnfolderBase]: For 4035/4035 co-relation queries the response was YES. [2024-10-11 14:11:23,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270727 conditions, 141309 events. 99317/141309 cut-off events. For 4035/4035 co-relation queries the response was YES. Maximal size of possible extension queue 3804. Compared 1042822 event pairs, 37636 based on Foata normal form. 0/124816 useless extension candidates. Maximal degree in co-relation 270690. Up to 67590 conditions per place. [2024-10-11 14:11:23,949 INFO L140 encePairwiseOnDemand]: 67/71 looper letters, 81 selfloop transitions, 3 changer transitions 0/102 dead transitions. [2024-10-11 14:11:23,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 102 transitions, 445 flow [2024-10-11 14:11:23,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 14:11:23,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 14:11:23,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 138 transitions. [2024-10-11 14:11:23,950 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.647887323943662 [2024-10-11 14:11:23,950 INFO L175 Difference]: Start difference. First operand has 80 places, 70 transitions, 198 flow. Second operand 3 states and 138 transitions. [2024-10-11 14:11:23,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 102 transitions, 445 flow [2024-10-11 14:11:23,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 102 transitions, 431 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-11 14:11:23,958 INFO L231 Difference]: Finished difference. Result has 80 places, 70 transitions, 197 flow [2024-10-11 14:11:23,959 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=71, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=197, PETRI_PLACES=80, PETRI_TRANSITIONS=70} [2024-10-11 14:11:23,959 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 9 predicate places. [2024-10-11 14:11:23,959 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 70 transitions, 197 flow [2024-10-11 14:11:23,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 14:11:23,960 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 14:11:23,960 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 14:11:23,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-11 14:11:24,160 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,SelfDestructingSolverStorable14 [2024-10-11 14:11:24,161 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-10-11 14:11:24,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 14:11:24,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1992933710, now seen corresponding path program 1 times [2024-10-11 14:11:24,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 14:11:24,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838427954] [2024-10-11 14:11:24,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:24,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 14:11:24,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:11:24,216 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-10-11 14:11:24,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 14:11:24,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838427954] [2024-10-11 14:11:24,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838427954] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 14:11:24,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995404894] [2024-10-11 14:11:24,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 14:11:24,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 14:11:24,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 14:11:24,219 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 14:11:24,220 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 14:11:24,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 14:11:24,297 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 14:11:24,298 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 14:11:24,308 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-10-11 14:11:24,308 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 14:11:24,333 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-10-11 14:11:24,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995404894] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 14:11:24,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 14:11:24,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-10-11 14:11:24,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264767047] [2024-10-11 14:11:24,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 14:11:24,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 14:11:24,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 14:11:24,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 14:11:24,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-10-11 14:11:24,334 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 71 [2024-10-11 14:11:24,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 70 transitions, 197 flow. Second operand has 9 states, 9 states have (on average 22.88888888888889) internal successors, (206), 9 states have internal predecessors, (206), 0 states have call successors, (0), 0 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 14:11:24,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 14:11:24,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 71 [2024-10-11 14:11:24,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand