./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-mult-4.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fca748b1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-mult-4.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b81cf2d80bc77dedaac253250be737ceaa09f6e691f026864fe6fd5cb48c2489 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 09:43:50,066 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 09:43:50,146 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-20 09:43:50,153 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 09:43:50,154 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 09:43:50,175 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 09:43:50,176 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 09:43:50,176 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 09:43:50,177 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 09:43:50,177 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 09:43:50,178 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 09:43:50,178 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 09:43:50,179 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 09:43:50,179 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 09:43:50,180 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 09:43:50,180 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 09:43:50,181 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-20 09:43:50,181 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 09:43:50,181 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 09:43:50,182 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 09:43:50,182 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 09:43:50,183 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-20 09:43:50,184 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 09:43:50,184 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-20 09:43:50,184 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 09:43:50,185 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 09:43:50,185 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-20 09:43:50,185 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 09:43:50,186 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 09:43:50,186 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 09:43:50,186 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 09:43:50,187 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 09:43:50,187 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 09:43:50,187 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 09:43:50,188 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 09:43:50,188 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-20 09:43:50,188 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 09:43:50,189 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 09:43:50,189 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 09:43:50,189 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 09:43:50,190 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 09:43:50,194 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 09:43:50,195 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b81cf2d80bc77dedaac253250be737ceaa09f6e691f026864fe6fd5cb48c2489 [2024-11-20 09:43:50,471 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 09:43:50,494 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 09:43:50,498 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 09:43:50,499 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 09:43:50,500 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 09:43:50,501 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-mult-4.wvr.c [2024-11-20 09:43:51,944 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 09:43:52,166 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 09:43:52,167 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-mult-4.wvr.c [2024-11-20 09:43:52,175 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/780a17237/ec435ac3351846cc82328137bffcb443/FLAGc7fed8df8 [2024-11-20 09:43:52,512 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/780a17237/ec435ac3351846cc82328137bffcb443 [2024-11-20 09:43:52,515 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 09:43:52,516 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 09:43:52,517 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 09:43:52,517 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 09:43:52,522 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 09:43:52,522 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:43:52" (1/1) ... [2024-11-20 09:43:52,523 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@448b7c6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:43:52, skipping insertion in model container [2024-11-20 09:43:52,523 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:43:52" (1/1) ... [2024-11-20 09:43:52,552 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 09:43:52,754 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-mult-4.wvr.c[2664,2677] [2024-11-20 09:43:52,759 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 09:43:52,766 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 09:43:52,789 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-mult-4.wvr.c[2664,2677] [2024-11-20 09:43:52,790 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 09:43:52,807 INFO L204 MainTranslator]: Completed translation [2024-11-20 09:43:52,807 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:43:52 WrapperNode [2024-11-20 09:43:52,807 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 09:43:52,808 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 09:43:52,808 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 09:43:52,808 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 09:43:52,815 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:43:52" (1/1) ... [2024-11-20 09:43:52,822 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:43:52" (1/1) ... [2024-11-20 09:43:52,839 INFO L138 Inliner]: procedures = 22, calls = 22, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 98 [2024-11-20 09:43:52,840 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 09:43:52,840 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 09:43:52,841 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 09:43:52,841 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 09:43:52,852 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:43:52" (1/1) ... [2024-11-20 09:43:52,852 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:43:52" (1/1) ... [2024-11-20 09:43:52,854 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:43:52" (1/1) ... [2024-11-20 09:43:52,878 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-20 09:43:52,878 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:43:52" (1/1) ... [2024-11-20 09:43:52,879 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:43:52" (1/1) ... [2024-11-20 09:43:52,887 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:43:52" (1/1) ... [2024-11-20 09:43:52,894 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:43:52" (1/1) ... [2024-11-20 09:43:52,896 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:43:52" (1/1) ... [2024-11-20 09:43:52,896 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:43:52" (1/1) ... [2024-11-20 09:43:52,898 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 09:43:52,899 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 09:43:52,899 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 09:43:52,899 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 09:43:52,900 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:43:52" (1/1) ... [2024-11-20 09:43:52,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 09:43:52,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:43:52,936 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) [2024-11-20 09:43:52,939 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 [2024-11-20 09:43:52,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 09:43:52,989 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-20 09:43:52,989 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-20 09:43:52,989 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-20 09:43:52,989 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-20 09:43:52,989 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-20 09:43:52,989 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-20 09:43:52,990 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-20 09:43:52,991 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-20 09:43:52,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 09:43:52,991 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-20 09:43:52,992 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-20 09:43:52,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 09:43:52,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 09:43:52,993 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-20 09:43:53,114 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 09:43:53,124 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 09:43:53,415 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-20 09:43:53,415 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 09:43:53,557 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 09:43:53,557 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-20 09:43:53,558 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:43:53 BoogieIcfgContainer [2024-11-20 09:43:53,558 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 09:43:53,561 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 09:43:53,561 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 09:43:53,566 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 09:43:53,566 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:43:52" (1/3) ... [2024-11-20 09:43:53,567 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65383125 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:43:53, skipping insertion in model container [2024-11-20 09:43:53,567 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:43:52" (2/3) ... [2024-11-20 09:43:53,568 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65383125 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:43:53, skipping insertion in model container [2024-11-20 09:43:53,569 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:43:53" (3/3) ... [2024-11-20 09:43:53,570 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-mult-4.wvr.c [2024-11-20 09:43:53,588 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 09:43:53,589 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-20 09:43:53,589 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-20 09:43:53,661 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-20 09:43:53,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 40 transitions, 108 flow [2024-11-20 09:43:53,737 INFO L124 PetriNetUnfolderBase]: 4/36 cut-off events. [2024-11-20 09:43:53,737 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-20 09:43:53,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 36 events. 4/36 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 45 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2024-11-20 09:43:53,743 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 40 transitions, 108 flow [2024-11-20 09:43:53,746 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 35 transitions, 94 flow [2024-11-20 09:43:53,760 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 09:43:53,769 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;@137f12eb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 09:43:53,769 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-11-20 09:43:53,786 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 09:43:53,787 INFO L124 PetriNetUnfolderBase]: 4/34 cut-off events. [2024-11-20 09:43:53,788 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-20 09:43:53,788 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:43:53,789 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:43:53,789 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-20 09:43:53,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:43:53,794 INFO L85 PathProgramCache]: Analyzing trace with hash -196909692, now seen corresponding path program 1 times [2024-11-20 09:43:53,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:43:53,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286177693] [2024-11-20 09:43:53,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:53,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:43:53,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:54,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:54,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:43:54,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286177693] [2024-11-20 09:43:54,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286177693] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:43:54,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:43:54,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 09:43:54,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884016668] [2024-11-20 09:43:54,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:43:54,236 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 09:43:54,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:43:54,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 09:43:54,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 09:43:54,275 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-11-20 09:43:54,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 35 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:54,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:43:54,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-11-20 09:43:54,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:43:54,915 INFO L124 PetriNetUnfolderBase]: 3042/4228 cut-off events. [2024-11-20 09:43:54,916 INFO L125 PetriNetUnfolderBase]: For 340/340 co-relation queries the response was YES. [2024-11-20 09:43:54,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8628 conditions, 4228 events. 3042/4228 cut-off events. For 340/340 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 18771 event pairs, 763 based on Foata normal form. 152/4370 useless extension candidates. Maximal degree in co-relation 7622. Up to 3203 conditions per place. [2024-11-20 09:43:54,948 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 46 selfloop transitions, 3 changer transitions 2/56 dead transitions. [2024-11-20 09:43:54,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 56 transitions, 259 flow [2024-11-20 09:43:54,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 09:43:54,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 09:43:54,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2024-11-20 09:43:54,960 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.675 [2024-11-20 09:43:54,962 INFO L175 Difference]: Start difference. First operand has 44 places, 35 transitions, 94 flow. Second operand 3 states and 81 transitions. [2024-11-20 09:43:54,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 56 transitions, 259 flow [2024-11-20 09:43:54,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 56 transitions, 229 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-20 09:43:54,977 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 101 flow [2024-11-20 09:43:54,979 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=101, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2024-11-20 09:43:54,984 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, -5 predicate places. [2024-11-20 09:43:54,985 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 101 flow [2024-11-20 09:43:54,985 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:54,985 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:43:54,986 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:43:54,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 09:43:54,986 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-20 09:43:54,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:43:54,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1212674722, now seen corresponding path program 1 times [2024-11-20 09:43:54,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:43:54,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785530119] [2024-11-20 09:43:54,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:54,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:43:55,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:55,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:55,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:43:55,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785530119] [2024-11-20 09:43:55,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785530119] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:43:55,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:43:55,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 09:43:55,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154635758] [2024-11-20 09:43:55,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:43:55,184 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 09:43:55,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:43:55,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 09:43:55,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-20 09:43:55,191 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-20 09:43:55,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 101 flow. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:55,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:43:55,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-20 09:43:55,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:43:56,538 INFO L124 PetriNetUnfolderBase]: 11982/15969 cut-off events. [2024-11-20 09:43:56,539 INFO L125 PetriNetUnfolderBase]: For 965/965 co-relation queries the response was YES. [2024-11-20 09:43:56,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33885 conditions, 15969 events. 11982/15969 cut-off events. For 965/965 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 80300 event pairs, 4246 based on Foata normal form. 0/12597 useless extension candidates. Maximal degree in co-relation 9444. Up to 8562 conditions per place. [2024-11-20 09:43:56,656 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 81 selfloop transitions, 10 changer transitions 0/96 dead transitions. [2024-11-20 09:43:56,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 96 transitions, 418 flow [2024-11-20 09:43:56,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 09:43:56,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 09:43:56,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-11-20 09:43:56,659 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.645 [2024-11-20 09:43:56,660 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 101 flow. Second operand 5 states and 129 transitions. [2024-11-20 09:43:56,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 96 transitions, 418 flow [2024-11-20 09:43:56,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 96 transitions, 415 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 09:43:56,663 INFO L231 Difference]: Finished difference. Result has 45 places, 46 transitions, 165 flow [2024-11-20 09:43:56,663 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=165, PETRI_PLACES=45, PETRI_TRANSITIONS=46} [2024-11-20 09:43:56,664 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2024-11-20 09:43:56,664 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 46 transitions, 165 flow [2024-11-20 09:43:56,664 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:56,665 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:43:56,665 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:43:56,665 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-20 09:43:56,665 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-20 09:43:56,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:43:56,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1378229130, now seen corresponding path program 2 times [2024-11-20 09:43:56,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:43:56,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209986217] [2024-11-20 09:43:56,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:56,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:43:56,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:56,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:56,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:43:56,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209986217] [2024-11-20 09:43:56,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209986217] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:43:56,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:43:56,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-20 09:43:56,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125621210] [2024-11-20 09:43:56,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:43:56,963 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 09:43:56,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:43:56,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 09:43:56,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-20 09:43:56,993 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-20 09:43:56,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 46 transitions, 165 flow. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:56,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:43:56,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-20 09:43:56,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:43:59,120 INFO L124 PetriNetUnfolderBase]: 17012/23075 cut-off events. [2024-11-20 09:43:59,121 INFO L125 PetriNetUnfolderBase]: For 10240/10264 co-relation queries the response was YES. [2024-11-20 09:43:59,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59304 conditions, 23075 events. 17012/23075 cut-off events. For 10240/10264 co-relation queries the response was YES. Maximal size of possible extension queue 994. Compared 128533 event pairs, 1739 based on Foata normal form. 1551/24214 useless extension candidates. Maximal degree in co-relation 34291. Up to 6690 conditions per place. [2024-11-20 09:43:59,319 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 119 selfloop transitions, 23 changer transitions 2/149 dead transitions. [2024-11-20 09:43:59,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 149 transitions, 759 flow [2024-11-20 09:43:59,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 09:43:59,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 09:43:59,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-11-20 09:43:59,323 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6714285714285714 [2024-11-20 09:43:59,323 INFO L175 Difference]: Start difference. First operand has 45 places, 46 transitions, 165 flow. Second operand 7 states and 188 transitions. [2024-11-20 09:43:59,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 149 transitions, 759 flow [2024-11-20 09:43:59,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 149 transitions, 759 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-20 09:43:59,337 INFO L231 Difference]: Finished difference. Result has 57 places, 62 transitions, 355 flow [2024-11-20 09:43:59,337 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=355, PETRI_PLACES=57, PETRI_TRANSITIONS=62} [2024-11-20 09:43:59,338 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 13 predicate places. [2024-11-20 09:43:59,339 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 62 transitions, 355 flow [2024-11-20 09:43:59,339 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:59,339 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:43:59,340 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:43:59,340 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-20 09:43:59,340 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-20 09:43:59,341 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:43:59,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1181142688, now seen corresponding path program 3 times [2024-11-20 09:43:59,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:43:59,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932759220] [2024-11-20 09:43:59,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:43:59,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:43:59,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:43:59,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:43:59,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:43:59,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932759220] [2024-11-20 09:43:59,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932759220] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:43:59,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:43:59,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 09:43:59,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924104639] [2024-11-20 09:43:59,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:43:59,488 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 09:43:59,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:43:59,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 09:43:59,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 09:43:59,507 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-20 09:43:59,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 62 transitions, 355 flow. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:43:59,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:43:59,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-20 09:43:59,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:44:02,224 INFO L124 PetriNetUnfolderBase]: 22345/30237 cut-off events. [2024-11-20 09:44:02,225 INFO L125 PetriNetUnfolderBase]: For 50507/50583 co-relation queries the response was YES. [2024-11-20 09:44:02,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97892 conditions, 30237 events. 22345/30237 cut-off events. For 50507/50583 co-relation queries the response was YES. Maximal size of possible extension queue 1159. Compared 170935 event pairs, 6489 based on Foata normal form. 556/30186 useless extension candidates. Maximal degree in co-relation 53450. Up to 15419 conditions per place. [2024-11-20 09:44:02,554 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 103 selfloop transitions, 12 changer transitions 9/129 dead transitions. [2024-11-20 09:44:02,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 129 transitions, 891 flow [2024-11-20 09:44:02,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 09:44:02,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 09:44:02,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-11-20 09:44:02,557 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.645 [2024-11-20 09:44:02,557 INFO L175 Difference]: Start difference. First operand has 57 places, 62 transitions, 355 flow. Second operand 5 states and 129 transitions. [2024-11-20 09:44:02,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 129 transitions, 891 flow [2024-11-20 09:44:03,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 129 transitions, 879 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-11-20 09:44:03,004 INFO L231 Difference]: Finished difference. Result has 64 places, 64 transitions, 440 flow [2024-11-20 09:44:03,004 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=440, PETRI_PLACES=64, PETRI_TRANSITIONS=64} [2024-11-20 09:44:03,005 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 20 predicate places. [2024-11-20 09:44:03,005 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 64 transitions, 440 flow [2024-11-20 09:44:03,006 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:44:03,006 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:44:03,006 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:44:03,007 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-20 09:44:03,007 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-20 09:44:03,008 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:44:03,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1923555558, now seen corresponding path program 1 times [2024-11-20 09:44:03,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:44:03,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863960821] [2024-11-20 09:44:03,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:03,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:44:03,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:03,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:03,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:44:03,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863960821] [2024-11-20 09:44:03,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863960821] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:44:03,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:44:03,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 09:44:03,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885886019] [2024-11-20 09:44:03,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:44:03,233 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 09:44:03,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:44:03,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 09:44:03,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 09:44:03,238 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-20 09:44:03,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 64 transitions, 440 flow. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:44:03,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:44:03,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-20 09:44:03,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:44:05,299 INFO L124 PetriNetUnfolderBase]: 22445/30176 cut-off events. [2024-11-20 09:44:05,300 INFO L125 PetriNetUnfolderBase]: For 91411/91433 co-relation queries the response was YES. [2024-11-20 09:44:05,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110644 conditions, 30176 events. 22445/30176 cut-off events. For 91411/91433 co-relation queries the response was YES. Maximal size of possible extension queue 1126. Compared 166708 event pairs, 7842 based on Foata normal form. 114/29521 useless extension candidates. Maximal degree in co-relation 49421. Up to 15999 conditions per place. [2024-11-20 09:44:05,696 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 71 selfloop transitions, 9 changer transitions 29/114 dead transitions. [2024-11-20 09:44:05,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 114 transitions, 876 flow [2024-11-20 09:44:05,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 09:44:05,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 09:44:05,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-11-20 09:44:05,697 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-11-20 09:44:05,698 INFO L175 Difference]: Start difference. First operand has 64 places, 64 transitions, 440 flow. Second operand 5 states and 124 transitions. [2024-11-20 09:44:05,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 114 transitions, 876 flow [2024-11-20 09:44:05,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 114 transitions, 812 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-11-20 09:44:05,915 INFO L231 Difference]: Finished difference. Result has 68 places, 62 transitions, 413 flow [2024-11-20 09:44:05,915 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=397, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=413, PETRI_PLACES=68, PETRI_TRANSITIONS=62} [2024-11-20 09:44:05,916 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 24 predicate places. [2024-11-20 09:44:05,916 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 62 transitions, 413 flow [2024-11-20 09:44:05,916 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:44:05,917 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:44:05,917 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:44:05,917 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-20 09:44:05,917 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-20 09:44:05,918 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:44:05,918 INFO L85 PathProgramCache]: Analyzing trace with hash 861508722, now seen corresponding path program 4 times [2024-11-20 09:44:05,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:44:05,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778101104] [2024-11-20 09:44:05,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:05,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:44:05,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:06,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:06,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:44:06,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778101104] [2024-11-20 09:44:06,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778101104] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:44:06,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:44:06,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-20 09:44:06,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380423177] [2024-11-20 09:44:06,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:44:06,075 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 09:44:06,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:44:06,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 09:44:06,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-20 09:44:06,082 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-20 09:44:06,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 62 transitions, 413 flow. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:44:06,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:44:06,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-20 09:44:06,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:44:07,997 INFO L124 PetriNetUnfolderBase]: 21387/28703 cut-off events. [2024-11-20 09:44:07,998 INFO L125 PetriNetUnfolderBase]: For 74254/74326 co-relation queries the response was YES. [2024-11-20 09:44:08,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101382 conditions, 28703 events. 21387/28703 cut-off events. For 74254/74326 co-relation queries the response was YES. Maximal size of possible extension queue 1103. Compared 155781 event pairs, 6396 based on Foata normal form. 562/28612 useless extension candidates. Maximal degree in co-relation 65402. Up to 10986 conditions per place. [2024-11-20 09:44:08,199 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 105 selfloop transitions, 35 changer transitions 3/148 dead transitions. [2024-11-20 09:44:08,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 148 transitions, 1127 flow [2024-11-20 09:44:08,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 09:44:08,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 09:44:08,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-11-20 09:44:08,201 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-11-20 09:44:08,201 INFO L175 Difference]: Start difference. First operand has 68 places, 62 transitions, 413 flow. Second operand 6 states and 155 transitions. [2024-11-20 09:44:08,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 148 transitions, 1127 flow [2024-11-20 09:44:08,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 148 transitions, 1071 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-11-20 09:44:08,651 INFO L231 Difference]: Finished difference. Result has 71 places, 80 transitions, 689 flow [2024-11-20 09:44:08,651 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=689, PETRI_PLACES=71, PETRI_TRANSITIONS=80} [2024-11-20 09:44:08,652 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 27 predicate places. [2024-11-20 09:44:08,652 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 80 transitions, 689 flow [2024-11-20 09:44:08,652 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:44:08,652 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:44:08,653 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:44:08,653 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-20 09:44:08,653 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-20 09:44:08,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:44:08,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1556545025, now seen corresponding path program 1 times [2024-11-20 09:44:08,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:44:08,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712559869] [2024-11-20 09:44:08,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:08,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:44:08,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:08,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:08,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:44:08,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712559869] [2024-11-20 09:44:08,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712559869] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:44:08,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639635965] [2024-11-20 09:44:08,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:08,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:44:08,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:44:08,790 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) [2024-11-20 09:44:08,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-20 09:44:08,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:08,872 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 09:44:08,878 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:44:08,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:08,992 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:44:09,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:09,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639635965] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 09:44:09,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 09:44:09,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2024-11-20 09:44:09,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758464788] [2024-11-20 09:44:09,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:44:09,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 09:44:09,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:44:09,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 09:44:09,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-20 09:44:09,086 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-20 09:44:09,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 80 transitions, 689 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:44:09,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:44:09,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-20 09:44:09,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:44:11,389 INFO L124 PetriNetUnfolderBase]: 23218/31449 cut-off events. [2024-11-20 09:44:11,389 INFO L125 PetriNetUnfolderBase]: For 116623/116649 co-relation queries the response was YES. [2024-11-20 09:44:11,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126099 conditions, 31449 events. 23218/31449 cut-off events. For 116623/116649 co-relation queries the response was YES. Maximal size of possible extension queue 1214. Compared 177971 event pairs, 2979 based on Foata normal form. 915/31862 useless extension candidates. Maximal degree in co-relation 81751. Up to 15130 conditions per place. [2024-11-20 09:44:11,627 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 108 selfloop transitions, 21 changer transitions 0/134 dead transitions. [2024-11-20 09:44:11,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 134 transitions, 1364 flow [2024-11-20 09:44:11,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 09:44:11,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 09:44:11,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-11-20 09:44:11,628 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-11-20 09:44:11,628 INFO L175 Difference]: Start difference. First operand has 71 places, 80 transitions, 689 flow. Second operand 4 states and 98 transitions. [2024-11-20 09:44:11,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 134 transitions, 1364 flow [2024-11-20 09:44:12,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 134 transitions, 1268 flow, removed 39 selfloop flow, removed 1 redundant places. [2024-11-20 09:44:12,034 INFO L231 Difference]: Finished difference. Result has 73 places, 84 transitions, 737 flow [2024-11-20 09:44:12,034 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=625, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=737, PETRI_PLACES=73, PETRI_TRANSITIONS=84} [2024-11-20 09:44:12,035 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 29 predicate places. [2024-11-20 09:44:12,035 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 84 transitions, 737 flow [2024-11-20 09:44:12,035 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:44:12,035 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:44:12,035 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:44:12,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-20 09:44:12,236 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:44:12,236 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-20 09:44:12,237 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:44:12,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1417153903, now seen corresponding path program 2 times [2024-11-20 09:44:12,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:44:12,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476896046] [2024-11-20 09:44:12,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:12,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:44:12,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:12,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:44:12,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:44:12,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476896046] [2024-11-20 09:44:12,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476896046] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:44:12,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:44:12,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 09:44:12,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322532657] [2024-11-20 09:44:12,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:44:12,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 09:44:12,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:44:12,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 09:44:12,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-20 09:44:12,392 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-20 09:44:12,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 84 transitions, 737 flow. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 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) [2024-11-20 09:44:12,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:44:12,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-20 09:44:12,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:44:15,177 INFO L124 PetriNetUnfolderBase]: 28978/38784 cut-off events. [2024-11-20 09:44:15,178 INFO L125 PetriNetUnfolderBase]: For 175708/175746 co-relation queries the response was YES. [2024-11-20 09:44:15,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167271 conditions, 38784 events. 28978/38784 cut-off events. For 175708/175746 co-relation queries the response was YES. Maximal size of possible extension queue 1469. Compared 219521 event pairs, 7781 based on Foata normal form. 200/38198 useless extension candidates. Maximal degree in co-relation 115193. Up to 19286 conditions per place. [2024-11-20 09:44:15,848 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 148 selfloop transitions, 24 changer transitions 1/178 dead transitions. [2024-11-20 09:44:15,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 178 transitions, 1840 flow [2024-11-20 09:44:15,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 09:44:15,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 09:44:15,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-11-20 09:44:15,849 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.615 [2024-11-20 09:44:15,849 INFO L175 Difference]: Start difference. First operand has 73 places, 84 transitions, 737 flow. Second operand 5 states and 123 transitions. [2024-11-20 09:44:15,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 178 transitions, 1840 flow [2024-11-20 09:44:16,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 178 transitions, 1789 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-20 09:44:16,337 INFO L231 Difference]: Finished difference. Result has 78 places, 97 transitions, 940 flow [2024-11-20 09:44:16,337 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=709, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=940, PETRI_PLACES=78, PETRI_TRANSITIONS=97} [2024-11-20 09:44:16,338 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 34 predicate places. [2024-11-20 09:44:16,338 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 97 transitions, 940 flow [2024-11-20 09:44:16,338 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 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) [2024-11-20 09:44:16,338 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:44:16,338 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:44:16,338 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-20 09:44:16,339 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-20 09:44:16,339 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:44:16,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1829799521, now seen corresponding path program 3 times [2024-11-20 09:44:16,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:44:16,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471036974] [2024-11-20 09:44:16,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:16,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:44:16,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:16,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:44:16,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:44:16,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471036974] [2024-11-20 09:44:16,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471036974] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:44:16,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862952626] [2024-11-20 09:44:16,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 09:44:16,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:44:16,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:44:16,471 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) [2024-11-20 09:44:16,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-20 09:44:16,533 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-20 09:44:16,533 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:44:16,535 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 09:44:16,536 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:44:16,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:44:16,597 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:44:16,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:44:16,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862952626] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:44:16,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:44:16,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2024-11-20 09:44:16,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621167573] [2024-11-20 09:44:16,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:44:16,674 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-20 09:44:16,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:44:16,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-20 09:44:16,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-11-20 09:44:16,692 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-20 09:44:16,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 97 transitions, 940 flow. Second operand has 9 states, 9 states have (on average 12.11111111111111) internal successors, (109), 9 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:44:16,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:44:16,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-20 09:44:16,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:44:20,891 INFO L124 PetriNetUnfolderBase]: 36553/49922 cut-off events. [2024-11-20 09:44:20,892 INFO L125 PetriNetUnfolderBase]: For 276233/276267 co-relation queries the response was YES. [2024-11-20 09:44:21,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230047 conditions, 49922 events. 36553/49922 cut-off events. For 276233/276267 co-relation queries the response was YES. Maximal size of possible extension queue 1836. Compared 301182 event pairs, 7282 based on Foata normal form. 1015/50066 useless extension candidates. Maximal degree in co-relation 154521. Up to 17366 conditions per place. [2024-11-20 09:44:21,315 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 207 selfloop transitions, 76 changer transitions 1/289 dead transitions. [2024-11-20 09:44:21,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 289 transitions, 3343 flow [2024-11-20 09:44:21,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 09:44:21,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 09:44:21,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-11-20 09:44:21,317 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-11-20 09:44:21,317 INFO L175 Difference]: Start difference. First operand has 78 places, 97 transitions, 940 flow. Second operand 7 states and 172 transitions. [2024-11-20 09:44:21,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 289 transitions, 3343 flow [2024-11-20 09:44:22,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 289 transitions, 3224 flow, removed 37 selfloop flow, removed 1 redundant places. [2024-11-20 09:44:22,162 INFO L231 Difference]: Finished difference. Result has 88 places, 156 transitions, 2027 flow [2024-11-20 09:44:22,163 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=854, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2027, PETRI_PLACES=88, PETRI_TRANSITIONS=156} [2024-11-20 09:44:22,164 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 44 predicate places. [2024-11-20 09:44:22,165 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 156 transitions, 2027 flow [2024-11-20 09:44:22,165 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.11111111111111) internal successors, (109), 9 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:44:22,166 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:44:22,166 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:44:22,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-20 09:44:22,369 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,SelfDestructingSolverStorable8 [2024-11-20 09:44:22,370 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-20 09:44:22,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:44:22,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1451895657, now seen corresponding path program 4 times [2024-11-20 09:44:22,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:44:22,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092540692] [2024-11-20 09:44:22,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:22,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:44:22,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:22,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:44:22,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:44:22,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092540692] [2024-11-20 09:44:22,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092540692] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:44:22,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:44:22,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 09:44:22,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501864362] [2024-11-20 09:44:22,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:44:22,488 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 09:44:22,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:44:22,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 09:44:22,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 09:44:22,493 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-20 09:44:22,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 156 transitions, 2027 flow. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 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) [2024-11-20 09:44:22,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:44:22,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-20 09:44:22,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:44:27,110 INFO L124 PetriNetUnfolderBase]: 36999/50104 cut-off events. [2024-11-20 09:44:27,111 INFO L125 PetriNetUnfolderBase]: For 394247/394301 co-relation queries the response was YES. [2024-11-20 09:44:27,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256786 conditions, 50104 events. 36999/50104 cut-off events. For 394247/394301 co-relation queries the response was YES. Maximal size of possible extension queue 1758. Compared 294798 event pairs, 11919 based on Foata normal form. 104/48986 useless extension candidates. Maximal degree in co-relation 180710. Up to 24662 conditions per place. [2024-11-20 09:44:27,557 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 175 selfloop transitions, 7 changer transitions 17/204 dead transitions. [2024-11-20 09:44:27,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 204 transitions, 2782 flow [2024-11-20 09:44:27,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 09:44:27,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 09:44:27,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 108 transitions. [2024-11-20 09:44:27,559 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.54 [2024-11-20 09:44:27,559 INFO L175 Difference]: Start difference. First operand has 88 places, 156 transitions, 2027 flow. Second operand 5 states and 108 transitions. [2024-11-20 09:44:27,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 204 transitions, 2782 flow [2024-11-20 09:44:29,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 204 transitions, 2654 flow, removed 64 selfloop flow, removed 2 redundant places. [2024-11-20 09:44:29,483 INFO L231 Difference]: Finished difference. Result has 91 places, 154 transitions, 1937 flow [2024-11-20 09:44:29,483 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1899, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1937, PETRI_PLACES=91, PETRI_TRANSITIONS=154} [2024-11-20 09:44:29,484 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 47 predicate places. [2024-11-20 09:44:29,484 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 154 transitions, 1937 flow [2024-11-20 09:44:29,484 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 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) [2024-11-20 09:44:29,484 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:44:29,484 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:44:29,484 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-20 09:44:29,485 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-20 09:44:29,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:44:29,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1372284545, now seen corresponding path program 1 times [2024-11-20 09:44:29,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:44:29,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469380879] [2024-11-20 09:44:29,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:29,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:44:29,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:29,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:44:29,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:44:29,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469380879] [2024-11-20 09:44:29,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469380879] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:44:29,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:44:29,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 09:44:29,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838655817] [2024-11-20 09:44:29,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:44:29,600 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 09:44:29,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:44:29,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 09:44:29,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-20 09:44:29,610 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-20 09:44:29,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 154 transitions, 1937 flow. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 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) [2024-11-20 09:44:29,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:44:29,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-20 09:44:29,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:44:35,076 INFO L124 PetriNetUnfolderBase]: 47704/63921 cut-off events. [2024-11-20 09:44:35,076 INFO L125 PetriNetUnfolderBase]: For 521446/521514 co-relation queries the response was YES. [2024-11-20 09:44:35,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 330840 conditions, 63921 events. 47704/63921 cut-off events. For 521446/521514 co-relation queries the response was YES. Maximal size of possible extension queue 2354. Compared 381364 event pairs, 11903 based on Foata normal form. 722/62918 useless extension candidates. Maximal degree in co-relation 258682. Up to 28686 conditions per place. [2024-11-20 09:44:36,098 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 160 selfloop transitions, 113 changer transitions 0/278 dead transitions. [2024-11-20 09:44:36,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 278 transitions, 3818 flow [2024-11-20 09:44:36,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 09:44:36,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 09:44:36,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-11-20 09:44:36,099 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.64 [2024-11-20 09:44:36,099 INFO L175 Difference]: Start difference. First operand has 91 places, 154 transitions, 1937 flow. Second operand 5 states and 128 transitions. [2024-11-20 09:44:36,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 278 transitions, 3818 flow [2024-11-20 09:44:38,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 278 transitions, 3698 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-11-20 09:44:38,718 INFO L231 Difference]: Finished difference. Result has 90 places, 188 transitions, 2772 flow [2024-11-20 09:44:38,718 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1853, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2772, PETRI_PLACES=90, PETRI_TRANSITIONS=188} [2024-11-20 09:44:38,719 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 46 predicate places. [2024-11-20 09:44:38,719 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 188 transitions, 2772 flow [2024-11-20 09:44:38,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 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) [2024-11-20 09:44:38,719 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:44:38,719 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:44:38,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-20 09:44:38,719 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-20 09:44:38,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:44:38,720 INFO L85 PathProgramCache]: Analyzing trace with hash 2115531539, now seen corresponding path program 2 times [2024-11-20 09:44:38,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:44:38,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882967331] [2024-11-20 09:44:38,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:44:38,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:44:38,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:44:39,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:44:39,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:44:39,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882967331] [2024-11-20 09:44:39,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882967331] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:44:39,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075066908] [2024-11-20 09:44:39,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 09:44:39,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:44:39,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:44:39,054 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) [2024-11-20 09:44:39,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-20 09:44:39,125 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:44:39,125 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:44:39,127 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 09:44:39,128 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:44:39,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:44:39,178 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:44:39,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:44:39,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075066908] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 09:44:39,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 09:44:39,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 7 [2024-11-20 09:44:39,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373610141] [2024-11-20 09:44:39,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:44:39,243 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 09:44:39,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:44:39,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 09:44:39,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-20 09:44:39,252 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-20 09:44:39,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 188 transitions, 2772 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 09:44:39,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:44:39,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-20 09:44:39,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand