./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/11_fmaxsymopt-pthread.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/11_fmaxsymopt-pthread.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 991dbc557cd31e595edd52677120ba8d8af2b607a4ab228e6500c72ebba22de0 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 06:50:30,504 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 06:50:30,558 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-13 06:50:30,564 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 06:50:30,564 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 06:50:30,581 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 06:50:30,582 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 06:50:30,582 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 06:50:30,583 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 06:50:30,583 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 06:50:30,583 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 06:50:30,584 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 06:50:30,584 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 06:50:30,584 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 06:50:30,585 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 06:50:30,585 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 06:50:30,585 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-13 06:50:30,585 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 06:50:30,586 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 06:50:30,586 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 06:50:30,586 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 06:50:30,589 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-13 06:50:30,590 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 06:50:30,590 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-13 06:50:30,590 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 06:50:30,590 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 06:50:30,592 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-13 06:50:30,592 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 06:50:30,593 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 06:50:30,593 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 06:50:30,593 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 06:50:30,593 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 06:50:30,593 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 06:50:30,596 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 06:50:30,597 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 06:50:30,597 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-13 06:50:30,597 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 06:50:30,597 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 06:50:30,597 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 06:50:30,598 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 06:50:30,598 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 06:50:30,598 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 06:50:30,598 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 991dbc557cd31e595edd52677120ba8d8af2b607a4ab228e6500c72ebba22de0 [2024-10-13 06:50:30,785 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 06:50:30,804 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 06:50:30,807 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 06:50:30,808 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 06:50:30,808 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 06:50:30,809 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/11_fmaxsymopt-pthread.i [2024-10-13 06:50:32,018 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 06:50:32,195 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 06:50:32,196 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/11_fmaxsymopt-pthread.i [2024-10-13 06:50:32,205 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2f3b7b3c/a40694242f7e4862af32270bb7dbba66/FLAGee96a6ff1 [2024-10-13 06:50:32,215 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2f3b7b3c/a40694242f7e4862af32270bb7dbba66 [2024-10-13 06:50:32,217 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 06:50:32,218 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 06:50:32,219 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 06:50:32,219 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 06:50:32,223 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 06:50:32,224 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:50:32" (1/1) ... [2024-10-13 06:50:32,224 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41b75e22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:50:32, skipping insertion in model container [2024-10-13 06:50:32,224 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:50:32" (1/1) ... [2024-10-13 06:50:32,264 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 06:50:32,533 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/11_fmaxsymopt-pthread.i[30871,30884] [2024-10-13 06:50:32,543 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 06:50:32,556 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 06:50:32,602 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/11_fmaxsymopt-pthread.i[30871,30884] [2024-10-13 06:50:32,607 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 06:50:32,641 INFO L204 MainTranslator]: Completed translation [2024-10-13 06:50:32,642 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:50:32 WrapperNode [2024-10-13 06:50:32,642 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 06:50:32,643 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 06:50:32,643 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 06:50:32,644 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 06:50:32,649 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:50:32" (1/1) ... [2024-10-13 06:50:32,660 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:50:32" (1/1) ... [2024-10-13 06:50:32,678 INFO L138 Inliner]: procedures = 164, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 96 [2024-10-13 06:50:32,678 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 06:50:32,679 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 06:50:32,680 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 06:50:32,680 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 06:50:32,688 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:50:32" (1/1) ... [2024-10-13 06:50:32,689 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:50:32" (1/1) ... [2024-10-13 06:50:32,695 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:50:32" (1/1) ... [2024-10-13 06:50:32,707 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]. [2024-10-13 06:50:32,707 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:50:32" (1/1) ... [2024-10-13 06:50:32,707 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:50:32" (1/1) ... [2024-10-13 06:50:32,711 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:50:32" (1/1) ... [2024-10-13 06:50:32,713 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:50:32" (1/1) ... [2024-10-13 06:50:32,714 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:50:32" (1/1) ... [2024-10-13 06:50:32,715 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:50:32" (1/1) ... [2024-10-13 06:50:32,717 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 06:50:32,717 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 06:50:32,717 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 06:50:32,717 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 06:50:32,718 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:50:32" (1/1) ... [2024-10-13 06:50:32,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 06:50:32,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 06:50:32,746 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-13 06:50:32,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-13 06:50:32,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 06:50:32,786 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 06:50:32,786 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-13 06:50:32,786 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-10-13 06:50:32,787 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-10-13 06:50:32,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 06:50:32,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 06:50:32,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-13 06:50:32,788 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-13 06:50:32,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 06:50:32,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 06:50:32,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 06:50:32,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-13 06:50:32,789 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-13 06:50:32,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 06:50:32,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 06:50:32,790 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-13 06:50:32,921 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 06:50:32,923 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 06:50:33,093 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-13 06:50:33,097 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 06:50:33,216 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 06:50:33,217 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-13 06:50:33,217 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:50:33 BoogieIcfgContainer [2024-10-13 06:50:33,217 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 06:50:33,219 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 06:50:33,219 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 06:50:33,224 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 06:50:33,224 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:50:32" (1/3) ... [2024-10-13 06:50:33,225 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6037dfc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:50:33, skipping insertion in model container [2024-10-13 06:50:33,225 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:50:32" (2/3) ... [2024-10-13 06:50:33,226 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6037dfc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:50:33, skipping insertion in model container [2024-10-13 06:50:33,226 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:50:33" (3/3) ... [2024-10-13 06:50:33,226 INFO L112 eAbstractionObserver]: Analyzing ICFG 11_fmaxsymopt-pthread.i [2024-10-13 06:50:33,242 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 06:50:33,242 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-13 06:50:33,242 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-13 06:50:33,273 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-13 06:50:33,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 25 transitions, 54 flow [2024-10-13 06:50:33,325 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2024-10-13 06:50:33,325 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 06:50:33,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31 conditions, 27 events. 4/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 35 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2024-10-13 06:50:33,327 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 25 transitions, 54 flow [2024-10-13 06:50:33,329 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 25 transitions, 54 flow [2024-10-13 06:50:33,335 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 06:50:33,340 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;@5e886adb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 06:50:33,340 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-13 06:50:33,345 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 06:50:33,345 INFO L124 PetriNetUnfolderBase]: 2/13 cut-off events. [2024-10-13 06:50:33,345 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 06:50:33,345 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:50:33,345 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-10-13 06:50:33,346 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 06:50:33,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:50:33,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1213145637, now seen corresponding path program 1 times [2024-10-13 06:50:33,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:50:33,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943446066] [2024-10-13 06:50:33,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:50:33,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:50:33,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:50:33,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 06:50:33,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 06:50:33,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943446066] [2024-10-13 06:50:33,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943446066] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 06:50:33,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 06:50:33,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 06:50:33,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159358754] [2024-10-13 06:50:33,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 06:50:33,575 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 06:50:33,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 06:50:33,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 06:50:33,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 06:50:33,629 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 25 [2024-10-13 06:50:33,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 25 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 06:50:33,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 06:50:33,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 25 [2024-10-13 06:50:33,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 06:50:33,697 INFO L124 PetriNetUnfolderBase]: 25/76 cut-off events. [2024-10-13 06:50:33,697 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 06:50:33,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 76 events. 25/76 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 164 event pairs, 18 based on Foata normal form. 3/72 useless extension candidates. Maximal degree in co-relation 118. Up to 56 conditions per place. [2024-10-13 06:50:33,699 INFO L140 encePairwiseOnDemand]: 20/25 looper letters, 15 selfloop transitions, 2 changer transitions 0/24 dead transitions. [2024-10-13 06:50:33,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 24 transitions, 86 flow [2024-10-13 06:50:33,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 06:50:33,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 06:50:33,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 41 transitions. [2024-10-13 06:50:33,709 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5466666666666666 [2024-10-13 06:50:33,710 INFO L175 Difference]: Start difference. First operand has 24 places, 25 transitions, 54 flow. Second operand 3 states and 41 transitions. [2024-10-13 06:50:33,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 24 transitions, 86 flow [2024-10-13 06:50:33,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 24 transitions, 86 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 06:50:33,717 INFO L231 Difference]: Finished difference. Result has 26 places, 24 transitions, 62 flow [2024-10-13 06:50:33,718 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=26, PETRI_TRANSITIONS=24} [2024-10-13 06:50:33,721 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 2 predicate places. [2024-10-13 06:50:33,721 INFO L471 AbstractCegarLoop]: Abstraction has has 26 places, 24 transitions, 62 flow [2024-10-13 06:50:33,721 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 06:50:33,721 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:50:33,721 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-10-13 06:50:33,721 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 06:50:33,722 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 06:50:33,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:50:33,722 INFO L85 PathProgramCache]: Analyzing trace with hash 2135016630, now seen corresponding path program 1 times [2024-10-13 06:50:33,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:50:33,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188767911] [2024-10-13 06:50:33,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:50:33,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:50:33,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:50:33,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 06:50:33,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 06:50:33,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188767911] [2024-10-13 06:50:33,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188767911] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 06:50:33,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573451219] [2024-10-13 06:50:33,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:50:33,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 06:50:33,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 06:50:33,837 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 06:50:33,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 06:50:33,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:50:33,913 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-13 06:50:33,917 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 06:50:33,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 06:50:33,949 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 06:50:33,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 06:50:33,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573451219] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 06:50:33,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 06:50:33,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-13 06:50:33,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617189714] [2024-10-13 06:50:33,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 06:50:33,971 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-13 06:50:33,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 06:50:33,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-13 06:50:33,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-13 06:50:33,972 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 25 [2024-10-13 06:50:33,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 24 transitions, 62 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 06:50:33,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 06:50:33,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 25 [2024-10-13 06:50:33,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 06:50:34,046 INFO L124 PetriNetUnfolderBase]: 25/79 cut-off events. [2024-10-13 06:50:34,046 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 06:50:34,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153 conditions, 79 events. 25/79 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 164 event pairs, 18 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 141. Up to 56 conditions per place. [2024-10-13 06:50:34,047 INFO L140 encePairwiseOnDemand]: 22/25 looper letters, 15 selfloop transitions, 5 changer transitions 0/27 dead transitions. [2024-10-13 06:50:34,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 27 transitions, 114 flow [2024-10-13 06:50:34,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 06:50:34,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 06:50:34,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 65 transitions. [2024-10-13 06:50:34,048 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-10-13 06:50:34,049 INFO L175 Difference]: Start difference. First operand has 26 places, 24 transitions, 62 flow. Second operand 6 states and 65 transitions. [2024-10-13 06:50:34,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 27 transitions, 114 flow [2024-10-13 06:50:34,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 27 transitions, 110 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-13 06:50:34,050 INFO L231 Difference]: Finished difference. Result has 33 places, 27 transitions, 94 flow [2024-10-13 06:50:34,050 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=94, PETRI_PLACES=33, PETRI_TRANSITIONS=27} [2024-10-13 06:50:34,050 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 9 predicate places. [2024-10-13 06:50:34,050 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 27 transitions, 94 flow [2024-10-13 06:50:34,051 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 06:50:34,051 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:50:34,051 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2024-10-13 06:50:34,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-13 06:50:34,251 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 06:50:34,252 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 06:50:34,252 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:50:34,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1054097819, now seen corresponding path program 2 times [2024-10-13 06:50:34,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:50:34,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086096362] [2024-10-13 06:50:34,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:50:34,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:50:34,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:50:34,363 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 06:50:34,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 06:50:34,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086096362] [2024-10-13 06:50:34,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086096362] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 06:50:34,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357200741] [2024-10-13 06:50:34,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 06:50:34,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 06:50:34,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 06:50:34,366 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 06:50:34,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-13 06:50:34,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-13 06:50:34,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 06:50:34,427 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-13 06:50:34,428 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 06:50:34,450 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 06:50:34,450 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 06:50:34,486 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-13 06:50:34,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357200741] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 06:50:34,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 06:50:34,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-10-13 06:50:34,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649870445] [2024-10-13 06:50:34,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 06:50:34,487 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-13 06:50:34,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 06:50:34,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-13 06:50:34,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-10-13 06:50:34,488 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 25 [2024-10-13 06:50:34,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 27 transitions, 94 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 06:50:34,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 06:50:34,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 25 [2024-10-13 06:50:34,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 06:50:34,541 INFO L124 PetriNetUnfolderBase]: 25/81 cut-off events. [2024-10-13 06:50:34,542 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-10-13 06:50:34,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 81 events. 25/81 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 164 event pairs, 18 based on Foata normal form. 2/77 useless extension candidates. Maximal degree in co-relation 132. Up to 56 conditions per place. [2024-10-13 06:50:34,543 INFO L140 encePairwiseOnDemand]: 22/25 looper letters, 15 selfloop transitions, 7 changer transitions 0/29 dead transitions. [2024-10-13 06:50:34,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 29 transitions, 150 flow [2024-10-13 06:50:34,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 06:50:34,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-13 06:50:34,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 80 transitions. [2024-10-13 06:50:34,546 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-10-13 06:50:34,546 INFO L175 Difference]: Start difference. First operand has 33 places, 27 transitions, 94 flow. Second operand 8 states and 80 transitions. [2024-10-13 06:50:34,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 29 transitions, 150 flow [2024-10-13 06:50:34,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 29 transitions, 136 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-13 06:50:34,548 INFO L231 Difference]: Finished difference. Result has 41 places, 29 transitions, 116 flow [2024-10-13 06:50:34,548 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=116, PETRI_PLACES=41, PETRI_TRANSITIONS=29} [2024-10-13 06:50:34,550 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 17 predicate places. [2024-10-13 06:50:34,550 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 29 transitions, 116 flow [2024-10-13 06:50:34,550 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 06:50:34,550 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:50:34,550 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 2, 1, 1, 1, 1, 1] [2024-10-13 06:50:34,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-13 06:50:34,751 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-10-13 06:50:34,751 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-13 06:50:34,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:50:34,752 INFO L85 PathProgramCache]: Analyzing trace with hash -624295803, now seen corresponding path program 3 times [2024-10-13 06:50:34,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:50:34,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024409208] [2024-10-13 06:50:34,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:50:34,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:50:34,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 06:50:34,777 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-13 06:50:34,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 06:50:34,812 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-13 06:50:34,813 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-13 06:50:34,813 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-10-13 06:50:34,815 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-10-13 06:50:34,815 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2024-10-13 06:50:34,815 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-13 06:50:34,815 INFO L407 BasicCegarLoop]: Path program histogram: [3, 1] [2024-10-13 06:50:34,817 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-13 06:50:34,817 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-13 06:50:34,835 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-13 06:50:34,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 43 transitions, 96 flow [2024-10-13 06:50:34,842 INFO L124 PetriNetUnfolderBase]: 7/48 cut-off events. [2024-10-13 06:50:34,843 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-13 06:50:34,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 48 events. 7/48 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 109 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 37. Up to 3 conditions per place. [2024-10-13 06:50:34,843 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 43 transitions, 96 flow [2024-10-13 06:50:34,844 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 43 transitions, 96 flow [2024-10-13 06:50:34,845 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 06:50:34,845 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;@5e886adb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 06:50:34,845 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-10-13 06:50:34,866 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 06:50:34,866 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-10-13 06:50:34,867 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-13 06:50:34,867 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:50:34,867 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 06:50:34,867 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-10-13 06:50:34,867 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:50:34,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1675961929, now seen corresponding path program 1 times [2024-10-13 06:50:34,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:50:34,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74346562] [2024-10-13 06:50:34,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:50:34,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:50:34,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:50:34,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:50:34,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 06:50:34,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74346562] [2024-10-13 06:50:34,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74346562] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 06:50:34,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 06:50:34,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 06:50:34,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931025895] [2024-10-13 06:50:34,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 06:50:34,898 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 06:50:34,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 06:50:34,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 06:50:34,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 06:50:34,899 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-10-13 06:50:34,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 43 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 06:50:34,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 06:50:34,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-10-13 06:50:34,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 06:50:35,054 INFO L124 PetriNetUnfolderBase]: 553/1101 cut-off events. [2024-10-13 06:50:35,055 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-10-13 06:50:35,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2003 conditions, 1101 events. 553/1101 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 5509 event pairs, 468 based on Foata normal form. 92/1075 useless extension candidates. Maximal degree in co-relation 1219. Up to 866 conditions per place. [2024-10-13 06:50:35,064 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 26 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2024-10-13 06:50:35,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 41 transitions, 148 flow [2024-10-13 06:50:35,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 06:50:35,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 06:50:35,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-10-13 06:50:35,069 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5503875968992248 [2024-10-13 06:50:35,070 INFO L175 Difference]: Start difference. First operand has 41 places, 43 transitions, 96 flow. Second operand 3 states and 71 transitions. [2024-10-13 06:50:35,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 41 transitions, 148 flow [2024-10-13 06:50:35,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 41 transitions, 148 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 06:50:35,072 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 102 flow [2024-10-13 06:50:35,074 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=41} [2024-10-13 06:50:35,075 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2024-10-13 06:50:35,075 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 102 flow [2024-10-13 06:50:35,075 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 06:50:35,075 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:50:35,075 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 06:50:35,075 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-13 06:50:35,076 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-10-13 06:50:35,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:50:35,076 INFO L85 PathProgramCache]: Analyzing trace with hash -221938941, now seen corresponding path program 1 times [2024-10-13 06:50:35,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:50:35,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720746066] [2024-10-13 06:50:35,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:50:35,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:50:35,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:50:35,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:50:35,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 06:50:35,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720746066] [2024-10-13 06:50:35,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720746066] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 06:50:35,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193003309] [2024-10-13 06:50:35,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:50:35,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 06:50:35,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 06:50:35,117 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 06:50:35,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-13 06:50:35,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:50:35,176 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-13 06:50:35,177 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 06:50:35,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:50:35,184 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 06:50:35,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:50:35,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193003309] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 06:50:35,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 06:50:35,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-13 06:50:35,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854716117] [2024-10-13 06:50:35,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 06:50:35,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-13 06:50:35,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 06:50:35,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-13 06:50:35,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-13 06:50:35,196 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-10-13 06:50:35,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 102 flow. Second operand has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 06:50:35,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 06:50:35,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-10-13 06:50:35,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 06:50:35,338 INFO L124 PetriNetUnfolderBase]: 553/1104 cut-off events. [2024-10-13 06:50:35,339 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-10-13 06:50:35,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2019 conditions, 1104 events. 553/1104 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 5520 event pairs, 468 based on Foata normal form. 0/986 useless extension candidates. Maximal degree in co-relation 2006. Up to 866 conditions per place. [2024-10-13 06:50:35,345 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 26 selfloop transitions, 5 changer transitions 0/44 dead transitions. [2024-10-13 06:50:35,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 44 transitions, 176 flow [2024-10-13 06:50:35,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 06:50:35,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 06:50:35,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-10-13 06:50:35,346 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-10-13 06:50:35,346 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 102 flow. Second operand 6 states and 112 transitions. [2024-10-13 06:50:35,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 44 transitions, 176 flow [2024-10-13 06:50:35,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 44 transitions, 172 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-13 06:50:35,349 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 134 flow [2024-10-13 06:50:35,350 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=134, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2024-10-13 06:50:35,350 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2024-10-13 06:50:35,350 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 134 flow [2024-10-13 06:50:35,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 06:50:35,350 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:50:35,351 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 06:50:35,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-13 06:50:35,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 06:50:35,552 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-10-13 06:50:35,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:50:35,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1135707337, now seen corresponding path program 2 times [2024-10-13 06:50:35,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:50:35,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80374745] [2024-10-13 06:50:35,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:50:35,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:50:35,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:50:35,625 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:50:35,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 06:50:35,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80374745] [2024-10-13 06:50:35,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80374745] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 06:50:35,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429955818] [2024-10-13 06:50:35,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-13 06:50:35,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 06:50:35,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 06:50:35,629 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 06:50:35,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-13 06:50:35,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-13 06:50:35,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-13 06:50:35,693 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-13 06:50:35,694 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 06:50:35,708 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-13 06:50:35,708 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-13 06:50:35,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429955818] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 06:50:35,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-13 06:50:35,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2024-10-13 06:50:35,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134924278] [2024-10-13 06:50:35,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 06:50:35,709 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 06:50:35,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 06:50:35,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 06:50:35,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-10-13 06:50:35,715 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-10-13 06:50:35,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 06:50:35,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 06:50:35,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-10-13 06:50:35,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 06:50:35,919 INFO L124 PetriNetUnfolderBase]: 951/1882 cut-off events. [2024-10-13 06:50:35,919 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2024-10-13 06:50:35,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3466 conditions, 1882 events. 951/1882 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 10896 event pairs, 418 based on Foata normal form. 0/1678 useless extension candidates. Maximal degree in co-relation 3431. Up to 784 conditions per place. [2024-10-13 06:50:35,930 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 50 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2024-10-13 06:50:35,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 64 transitions, 283 flow [2024-10-13 06:50:35,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 06:50:35,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 06:50:35,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2024-10-13 06:50:35,931 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6589147286821705 [2024-10-13 06:50:35,931 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 134 flow. Second operand 3 states and 85 transitions. [2024-10-13 06:50:35,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 64 transitions, 283 flow [2024-10-13 06:50:35,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 64 transitions, 269 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-13 06:50:35,933 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 134 flow [2024-10-13 06:50:35,933 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2024-10-13 06:50:35,933 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 12 predicate places. [2024-10-13 06:50:35,934 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 134 flow [2024-10-13 06:50:35,934 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 06:50:35,934 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:50:35,934 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1] [2024-10-13 06:50:35,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-13 06:50:36,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 06:50:36,139 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)] === [2024-10-13 06:50:36,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:50:36,140 INFO L85 PathProgramCache]: Analyzing trace with hash -478068286, now seen corresponding path program 1 times [2024-10-13 06:50:36,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:50:36,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874484639] [2024-10-13 06:50:36,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:50:36,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:50:36,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:50:36,227 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-13 06:50:36,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 06:50:36,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874484639] [2024-10-13 06:50:36,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874484639] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 06:50:36,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194753511] [2024-10-13 06:50:36,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:50:36,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 06:50:36,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 06:50:36,230 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 06:50:36,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-13 06:50:36,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:50:36,291 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-13 06:50:36,292 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 06:50:36,304 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-13 06:50:36,304 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 06:50:36,342 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-13 06:50:36,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194753511] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 06:50:36,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 06:50:36,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-10-13 06:50:36,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299087945] [2024-10-13 06:50:36,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 06:50:36,343 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-13 06:50:36,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 06:50:36,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-13 06:50:36,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-10-13 06:50:36,344 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-10-13 06:50:36,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 134 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 06:50:36,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 06:50:36,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-10-13 06:50:36,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 06:50:36,556 INFO L124 PetriNetUnfolderBase]: 966/1930 cut-off events. [2024-10-13 06:50:36,556 INFO L125 PetriNetUnfolderBase]: For 273/273 co-relation queries the response was YES. [2024-10-13 06:50:36,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3713 conditions, 1930 events. 966/1930 cut-off events. For 273/273 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 11245 event pairs, 818 based on Foata normal form. 2/1782 useless extension candidates. Maximal degree in co-relation 3675. Up to 1501 conditions per place. [2024-10-13 06:50:36,568 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 28 selfloop transitions, 7 changer transitions 0/47 dead transitions. [2024-10-13 06:50:36,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 47 transitions, 216 flow [2024-10-13 06:50:36,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 06:50:36,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-13 06:50:36,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-10-13 06:50:36,570 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-10-13 06:50:36,570 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 134 flow. Second operand 8 states and 139 transitions. [2024-10-13 06:50:36,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 47 transitions, 216 flow [2024-10-13 06:50:36,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 47 transitions, 212 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 06:50:36,574 INFO L231 Difference]: Finished difference. Result has 60 places, 47 transitions, 166 flow [2024-10-13 06:50:36,575 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=166, PETRI_PLACES=60, PETRI_TRANSITIONS=47} [2024-10-13 06:50:36,575 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 19 predicate places. [2024-10-13 06:50:36,576 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 47 transitions, 166 flow [2024-10-13 06:50:36,576 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 06:50:36,576 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:50:36,576 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 3, 2, 1, 1, 1, 1, 1] [2024-10-13 06:50:36,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-13 06:50:36,777 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 06:50:36,777 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-10-13 06:50:36,778 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:50:36,778 INFO L85 PathProgramCache]: Analyzing trace with hash 378366210, now seen corresponding path program 2 times [2024-10-13 06:50:36,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:50:36,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601958024] [2024-10-13 06:50:36,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:50:36,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:50:36,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 06:50:36,791 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-13 06:50:36,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 06:50:36,808 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-13 06:50:36,810 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-13 06:50:36,810 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-10-13 06:50:36,810 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-10-13 06:50:36,810 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-10-13 06:50:36,811 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-10-13 06:50:36,811 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-13 06:50:36,811 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1] [2024-10-13 06:50:36,811 WARN L239 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-13 06:50:36,811 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-13 06:50:36,831 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-13 06:50:36,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 61 transitions, 140 flow [2024-10-13 06:50:36,837 INFO L124 PetriNetUnfolderBase]: 10/69 cut-off events. [2024-10-13 06:50:36,837 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-10-13 06:50:36,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 69 events. 10/69 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 186 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 54. Up to 4 conditions per place. [2024-10-13 06:50:36,838 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 61 transitions, 140 flow [2024-10-13 06:50:36,838 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 61 transitions, 140 flow [2024-10-13 06:50:36,839 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 06:50:36,839 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;@5e886adb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 06:50:36,839 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-10-13 06:50:36,841 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 06:50:36,841 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-10-13 06:50:36,841 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-13 06:50:36,841 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:50:36,841 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 06:50:36,841 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-10-13 06:50:36,841 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:50:36,841 INFO L85 PathProgramCache]: Analyzing trace with hash 736650330, now seen corresponding path program 1 times [2024-10-13 06:50:36,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:50:36,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432274970] [2024-10-13 06:50:36,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:50:36,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:50:36,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:50:36,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:50:36,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 06:50:36,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432274970] [2024-10-13 06:50:36,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432274970] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 06:50:36,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 06:50:36,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 06:50:36,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331413558] [2024-10-13 06:50:36,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 06:50:36,859 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 06:50:36,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 06:50:36,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 06:50:36,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 06:50:36,860 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 61 [2024-10-13 06:50:36,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 61 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 06:50:36,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 06:50:36,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 61 [2024-10-13 06:50:36,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 06:50:37,808 INFO L124 PetriNetUnfolderBase]: 8815/14150 cut-off events. [2024-10-13 06:50:37,809 INFO L125 PetriNetUnfolderBase]: For 722/722 co-relation queries the response was YES. [2024-10-13 06:50:37,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26553 conditions, 14150 events. 8815/14150 cut-off events. For 722/722 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 92922 event pairs, 7668 based on Foata normal form. 1558/14142 useless extension candidates. Maximal degree in co-relation 2699. Up to 11966 conditions per place. [2024-10-13 06:50:37,876 INFO L140 encePairwiseOnDemand]: 54/61 looper letters, 37 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2024-10-13 06:50:37,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 58 transitions, 212 flow [2024-10-13 06:50:37,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 06:50:37,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 06:50:37,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 101 transitions. [2024-10-13 06:50:37,878 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5519125683060109 [2024-10-13 06:50:37,878 INFO L175 Difference]: Start difference. First operand has 58 places, 61 transitions, 140 flow. Second operand 3 states and 101 transitions. [2024-10-13 06:50:37,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 58 transitions, 212 flow [2024-10-13 06:50:37,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 58 transitions, 210 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-10-13 06:50:37,880 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 142 flow [2024-10-13 06:50:37,880 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2024-10-13 06:50:37,880 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 2 predicate places. [2024-10-13 06:50:37,880 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 142 flow [2024-10-13 06:50:37,881 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 06:50:37,881 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:50:37,881 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 06:50:37,881 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-13 06:50:37,881 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-10-13 06:50:37,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:50:37,881 INFO L85 PathProgramCache]: Analyzing trace with hash 253176913, now seen corresponding path program 1 times [2024-10-13 06:50:37,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:50:37,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888923710] [2024-10-13 06:50:37,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:50:37,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:50:37,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:50:37,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:50:37,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 06:50:37,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888923710] [2024-10-13 06:50:37,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888923710] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 06:50:37,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634281639] [2024-10-13 06:50:37,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:50:37,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 06:50:37,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 06:50:37,911 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 06:50:37,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-13 06:50:37,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:50:37,973 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-13 06:50:37,973 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 06:50:37,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:50:37,980 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 06:50:37,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:50:37,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634281639] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 06:50:37,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 06:50:37,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-13 06:50:37,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536722523] [2024-10-13 06:50:37,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 06:50:37,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-13 06:50:37,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 06:50:37,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-13 06:50:37,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-13 06:50:37,993 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 61 [2024-10-13 06:50:37,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 142 flow. Second operand has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 06:50:37,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 06:50:37,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 61 [2024-10-13 06:50:37,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 06:50:39,106 INFO L124 PetriNetUnfolderBase]: 8815/14153 cut-off events. [2024-10-13 06:50:39,106 INFO L125 PetriNetUnfolderBase]: For 426/426 co-relation queries the response was YES. [2024-10-13 06:50:39,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26469 conditions, 14153 events. 8815/14153 cut-off events. For 426/426 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 93027 event pairs, 7668 based on Foata normal form. 0/12587 useless extension candidates. Maximal degree in co-relation 26455. Up to 11966 conditions per place. [2024-10-13 06:50:39,163 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 37 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2024-10-13 06:50:39,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 61 transitions, 238 flow [2024-10-13 06:50:39,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 06:50:39,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 06:50:39,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-10-13 06:50:39,165 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4344262295081967 [2024-10-13 06:50:39,165 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 142 flow. Second operand 6 states and 159 transitions. [2024-10-13 06:50:39,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 61 transitions, 238 flow [2024-10-13 06:50:39,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 61 transitions, 234 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-13 06:50:39,167 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 174 flow [2024-10-13 06:50:39,167 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=174, PETRI_PLACES=67, PETRI_TRANSITIONS=61} [2024-10-13 06:50:39,167 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 9 predicate places. [2024-10-13 06:50:39,167 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 174 flow [2024-10-13 06:50:39,168 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 06:50:39,168 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:50:39,168 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 06:50:39,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-13 06:50:39,372 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 06:50:39,373 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-10-13 06:50:39,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:50:39,374 INFO L85 PathProgramCache]: Analyzing trace with hash -447337958, now seen corresponding path program 2 times [2024-10-13 06:50:39,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:50:39,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118045138] [2024-10-13 06:50:39,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:50:39,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:50:39,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:50:39,460 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-13 06:50:39,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 06:50:39,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118045138] [2024-10-13 06:50:39,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118045138] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 06:50:39,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 06:50:39,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 06:50:39,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295686476] [2024-10-13 06:50:39,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 06:50:39,461 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 06:50:39,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 06:50:39,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 06:50:39,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 06:50:39,465 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 61 [2024-10-13 06:50:39,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 61 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 06:50:39,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 06:50:39,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 61 [2024-10-13 06:50:39,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 06:50:40,949 INFO L124 PetriNetUnfolderBase]: 15165/24285 cut-off events. [2024-10-13 06:50:40,949 INFO L125 PetriNetUnfolderBase]: For 649/649 co-relation queries the response was YES. [2024-10-13 06:50:40,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45550 conditions, 24285 events. 15165/24285 cut-off events. For 649/649 co-relation queries the response was YES. Maximal size of possible extension queue 788. Compared 175318 event pairs, 6868 based on Foata normal form. 0/21619 useless extension candidates. Maximal degree in co-relation 45514. Up to 10774 conditions per place. [2024-10-13 06:50:41,250 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 72 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2024-10-13 06:50:41,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 92 transitions, 394 flow [2024-10-13 06:50:41,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 06:50:41,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 06:50:41,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2024-10-13 06:50:41,251 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6830601092896175 [2024-10-13 06:50:41,251 INFO L175 Difference]: Start difference. First operand has 67 places, 61 transitions, 174 flow. Second operand 3 states and 125 transitions. [2024-10-13 06:50:41,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 92 transitions, 394 flow [2024-10-13 06:50:41,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 92 transitions, 380 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-13 06:50:41,254 INFO L231 Difference]: Finished difference. Result has 70 places, 62 transitions, 174 flow [2024-10-13 06:50:41,254 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=70, PETRI_TRANSITIONS=62} [2024-10-13 06:50:41,255 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 12 predicate places. [2024-10-13 06:50:41,255 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 62 transitions, 174 flow [2024-10-13 06:50:41,255 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 06:50:41,255 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:50:41,255 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 06:50:41,255 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-13 06:50:41,255 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-10-13 06:50:41,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:50:41,256 INFO L85 PathProgramCache]: Analyzing trace with hash 615573716, now seen corresponding path program 1 times [2024-10-13 06:50:41,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:50:41,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565637960] [2024-10-13 06:50:41,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:50:41,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:50:41,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:50:41,289 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-10-13 06:50:41,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 06:50:41,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565637960] [2024-10-13 06:50:41,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565637960] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 06:50:41,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 06:50:41,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 06:50:41,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569372120] [2024-10-13 06:50:41,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 06:50:41,290 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 06:50:41,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 06:50:41,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 06:50:41,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 06:50:41,293 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 61 [2024-10-13 06:50:41,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 62 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 06:50:41,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 06:50:41,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 61 [2024-10-13 06:50:41,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 06:50:43,862 INFO L124 PetriNetUnfolderBase]: 26272/41960 cut-off events. [2024-10-13 06:50:43,863 INFO L125 PetriNetUnfolderBase]: For 5525/5525 co-relation queries the response was YES. [2024-10-13 06:50:43,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81914 conditions, 41960 events. 26272/41960 cut-off events. For 5525/5525 co-relation queries the response was YES. Maximal size of possible extension queue 1361. Compared 326172 event pairs, 11890 based on Foata normal form. 0/38398 useless extension candidates. Maximal degree in co-relation 81883. Up to 18619 conditions per place. [2024-10-13 06:50:44,072 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 75 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2024-10-13 06:50:44,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 94 transitions, 409 flow [2024-10-13 06:50:44,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 06:50:44,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 06:50:44,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 124 transitions. [2024-10-13 06:50:44,073 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6775956284153005 [2024-10-13 06:50:44,073 INFO L175 Difference]: Start difference. First operand has 70 places, 62 transitions, 174 flow. Second operand 3 states and 124 transitions. [2024-10-13 06:50:44,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 94 transitions, 409 flow [2024-10-13 06:50:44,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 94 transitions, 401 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 06:50:44,095 INFO L231 Difference]: Finished difference. Result has 72 places, 63 transitions, 184 flow [2024-10-13 06:50:44,095 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=72, PETRI_TRANSITIONS=63} [2024-10-13 06:50:44,096 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 14 predicate places. [2024-10-13 06:50:44,096 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 63 transitions, 184 flow [2024-10-13 06:50:44,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 06:50:44,097 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:50:44,097 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1] [2024-10-13 06:50:44,097 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-13 06:50:44,097 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-10-13 06:50:44,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:50:44,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1682315564, now seen corresponding path program 1 times [2024-10-13 06:50:44,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:50:44,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780877244] [2024-10-13 06:50:44,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:50:44,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:50:44,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:50:44,151 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-13 06:50:44,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 06:50:44,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780877244] [2024-10-13 06:50:44,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780877244] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 06:50:44,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207575668] [2024-10-13 06:50:44,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:50:44,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 06:50:44,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 06:50:44,153 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 06:50:44,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-13 06:50:44,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:50:44,224 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-13 06:50:44,225 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 06:50:44,238 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-13 06:50:44,240 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 06:50:44,270 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-13 06:50:44,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207575668] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 06:50:44,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 06:50:44,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-10-13 06:50:44,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961151822] [2024-10-13 06:50:44,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 06:50:44,272 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-13 06:50:44,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 06:50:44,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-13 06:50:44,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-10-13 06:50:44,272 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 61 [2024-10-13 06:50:44,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 63 transitions, 184 flow. Second operand has 9 states, 9 states have (on average 20.77777777777778) internal successors, (187), 9 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 06:50:44,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 06:50:44,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 61 [2024-10-13 06:50:44,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 06:50:47,206 INFO L124 PetriNetUnfolderBase]: 26512/42563 cut-off events. [2024-10-13 06:50:47,207 INFO L125 PetriNetUnfolderBase]: For 6954/6954 co-relation queries the response was YES. [2024-10-13 06:50:47,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84762 conditions, 42563 events. 26512/42563 cut-off events. For 6954/6954 co-relation queries the response was YES. Maximal size of possible extension queue 1389. Compared 332214 event pairs, 22914 based on Foata normal form. 2/39877 useless extension candidates. Maximal degree in co-relation 84722. Up to 35624 conditions per place. [2024-10-13 06:50:47,451 INFO L140 encePairwiseOnDemand]: 58/61 looper letters, 41 selfloop transitions, 7 changer transitions 0/65 dead transitions. [2024-10-13 06:50:47,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 65 transitions, 292 flow [2024-10-13 06:50:47,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 06:50:47,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-13 06:50:47,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-10-13 06:50:47,452 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4057377049180328 [2024-10-13 06:50:47,452 INFO L175 Difference]: Start difference. First operand has 72 places, 63 transitions, 184 flow. Second operand 8 states and 198 transitions. [2024-10-13 06:50:47,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 65 transitions, 292 flow [2024-10-13 06:50:47,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 65 transitions, 288 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 06:50:47,486 INFO L231 Difference]: Finished difference. Result has 79 places, 65 transitions, 216 flow [2024-10-13 06:50:47,487 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=61, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=216, PETRI_PLACES=79, PETRI_TRANSITIONS=65} [2024-10-13 06:50:47,487 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 21 predicate places. [2024-10-13 06:50:47,487 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 65 transitions, 216 flow [2024-10-13 06:50:47,487 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.77777777777778) internal successors, (187), 9 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 06:50:47,487 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:50:47,488 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 4, 3, 1, 1, 1, 1, 1, 1] [2024-10-13 06:50:47,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-13 06:50:47,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 06:50:47,688 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-10-13 06:50:47,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:50:47,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1343367604, now seen corresponding path program 2 times [2024-10-13 06:50:47,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:50:47,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582915934] [2024-10-13 06:50:47,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:50:47,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:50:47,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 06:50:47,714 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-13 06:50:47,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 06:50:47,727 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-13 06:50:47,727 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-13 06:50:47,727 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-10-13 06:50:47,728 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-10-13 06:50:47,728 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-10-13 06:50:47,728 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-10-13 06:50:47,728 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-10-13 06:50:47,728 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-13 06:50:47,728 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2024-10-13 06:50:47,729 WARN L239 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-13 06:50:47,729 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-10-13 06:50:47,764 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-13 06:50:47,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 79 transitions, 186 flow [2024-10-13 06:50:47,774 INFO L124 PetriNetUnfolderBase]: 13/90 cut-off events. [2024-10-13 06:50:47,775 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-10-13 06:50:47,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 90 events. 13/90 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 270 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 79. Up to 5 conditions per place. [2024-10-13 06:50:47,775 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 79 transitions, 186 flow [2024-10-13 06:50:47,776 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 79 transitions, 186 flow [2024-10-13 06:50:47,777 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 06:50:47,777 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;@5e886adb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 06:50:47,777 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-10-13 06:50:47,779 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 06:50:47,779 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2024-10-13 06:50:47,779 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-13 06:50:47,779 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:50:47,780 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 06:50:47,780 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-10-13 06:50:47,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:50:47,780 INFO L85 PathProgramCache]: Analyzing trace with hash 431376299, now seen corresponding path program 1 times [2024-10-13 06:50:47,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:50:47,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489833975] [2024-10-13 06:50:47,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:50:47,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:50:47,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:50:47,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:50:47,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 06:50:47,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489833975] [2024-10-13 06:50:47,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489833975] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 06:50:47,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 06:50:47,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 06:50:47,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315240520] [2024-10-13 06:50:47,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 06:50:47,808 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 06:50:47,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 06:50:47,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 06:50:47,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 06:50:47,809 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 79 [2024-10-13 06:50:47,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 79 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 06:50:47,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 06:50:47,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 79 [2024-10-13 06:50:47,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 06:50:59,254 INFO L124 PetriNetUnfolderBase]: 121273/173906 cut-off events. [2024-10-13 06:50:59,254 INFO L125 PetriNetUnfolderBase]: For 12414/12414 co-relation queries the response was YES. [2024-10-13 06:50:59,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332310 conditions, 173906 events. 121273/173906 cut-off events. For 12414/12414 co-relation queries the response was YES. Maximal size of possible extension queue 4234. Compared 1306096 event pairs, 106668 based on Foata normal form. 22182/177004 useless extension candidates. Maximal degree in co-relation 26653. Up to 152966 conditions per place. [2024-10-13 06:51:00,380 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 48 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2024-10-13 06:51:00,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 75 transitions, 278 flow [2024-10-13 06:51:00,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 06:51:00,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 06:51:00,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 131 transitions. [2024-10-13 06:51:00,381 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5527426160337553 [2024-10-13 06:51:00,381 INFO L175 Difference]: Start difference. First operand has 75 places, 79 transitions, 186 flow. Second operand 3 states and 131 transitions. [2024-10-13 06:51:00,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 75 transitions, 278 flow [2024-10-13 06:51:00,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 75 transitions, 272 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-10-13 06:51:00,386 INFO L231 Difference]: Finished difference. Result has 77 places, 75 transitions, 182 flow [2024-10-13 06:51:00,386 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=77, PETRI_TRANSITIONS=75} [2024-10-13 06:51:00,387 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 2 predicate places. [2024-10-13 06:51:00,387 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 75 transitions, 182 flow [2024-10-13 06:51:00,387 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 06:51:00,387 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 06:51:00,387 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 06:51:00,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-10-13 06:51:00,387 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-10-13 06:51:00,387 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 06:51:00,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1107078927, now seen corresponding path program 1 times [2024-10-13 06:51:00,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 06:51:00,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654505014] [2024-10-13 06:51:00,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:51:00,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 06:51:00,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:51:00,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:51:00,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 06:51:00,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654505014] [2024-10-13 06:51:00,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654505014] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 06:51:00,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996229398] [2024-10-13 06:51:00,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 06:51:00,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 06:51:00,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 06:51:00,418 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-13 06:51:00,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-13 06:51:00,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 06:51:00,490 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-13 06:51:00,491 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 06:51:00,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:51:00,497 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 06:51:00,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 06:51:00,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996229398] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 06:51:00,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 06:51:00,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-10-13 06:51:00,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212324581] [2024-10-13 06:51:00,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 06:51:00,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-13 06:51:00,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 06:51:00,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-13 06:51:00,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-13 06:51:00,512 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 79 [2024-10-13 06:51:00,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 75 transitions, 182 flow. Second operand has 7 states, 7 states have (on average 26.714285714285715) internal successors, (187), 7 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 06:51:00,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 06:51:00,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 79 [2024-10-13 06:51:00,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand