./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-simple-queue.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-simple-queue.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 608e0c2870f111f9f6921442a1f1a544ee956a8de04c7629c0edf3e54cde4da3 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 14:43:36,893 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 14:43:36,944 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-14 14:43:36,949 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 14:43:36,950 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 14:43:36,973 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 14:43:36,974 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 14:43:36,974 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 14:43:36,975 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 14:43:36,976 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 14:43:36,977 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 14:43:36,977 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 14:43:36,977 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 14:43:36,977 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 14:43:36,978 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 14:43:36,978 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 14:43:36,978 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-14 14:43:36,978 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 14:43:36,979 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 14:43:36,979 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 14:43:36,979 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 14:43:36,982 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-14 14:43:36,983 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 14:43:36,983 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-14 14:43:36,983 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 14:43:36,983 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 14:43:36,983 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-14 14:43:36,983 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 14:43:36,984 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 14:43:36,984 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 14:43:36,984 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 14:43:36,984 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 14:43:36,984 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 14:43:36,984 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 14:43:36,984 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 14:43:36,985 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-14 14:43:36,985 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 14:43:36,985 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 14:43:36,985 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 14:43:36,985 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 14:43:36,985 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 14:43:36,986 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 14:43:36,986 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 608e0c2870f111f9f6921442a1f1a544ee956a8de04c7629c0edf3e54cde4da3 [2024-10-14 14:43:37,184 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 14:43:37,204 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 14:43:37,206 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 14:43:37,207 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 14:43:37,207 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 14:43:37,208 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c [2024-10-14 14:43:38,570 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 14:43:38,759 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 14:43:38,759 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c [2024-10-14 14:43:38,774 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68dbe0bef/f2847379014f40c78a6ab0537d3cd87c/FLAG6b3b201b5 [2024-10-14 14:43:38,790 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68dbe0bef/f2847379014f40c78a6ab0537d3cd87c [2024-10-14 14:43:38,793 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 14:43:38,795 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 14:43:38,798 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 14:43:38,799 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 14:43:38,805 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 14:43:38,805 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:43:38" (1/1) ... [2024-10-14 14:43:38,806 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@454daad6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:43:38, skipping insertion in model container [2024-10-14 14:43:38,806 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:43:38" (1/1) ... [2024-10-14 14:43:38,830 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 14:43:39,020 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c[2464,2477] [2024-10-14 14:43:39,029 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 14:43:39,040 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 14:43:39,058 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-simple-queue.wvr.c[2464,2477] [2024-10-14 14:43:39,065 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 14:43:39,082 INFO L204 MainTranslator]: Completed translation [2024-10-14 14:43:39,082 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:43:39 WrapperNode [2024-10-14 14:43:39,082 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 14:43:39,084 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 14:43:39,084 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 14:43:39,084 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 14:43:39,090 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:43:39" (1/1) ... [2024-10-14 14:43:39,097 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:43:39" (1/1) ... [2024-10-14 14:43:39,118 INFO L138 Inliner]: procedures = 23, calls = 23, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 125 [2024-10-14 14:43:39,120 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 14:43:39,120 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 14:43:39,121 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 14:43:39,121 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 14:43:39,129 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:43:39" (1/1) ... [2024-10-14 14:43:39,130 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:43:39" (1/1) ... [2024-10-14 14:43:39,132 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:43:39" (1/1) ... [2024-10-14 14:43:39,155 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-10-14 14:43:39,155 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:43:39" (1/1) ... [2024-10-14 14:43:39,156 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:43:39" (1/1) ... [2024-10-14 14:43:39,165 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:43:39" (1/1) ... [2024-10-14 14:43:39,171 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:43:39" (1/1) ... [2024-10-14 14:43:39,172 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:43:39" (1/1) ... [2024-10-14 14:43:39,173 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:43:39" (1/1) ... [2024-10-14 14:43:39,175 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 14:43:39,179 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 14:43:39,180 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 14:43:39,180 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 14:43:39,181 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:43:39" (1/1) ... [2024-10-14 14:43:39,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 14:43:39,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:43:39,212 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-14 14:43:39,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-14 14:43:39,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 14:43:39,261 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-14 14:43:39,261 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-14 14:43:39,261 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-14 14:43:39,261 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-14 14:43:39,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-14 14:43:39,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-14 14:43:39,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-14 14:43:39,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-14 14:43:39,262 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-14 14:43:39,262 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-14 14:43:39,262 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-14 14:43:39,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 14:43:39,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 14:43:39,262 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-14 14:43:39,263 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-14 14:43:39,264 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-14 14:43:39,347 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 14:43:39,353 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 14:43:39,595 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-14 14:43:39,595 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 14:43:39,756 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 14:43:39,756 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-14 14:43:39,757 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:43:39 BoogieIcfgContainer [2024-10-14 14:43:39,757 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 14:43:39,759 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 14:43:39,759 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 14:43:39,761 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 14:43:39,761 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 02:43:38" (1/3) ... [2024-10-14 14:43:39,762 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19d6b5f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:43:39, skipping insertion in model container [2024-10-14 14:43:39,762 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:43:39" (2/3) ... [2024-10-14 14:43:39,762 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19d6b5f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:43:39, skipping insertion in model container [2024-10-14 14:43:39,762 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:43:39" (3/3) ... [2024-10-14 14:43:39,763 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-queue.wvr.c [2024-10-14 14:43:39,775 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 14:43:39,775 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-14 14:43:39,775 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-14 14:43:39,811 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-14 14:43:39,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 30 places, 28 transitions, 70 flow [2024-10-14 14:43:39,880 INFO L124 PetriNetUnfolderBase]: 5/26 cut-off events. [2024-10-14 14:43:39,881 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-14 14:43:39,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 26 events. 5/26 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 28 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 19. Up to 2 conditions per place. [2024-10-14 14:43:39,885 INFO L82 GeneralOperation]: Start removeDead. Operand has 30 places, 28 transitions, 70 flow [2024-10-14 14:43:39,888 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 25 transitions, 62 flow [2024-10-14 14:43:39,900 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 14:43:39,908 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;@239941ed, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 14:43:39,908 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-10-14 14:43:39,922 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 14:43:39,922 INFO L124 PetriNetUnfolderBase]: 5/24 cut-off events. [2024-10-14 14:43:39,923 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-14 14:43:39,924 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:43:39,924 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:43:39,929 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:43:39,934 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:43:39,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1302421153, now seen corresponding path program 1 times [2024-10-14 14:43:39,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:43:39,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645849122] [2024-10-14 14:43:39,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:43:39,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:43:40,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:43:40,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:40,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:43:40,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645849122] [2024-10-14 14:43:40,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645849122] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:43:40,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:43:40,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 14:43:40,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877306039] [2024-10-14 14:43:40,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:43:40,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-14 14:43:40,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:43:40,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-14 14:43:40,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-14 14:43:40,143 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-14 14:43:40,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 25 transitions, 62 flow. Second operand has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:40,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:43:40,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-14 14:43:40,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:43:40,302 INFO L124 PetriNetUnfolderBase]: 122/217 cut-off events. [2024-10-14 14:43:40,303 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-10-14 14:43:40,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 455 conditions, 217 events. 122/217 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 711 event pairs, 94 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 405. Up to 214 conditions per place. [2024-10-14 14:43:40,306 INFO L140 encePairwiseOnDemand]: 26/28 looper letters, 20 selfloop transitions, 0 changer transitions 0/23 dead transitions. [2024-10-14 14:43:40,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 23 transitions, 98 flow [2024-10-14 14:43:40,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-14 14:43:40,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-14 14:43:40,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 32 transitions. [2024-10-14 14:43:40,314 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-10-14 14:43:40,316 INFO L175 Difference]: Start difference. First operand has 27 places, 25 transitions, 62 flow. Second operand 2 states and 32 transitions. [2024-10-14 14:43:40,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 23 transitions, 98 flow [2024-10-14 14:43:40,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 23 transitions, 90 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-14 14:43:40,321 INFO L231 Difference]: Finished difference. Result has 24 places, 23 transitions, 50 flow [2024-10-14 14:43:40,322 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=50, PETRI_PLACES=24, PETRI_TRANSITIONS=23} [2024-10-14 14:43:40,324 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, -3 predicate places. [2024-10-14 14:43:40,324 INFO L471 AbstractCegarLoop]: Abstraction has has 24 places, 23 transitions, 50 flow [2024-10-14 14:43:40,325 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:40,325 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:43:40,325 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:43:40,325 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 14:43:40,329 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:43:40,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:43:40,330 INFO L85 PathProgramCache]: Analyzing trace with hash -406957548, now seen corresponding path program 1 times [2024-10-14 14:43:40,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:43:40,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327439540] [2024-10-14 14:43:40,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:43:40,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:43:40,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:43:40,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:40,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:43:40,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327439540] [2024-10-14 14:43:40,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327439540] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:43:40,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:43:40,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 14:43:40,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073144107] [2024-10-14 14:43:40,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:43:40,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 14:43:40,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:43:40,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 14:43:40,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 14:43:40,487 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-14 14:43:40,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 23 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:40,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:43:40,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-14 14:43:40,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:43:40,564 INFO L124 PetriNetUnfolderBase]: 203/353 cut-off events. [2024-10-14 14:43:40,565 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-10-14 14:43:40,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 712 conditions, 353 events. 203/353 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1259 event pairs, 82 based on Foata normal form. 1/301 useless extension candidates. Maximal degree in co-relation 709. Up to 176 conditions per place. [2024-10-14 14:43:40,568 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 28 selfloop transitions, 2 changer transitions 3/36 dead transitions. [2024-10-14 14:43:40,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 36 transitions, 144 flow [2024-10-14 14:43:40,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 14:43:40,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 14:43:40,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 49 transitions. [2024-10-14 14:43:40,569 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-10-14 14:43:40,569 INFO L175 Difference]: Start difference. First operand has 24 places, 23 transitions, 50 flow. Second operand 3 states and 49 transitions. [2024-10-14 14:43:40,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 36 transitions, 144 flow [2024-10-14 14:43:40,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 36 transitions, 144 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-14 14:43:40,571 INFO L231 Difference]: Finished difference. Result has 27 places, 24 transitions, 62 flow [2024-10-14 14:43:40,571 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=27, PETRI_TRANSITIONS=24} [2024-10-14 14:43:40,572 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 0 predicate places. [2024-10-14 14:43:40,572 INFO L471 AbstractCegarLoop]: Abstraction has has 27 places, 24 transitions, 62 flow [2024-10-14 14:43:40,572 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:40,572 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:43:40,573 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:43:40,573 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-14 14:43:40,573 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:43:40,573 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:43:40,573 INFO L85 PathProgramCache]: Analyzing trace with hash -132930614, now seen corresponding path program 1 times [2024-10-14 14:43:40,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:43:40,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018007644] [2024-10-14 14:43:40,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:43:40,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:43:40,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:43:40,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:40,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:43:40,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018007644] [2024-10-14 14:43:40,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018007644] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:43:40,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:43:40,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 14:43:40,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36300640] [2024-10-14 14:43:40,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:43:40,683 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 14:43:40,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:43:40,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 14:43:40,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 14:43:40,684 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-14 14:43:40,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:40,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:43:40,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-14 14:43:40,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:43:40,797 INFO L124 PetriNetUnfolderBase]: 251/446 cut-off events. [2024-10-14 14:43:40,797 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-10-14 14:43:40,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 939 conditions, 446 events. 251/446 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1673 event pairs, 113 based on Foata normal form. 11/385 useless extension candidates. Maximal degree in co-relation 934. Up to 306 conditions per place. [2024-10-14 14:43:40,801 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 27 selfloop transitions, 2 changer transitions 6/38 dead transitions. [2024-10-14 14:43:40,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 38 transitions, 163 flow [2024-10-14 14:43:40,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 14:43:40,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 14:43:40,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2024-10-14 14:43:40,804 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-10-14 14:43:40,805 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 62 flow. Second operand 3 states and 50 transitions. [2024-10-14 14:43:40,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 38 transitions, 163 flow [2024-10-14 14:43:40,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 38 transitions, 161 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 14:43:40,806 INFO L231 Difference]: Finished difference. Result has 29 places, 25 transitions, 72 flow [2024-10-14 14:43:40,806 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=29, PETRI_TRANSITIONS=25} [2024-10-14 14:43:40,807 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2024-10-14 14:43:40,807 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 25 transitions, 72 flow [2024-10-14 14:43:40,807 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:40,808 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:43:40,809 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:43:40,809 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-14 14:43:40,809 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:43:40,809 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:43:40,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1274929099, now seen corresponding path program 1 times [2024-10-14 14:43:40,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:43:40,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908671782] [2024-10-14 14:43:40,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:43:40,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:43:40,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:43:40,988 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:40,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:43:40,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908671782] [2024-10-14 14:43:40,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908671782] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:43:40,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:43:40,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 14:43:40,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596082262] [2024-10-14 14:43:40,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:43:40,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 14:43:40,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:43:40,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 14:43:40,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 14:43:40,993 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-14 14:43:40,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 72 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:40,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:43:40,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-14 14:43:40,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:43:41,096 INFO L124 PetriNetUnfolderBase]: 319/585 cut-off events. [2024-10-14 14:43:41,097 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2024-10-14 14:43:41,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1268 conditions, 585 events. 319/585 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 2454 event pairs, 285 based on Foata normal form. 12/501 useless extension candidates. Maximal degree in co-relation 1262. Up to 443 conditions per place. [2024-10-14 14:43:41,102 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 21 selfloop transitions, 2 changer transitions 15/41 dead transitions. [2024-10-14 14:43:41,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 41 transitions, 184 flow [2024-10-14 14:43:41,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 14:43:41,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 14:43:41,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 57 transitions. [2024-10-14 14:43:41,105 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5089285714285714 [2024-10-14 14:43:41,105 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 72 flow. Second operand 4 states and 57 transitions. [2024-10-14 14:43:41,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 41 transitions, 184 flow [2024-10-14 14:43:41,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 41 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 14:43:41,106 INFO L231 Difference]: Finished difference. Result has 33 places, 26 transitions, 84 flow [2024-10-14 14:43:41,106 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=33, PETRI_TRANSITIONS=26} [2024-10-14 14:43:41,107 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 6 predicate places. [2024-10-14 14:43:41,109 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 26 transitions, 84 flow [2024-10-14 14:43:41,109 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:41,110 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:43:41,110 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:43:41,110 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-14 14:43:41,110 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:43:41,111 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:43:41,112 INFO L85 PathProgramCache]: Analyzing trace with hash 2016933381, now seen corresponding path program 1 times [2024-10-14 14:43:41,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:43:41,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250521581] [2024-10-14 14:43:41,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:43:41,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:43:41,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:43:41,525 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:41,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:43:41,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250521581] [2024-10-14 14:43:41,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250521581] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:43:41,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626980218] [2024-10-14 14:43:41,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:43:41,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:43:41,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:43:41,530 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:43:41,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-14 14:43:41,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:43:41,605 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-14 14:43:41,609 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:43:41,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:41,840 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:43:41,919 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-14 14:43:41,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2024-10-14 14:43:42,058 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:42,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626980218] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:43:42,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:43:42,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-10-14 14:43:42,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328052659] [2024-10-14 14:43:42,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:43:42,060 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-14 14:43:42,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:43:42,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-14 14:43:42,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2024-10-14 14:43:42,063 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-14 14:43:42,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 84 flow. Second operand has 15 states, 15 states have (on average 8.733333333333333) internal successors, (131), 15 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:42,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:43:42,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-14 14:43:42,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:43:42,572 INFO L124 PetriNetUnfolderBase]: 911/1594 cut-off events. [2024-10-14 14:43:42,573 INFO L125 PetriNetUnfolderBase]: For 228/228 co-relation queries the response was YES. [2024-10-14 14:43:42,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3502 conditions, 1594 events. 911/1594 cut-off events. For 228/228 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 7631 event pairs, 172 based on Foata normal form. 3/1350 useless extension candidates. Maximal degree in co-relation 3494. Up to 292 conditions per place. [2024-10-14 14:43:42,581 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 107 selfloop transitions, 16 changer transitions 27/153 dead transitions. [2024-10-14 14:43:42,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 153 transitions, 705 flow [2024-10-14 14:43:42,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-14 14:43:42,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-14 14:43:42,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 217 transitions. [2024-10-14 14:43:42,586 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5961538461538461 [2024-10-14 14:43:42,586 INFO L175 Difference]: Start difference. First operand has 33 places, 26 transitions, 84 flow. Second operand 13 states and 217 transitions. [2024-10-14 14:43:42,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 153 transitions, 705 flow [2024-10-14 14:43:42,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 153 transitions, 697 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-10-14 14:43:42,591 INFO L231 Difference]: Finished difference. Result has 48 places, 39 transitions, 206 flow [2024-10-14 14:43:42,592 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=206, PETRI_PLACES=48, PETRI_TRANSITIONS=39} [2024-10-14 14:43:42,595 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 21 predicate places. [2024-10-14 14:43:42,595 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 39 transitions, 206 flow [2024-10-14 14:43:42,596 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.733333333333333) internal successors, (131), 15 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:42,596 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:43:42,596 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:43:42,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-14 14:43:42,799 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:43:42,800 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:43:42,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:43:42,801 INFO L85 PathProgramCache]: Analyzing trace with hash -2052628911, now seen corresponding path program 2 times [2024-10-14 14:43:42,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:43:42,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810197125] [2024-10-14 14:43:42,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:43:42,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:43:42,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:43:42,873 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 14:43:42,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:43:42,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810197125] [2024-10-14 14:43:42,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810197125] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:43:42,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202534127] [2024-10-14 14:43:42,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 14:43:42,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:43:42,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:43:42,875 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:43:42,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-14 14:43:42,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 14:43:42,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:43:42,936 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-14 14:43:42,937 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:43:43,010 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 14:43:43,011 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:43:43,098 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 14:43:43,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202534127] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:43:43,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:43:43,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 10 [2024-10-14 14:43:43,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324222782] [2024-10-14 14:43:43,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:43:43,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-14 14:43:43,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:43:43,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-14 14:43:43,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-10-14 14:43:43,100 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-14 14:43:43,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 39 transitions, 206 flow. Second operand has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:43,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:43:43,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-14 14:43:43,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:43:43,347 INFO L124 PetriNetUnfolderBase]: 1097/1958 cut-off events. [2024-10-14 14:43:43,348 INFO L125 PetriNetUnfolderBase]: For 1580/1580 co-relation queries the response was YES. [2024-10-14 14:43:43,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4711 conditions, 1958 events. 1097/1958 cut-off events. For 1580/1580 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 9870 event pairs, 348 based on Foata normal form. 64/1710 useless extension candidates. Maximal degree in co-relation 4698. Up to 462 conditions per place. [2024-10-14 14:43:43,354 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 49 selfloop transitions, 9 changer transitions 68/129 dead transitions. [2024-10-14 14:43:43,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 129 transitions, 682 flow [2024-10-14 14:43:43,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-14 14:43:43,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-14 14:43:43,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 181 transitions. [2024-10-14 14:43:43,356 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5876623376623377 [2024-10-14 14:43:43,356 INFO L175 Difference]: Start difference. First operand has 48 places, 39 transitions, 206 flow. Second operand 11 states and 181 transitions. [2024-10-14 14:43:43,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 129 transitions, 682 flow [2024-10-14 14:43:43,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 129 transitions, 642 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-10-14 14:43:43,362 INFO L231 Difference]: Finished difference. Result has 54 places, 33 transitions, 183 flow [2024-10-14 14:43:43,362 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=183, PETRI_PLACES=54, PETRI_TRANSITIONS=33} [2024-10-14 14:43:43,363 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 27 predicate places. [2024-10-14 14:43:43,363 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 33 transitions, 183 flow [2024-10-14 14:43:43,363 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.454545454545455) internal successors, (104), 11 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:43,363 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:43:43,363 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:43:43,381 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-14 14:43:43,564 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,SelfDestructingSolverStorable5 [2024-10-14 14:43:43,565 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:43:43,565 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:43:43,565 INFO L85 PathProgramCache]: Analyzing trace with hash 178691706, now seen corresponding path program 3 times [2024-10-14 14:43:43,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:43:43,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97215691] [2024-10-14 14:43:43,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:43:43,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:43:43,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:43:44,072 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:44,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:43:44,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97215691] [2024-10-14 14:43:44,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97215691] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:43:44,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714650321] [2024-10-14 14:43:44,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 14:43:44,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:43:44,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:43:44,075 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:43:44,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-14 14:43:44,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-10-14 14:43:44,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:43:44,147 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-14 14:43:44,149 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:43:44,296 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:44,297 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:43:44,347 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-14 14:43:44,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2024-10-14 14:43:44,488 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:44,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714650321] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:43:44,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:43:44,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2024-10-14 14:43:44,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913249268] [2024-10-14 14:43:44,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:43:44,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-14 14:43:44,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:43:44,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-14 14:43:44,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2024-10-14 14:43:44,491 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-14 14:43:44,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 33 transitions, 183 flow. Second operand has 21 states, 21 states have (on average 7.857142857142857) internal successors, (165), 21 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:44,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:43:44,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-14 14:43:44,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:43:45,388 INFO L124 PetriNetUnfolderBase]: 1387/2475 cut-off events. [2024-10-14 14:43:45,388 INFO L125 PetriNetUnfolderBase]: For 2671/2671 co-relation queries the response was YES. [2024-10-14 14:43:45,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6227 conditions, 2475 events. 1387/2475 cut-off events. For 2671/2671 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 13075 event pairs, 224 based on Foata normal form. 52/2131 useless extension candidates. Maximal degree in co-relation 6212. Up to 450 conditions per place. [2024-10-14 14:43:45,397 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 92 selfloop transitions, 15 changer transitions 82/192 dead transitions. [2024-10-14 14:43:45,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 192 transitions, 1050 flow [2024-10-14 14:43:45,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-14 14:43:45,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-10-14 14:43:45,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 278 transitions. [2024-10-14 14:43:45,399 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5515873015873016 [2024-10-14 14:43:45,399 INFO L175 Difference]: Start difference. First operand has 54 places, 33 transitions, 183 flow. Second operand 18 states and 278 transitions. [2024-10-14 14:43:45,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 192 transitions, 1050 flow [2024-10-14 14:43:45,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 192 transitions, 982 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-10-14 14:43:45,409 INFO L231 Difference]: Finished difference. Result has 65 places, 39 transitions, 264 flow [2024-10-14 14:43:45,409 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=264, PETRI_PLACES=65, PETRI_TRANSITIONS=39} [2024-10-14 14:43:45,410 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 38 predicate places. [2024-10-14 14:43:45,410 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 39 transitions, 264 flow [2024-10-14 14:43:45,411 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.857142857142857) internal successors, (165), 21 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:45,411 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:43:45,411 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:43:45,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-14 14:43:45,616 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:43:45,617 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:43:45,617 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:43:45,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1647887852, now seen corresponding path program 4 times [2024-10-14 14:43:45,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:43:45,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379673321] [2024-10-14 14:43:45,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:43:45,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:43:45,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:43:45,981 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:45,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:43:45,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379673321] [2024-10-14 14:43:45,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379673321] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:43:45,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611136190] [2024-10-14 14:43:45,982 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 14:43:45,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:43:45,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:43:45,984 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:43:45,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-14 14:43:46,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 14:43:46,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:43:46,046 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-10-14 14:43:46,047 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:43:46,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-10-14 14:43:46,340 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-14 14:43:46,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2024-10-14 14:43:46,352 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:46,352 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:43:46,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2024-10-14 14:43:46,696 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-10-14 14:43:46,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 43 [2024-10-14 14:43:46,786 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:46,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611136190] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:43:46,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:43:46,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-10-14 14:43:46,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298112072] [2024-10-14 14:43:46,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:43:46,787 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-14 14:43:46,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:43:46,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-14 14:43:46,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2024-10-14 14:43:46,788 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-14 14:43:46,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 39 transitions, 264 flow. Second operand has 24 states, 24 states have (on average 8.208333333333334) internal successors, (197), 24 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:46,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:43:46,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-14 14:43:46,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:43:47,409 INFO L124 PetriNetUnfolderBase]: 1097/1959 cut-off events. [2024-10-14 14:43:47,409 INFO L125 PetriNetUnfolderBase]: For 2220/2220 co-relation queries the response was YES. [2024-10-14 14:43:47,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5051 conditions, 1959 events. 1097/1959 cut-off events. For 2220/2220 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 9925 event pairs, 427 based on Foata normal form. 1/1649 useless extension candidates. Maximal degree in co-relation 5030. Up to 820 conditions per place. [2024-10-14 14:43:47,417 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 35 selfloop transitions, 6 changer transitions 71/115 dead transitions. [2024-10-14 14:43:47,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 115 transitions, 683 flow [2024-10-14 14:43:47,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-14 14:43:47,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-14 14:43:47,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 160 transitions. [2024-10-14 14:43:47,418 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5194805194805194 [2024-10-14 14:43:47,418 INFO L175 Difference]: Start difference. First operand has 65 places, 39 transitions, 264 flow. Second operand 11 states and 160 transitions. [2024-10-14 14:43:47,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 115 transitions, 683 flow [2024-10-14 14:43:47,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 115 transitions, 628 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-10-14 14:43:47,423 INFO L231 Difference]: Finished difference. Result has 62 places, 34 transitions, 189 flow [2024-10-14 14:43:47,423 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=189, PETRI_PLACES=62, PETRI_TRANSITIONS=34} [2024-10-14 14:43:47,424 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 35 predicate places. [2024-10-14 14:43:47,424 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 34 transitions, 189 flow [2024-10-14 14:43:47,424 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 8.208333333333334) internal successors, (197), 24 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:47,424 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:43:47,424 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:43:47,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-14 14:43:47,628 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:43:47,628 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:43:47,629 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:43:47,629 INFO L85 PathProgramCache]: Analyzing trace with hash 2122792042, now seen corresponding path program 5 times [2024-10-14 14:43:47,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:43:47,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145756944] [2024-10-14 14:43:47,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:43:47,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:43:47,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:43:48,207 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:48,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:43:48,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145756944] [2024-10-14 14:43:48,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145756944] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:43:48,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321202591] [2024-10-14 14:43:48,208 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-14 14:43:48,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:43:48,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:43:48,210 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:43:48,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-14 14:43:48,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-10-14 14:43:48,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:43:48,275 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-14 14:43:48,277 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:43:48,377 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:43:48,377 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:43:48,399 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-10-14 14:43:48,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2024-10-14 14:43:48,422 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 14:43:48,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321202591] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:43:48,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:43:48,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 6] total 16 [2024-10-14 14:43:48,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672507971] [2024-10-14 14:43:48,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:43:48,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-14 14:43:48,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:43:48,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-14 14:43:48,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2024-10-14 14:43:48,424 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-14 14:43:48,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 34 transitions, 189 flow. Second operand has 17 states, 17 states have (on average 8.294117647058824) internal successors, (141), 17 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:48,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:43:48,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-14 14:43:48,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:43:49,013 INFO L124 PetriNetUnfolderBase]: 1379/2406 cut-off events. [2024-10-14 14:43:49,013 INFO L125 PetriNetUnfolderBase]: For 2431/2431 co-relation queries the response was YES. [2024-10-14 14:43:49,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6203 conditions, 2406 events. 1379/2406 cut-off events. For 2431/2431 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 11961 event pairs, 208 based on Foata normal form. 5/2038 useless extension candidates. Maximal degree in co-relation 6185. Up to 427 conditions per place. [2024-10-14 14:43:49,023 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 95 selfloop transitions, 23 changer transitions 39/160 dead transitions. [2024-10-14 14:43:49,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 160 transitions, 907 flow [2024-10-14 14:43:49,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-14 14:43:49,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-10-14 14:43:49,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 231 transitions. [2024-10-14 14:43:49,025 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-10-14 14:43:49,026 INFO L175 Difference]: Start difference. First operand has 62 places, 34 transitions, 189 flow. Second operand 15 states and 231 transitions. [2024-10-14 14:43:49,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 160 transitions, 907 flow [2024-10-14 14:43:49,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 160 transitions, 873 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-10-14 14:43:49,034 INFO L231 Difference]: Finished difference. Result has 64 places, 45 transitions, 366 flow [2024-10-14 14:43:49,035 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=366, PETRI_PLACES=64, PETRI_TRANSITIONS=45} [2024-10-14 14:43:49,035 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 37 predicate places. [2024-10-14 14:43:49,036 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 45 transitions, 366 flow [2024-10-14 14:43:49,036 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 8.294117647058824) internal successors, (141), 17 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:49,036 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:43:49,036 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:43:49,049 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-14 14:43:49,237 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:43:49,238 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:43:49,238 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:43:49,238 INFO L85 PathProgramCache]: Analyzing trace with hash 898550012, now seen corresponding path program 6 times [2024-10-14 14:43:49,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:43:49,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949025585] [2024-10-14 14:43:49,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:43:49,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:43:49,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:43:49,342 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-14 14:43:49,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:43:49,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949025585] [2024-10-14 14:43:49,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949025585] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:43:49,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370088706] [2024-10-14 14:43:49,343 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-14 14:43:49,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:43:49,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:43:49,345 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:43:49,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-14 14:43:49,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-10-14 14:43:49,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:43:49,419 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-14 14:43:49,421 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:43:49,454 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-14 14:43:49,455 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:43:49,573 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 14:43:49,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370088706] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:43:49,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:43:49,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6] total 9 [2024-10-14 14:43:49,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767328008] [2024-10-14 14:43:49,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:43:49,574 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 14:43:49,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:43:49,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 14:43:49,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-10-14 14:43:49,574 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-14 14:43:49,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 45 transitions, 366 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:49,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:43:49,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-14 14:43:49,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:43:49,941 INFO L124 PetriNetUnfolderBase]: 2657/4606 cut-off events. [2024-10-14 14:43:49,941 INFO L125 PetriNetUnfolderBase]: For 7265/7265 co-relation queries the response was YES. [2024-10-14 14:43:49,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12294 conditions, 4606 events. 2657/4606 cut-off events. For 7265/7265 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 25707 event pairs, 713 based on Foata normal form. 22/3911 useless extension candidates. Maximal degree in co-relation 12273. Up to 1360 conditions per place. [2024-10-14 14:43:49,958 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 74 selfloop transitions, 27 changer transitions 0/104 dead transitions. [2024-10-14 14:43:49,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 104 transitions, 922 flow [2024-10-14 14:43:49,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 14:43:49,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 14:43:49,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-10-14 14:43:49,959 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6642857142857143 [2024-10-14 14:43:49,959 INFO L175 Difference]: Start difference. First operand has 64 places, 45 transitions, 366 flow. Second operand 5 states and 93 transitions. [2024-10-14 14:43:49,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 104 transitions, 922 flow [2024-10-14 14:43:49,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 104 transitions, 762 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-10-14 14:43:49,966 INFO L231 Difference]: Finished difference. Result has 62 places, 62 transitions, 512 flow [2024-10-14 14:43:49,966 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=512, PETRI_PLACES=62, PETRI_TRANSITIONS=62} [2024-10-14 14:43:49,967 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 35 predicate places. [2024-10-14 14:43:49,967 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 62 transitions, 512 flow [2024-10-14 14:43:49,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:49,967 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:43:49,967 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:43:49,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-14 14:43:50,168 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:43:50,168 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:43:50,169 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:43:50,169 INFO L85 PathProgramCache]: Analyzing trace with hash -846417175, now seen corresponding path program 7 times [2024-10-14 14:43:50,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:43:50,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594840629] [2024-10-14 14:43:50,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:43:50,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:43:50,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:43:50,773 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:50,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:43:50,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594840629] [2024-10-14 14:43:50,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594840629] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:43:50,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678906391] [2024-10-14 14:43:50,773 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-14 14:43:50,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:43:50,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:43:50,775 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:43:50,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-14 14:43:50,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:43:50,842 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-14 14:43:50,844 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:43:51,171 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-14 14:43:51,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2024-10-14 14:43:51,187 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:51,188 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:43:51,224 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-14 14:43:51,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2024-10-14 14:43:51,674 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:51,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678906391] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:43:51,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:43:51,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2024-10-14 14:43:51,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062964046] [2024-10-14 14:43:51,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:43:51,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-14 14:43:51,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:43:51,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-14 14:43:51,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2024-10-14 14:43:51,676 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-14 14:43:51,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 62 transitions, 512 flow. Second operand has 33 states, 33 states have (on average 7.7272727272727275) internal successors, (255), 33 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:51,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:43:51,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-14 14:43:51,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:43:53,677 INFO L124 PetriNetUnfolderBase]: 5351/9326 cut-off events. [2024-10-14 14:43:53,677 INFO L125 PetriNetUnfolderBase]: For 11944/11944 co-relation queries the response was YES. [2024-10-14 14:43:53,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24316 conditions, 9326 events. 5351/9326 cut-off events. For 11944/11944 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 59374 event pairs, 561 based on Foata normal form. 129/7986 useless extension candidates. Maximal degree in co-relation 24295. Up to 1725 conditions per place. [2024-10-14 14:43:53,713 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 233 selfloop transitions, 78 changer transitions 69/383 dead transitions. [2024-10-14 14:43:53,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 383 transitions, 2477 flow [2024-10-14 14:43:53,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-10-14 14:43:53,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-10-14 14:43:53,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 499 transitions. [2024-10-14 14:43:53,715 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.594047619047619 [2024-10-14 14:43:53,715 INFO L175 Difference]: Start difference. First operand has 62 places, 62 transitions, 512 flow. Second operand 30 states and 499 transitions. [2024-10-14 14:43:53,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 383 transitions, 2477 flow [2024-10-14 14:43:53,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 383 transitions, 2363 flow, removed 57 selfloop flow, removed 0 redundant places. [2024-10-14 14:43:53,735 INFO L231 Difference]: Finished difference. Result has 105 places, 102 transitions, 1123 flow [2024-10-14 14:43:53,735 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1123, PETRI_PLACES=105, PETRI_TRANSITIONS=102} [2024-10-14 14:43:53,736 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 78 predicate places. [2024-10-14 14:43:53,736 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 102 transitions, 1123 flow [2024-10-14 14:43:53,736 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 7.7272727272727275) internal successors, (255), 33 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:53,736 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:43:53,736 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:43:53,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-14 14:43:53,940 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:43:53,941 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:43:53,942 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:43:53,942 INFO L85 PathProgramCache]: Analyzing trace with hash -591025093, now seen corresponding path program 8 times [2024-10-14 14:43:53,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:43:53,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610353632] [2024-10-14 14:43:53,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:43:53,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:43:53,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:43:54,527 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:54,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:43:54,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610353632] [2024-10-14 14:43:54,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610353632] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:43:54,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042977911] [2024-10-14 14:43:54,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 14:43:54,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:43:54,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:43:54,530 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:43:54,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-14 14:43:54,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 14:43:54,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:43:54,593 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-10-14 14:43:54,595 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:43:54,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-10-14 14:43:54,942 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2024-10-14 14:43:54,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2024-10-14 14:43:54,952 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:54,952 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:43:55,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2024-10-14 14:43:55,608 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-10-14 14:43:55,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 43 [2024-10-14 14:43:55,755 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:55,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042977911] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:43:55,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:43:55,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2024-10-14 14:43:55,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797565994] [2024-10-14 14:43:55,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:43:55,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-14 14:43:55,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:43:55,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-14 14:43:55,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2024-10-14 14:43:55,757 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-14 14:43:55,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 102 transitions, 1123 flow. Second operand has 33 states, 33 states have (on average 7.96969696969697) internal successors, (263), 33 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:55,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:43:55,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-14 14:43:55,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:43:58,327 INFO L124 PetriNetUnfolderBase]: 5132/8936 cut-off events. [2024-10-14 14:43:58,328 INFO L125 PetriNetUnfolderBase]: For 20993/20993 co-relation queries the response was YES. [2024-10-14 14:43:58,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24994 conditions, 8936 events. 5132/8936 cut-off events. For 20993/20993 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 57632 event pairs, 1814 based on Foata normal form. 2/7532 useless extension candidates. Maximal degree in co-relation 24958. Up to 4746 conditions per place. [2024-10-14 14:43:58,360 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 72 selfloop transitions, 10 changer transitions 198/283 dead transitions. [2024-10-14 14:43:58,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 283 transitions, 2163 flow [2024-10-14 14:43:58,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-14 14:43:58,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-14 14:43:58,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 337 transitions. [2024-10-14 14:43:58,363 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.547077922077922 [2024-10-14 14:43:58,363 INFO L175 Difference]: Start difference. First operand has 105 places, 102 transitions, 1123 flow. Second operand 22 states and 337 transitions. [2024-10-14 14:43:58,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 283 transitions, 2163 flow [2024-10-14 14:43:58,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 283 transitions, 2066 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-10-14 14:43:58,433 INFO L231 Difference]: Finished difference. Result has 123 places, 74 transitions, 735 flow [2024-10-14 14:43:58,433 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1027, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=735, PETRI_PLACES=123, PETRI_TRANSITIONS=74} [2024-10-14 14:43:58,435 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 96 predicate places. [2024-10-14 14:43:58,435 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 74 transitions, 735 flow [2024-10-14 14:43:58,435 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 7.96969696969697) internal successors, (263), 33 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:43:58,435 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:43:58,436 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:43:58,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-14 14:43:58,647 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-14 14:43:58,648 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:43:58,648 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:43:58,648 INFO L85 PathProgramCache]: Analyzing trace with hash -275602663, now seen corresponding path program 9 times [2024-10-14 14:43:58,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:43:58,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583650663] [2024-10-14 14:43:58,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:43:58,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:43:58,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:43:59,492 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:43:59,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:43:59,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583650663] [2024-10-14 14:43:59,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583650663] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:43:59,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783833117] [2024-10-14 14:43:59,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 14:43:59,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:43:59,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:43:59,494 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:43:59,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-14 14:43:59,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-10-14 14:43:59,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:43:59,619 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-10-14 14:43:59,621 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:43:59,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-10-14 14:43:59,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-10-14 14:43:59,964 INFO L349 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2024-10-14 14:43:59,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 13 [2024-10-14 14:43:59,971 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 14:43:59,971 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:44:00,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 77 [2024-10-14 14:44:00,666 INFO L349 Elim1Store]: treesize reduction 10, result has 47.4 percent of original size [2024-10-14 14:44:00,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 170 treesize of output 158 [2024-10-14 14:44:00,893 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 14:44:00,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783833117] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:44:00,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:44:00,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 33 [2024-10-14 14:44:00,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390272373] [2024-10-14 14:44:00,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:44:00,895 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-10-14 14:44:00,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:44:00,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-10-14 14:44:00,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=932, Unknown=0, NotChecked=0, Total=1122 [2024-10-14 14:44:00,896 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-14 14:44:00,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 74 transitions, 735 flow. Second operand has 34 states, 34 states have (on average 7.852941176470588) internal successors, (267), 34 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:44:00,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:44:00,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-14 14:44:00,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:44:05,687 INFO L124 PetriNetUnfolderBase]: 8936/15438 cut-off events. [2024-10-14 14:44:05,688 INFO L125 PetriNetUnfolderBase]: For 43119/43119 co-relation queries the response was YES. [2024-10-14 14:44:05,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43596 conditions, 15438 events. 8936/15438 cut-off events. For 43119/43119 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 107599 event pairs, 2674 based on Foata normal form. 105/13127 useless extension candidates. Maximal degree in co-relation 43556. Up to 4746 conditions per place. [2024-10-14 14:44:05,757 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 72 selfloop transitions, 9 changer transitions 424/508 dead transitions. [2024-10-14 14:44:05,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 508 transitions, 3980 flow [2024-10-14 14:44:05,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-10-14 14:44:05,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-10-14 14:44:05,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 579 transitions. [2024-10-14 14:44:05,761 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5908163265306122 [2024-10-14 14:44:05,761 INFO L175 Difference]: Start difference. First operand has 123 places, 74 transitions, 735 flow. Second operand 35 states and 579 transitions. [2024-10-14 14:44:05,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 508 transitions, 3980 flow [2024-10-14 14:44:06,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 508 transitions, 3430 flow, removed 152 selfloop flow, removed 19 redundant places. [2024-10-14 14:44:06,138 INFO L231 Difference]: Finished difference. Result has 137 places, 73 transitions, 737 flow [2024-10-14 14:44:06,138 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=603, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=737, PETRI_PLACES=137, PETRI_TRANSITIONS=73} [2024-10-14 14:44:06,139 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 110 predicate places. [2024-10-14 14:44:06,139 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 73 transitions, 737 flow [2024-10-14 14:44:06,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 7.852941176470588) internal successors, (267), 34 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:44:06,139 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:44:06,139 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:44:06,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-14 14:44:06,343 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-10-14 14:44:06,344 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:44:06,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:44:06,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1457377621, now seen corresponding path program 10 times [2024-10-14 14:44:06,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:44:06,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608743049] [2024-10-14 14:44:06,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:44:06,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:44:06,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:44:07,497 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:44:07,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:44:07,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608743049] [2024-10-14 14:44:07,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608743049] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:44:07,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89756589] [2024-10-14 14:44:07,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 14:44:07,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:44:07,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:44:07,500 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:44:07,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-14 14:44:07,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 14:44:07,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:44:07,578 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-14 14:44:07,579 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:44:07,772 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 14:44:07,772 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:44:07,797 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-10-14 14:44:07,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2024-10-14 14:44:07,822 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-14 14:44:07,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89756589] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:44:07,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:44:07,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 8] total 23 [2024-10-14 14:44:07,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705324980] [2024-10-14 14:44:07,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:44:07,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-14 14:44:07,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:44:07,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-14 14:44:07,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2024-10-14 14:44:07,825 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-14 14:44:07,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 73 transitions, 737 flow. Second operand has 24 states, 24 states have (on average 7.958333333333333) internal successors, (191), 24 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:44:07,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:44:07,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-14 14:44:07,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:44:09,398 INFO L124 PetriNetUnfolderBase]: 5286/9079 cut-off events. [2024-10-14 14:44:09,398 INFO L125 PetriNetUnfolderBase]: For 51419/51419 co-relation queries the response was YES. [2024-10-14 14:44:09,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28636 conditions, 9079 events. 5286/9079 cut-off events. For 51419/51419 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 56008 event pairs, 604 based on Foata normal form. 15/7688 useless extension candidates. Maximal degree in co-relation 28580. Up to 1650 conditions per place. [2024-10-14 14:44:09,586 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 127 selfloop transitions, 86 changer transitions 57/273 dead transitions. [2024-10-14 14:44:09,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 273 transitions, 2398 flow [2024-10-14 14:44:09,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-14 14:44:09,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-10-14 14:44:09,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 326 transitions. [2024-10-14 14:44:09,592 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5544217687074829 [2024-10-14 14:44:09,592 INFO L175 Difference]: Start difference. First operand has 137 places, 73 transitions, 737 flow. Second operand 21 states and 326 transitions. [2024-10-14 14:44:09,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 273 transitions, 2398 flow [2024-10-14 14:44:09,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 273 transitions, 1952 flow, removed 211 selfloop flow, removed 33 redundant places. [2024-10-14 14:44:09,799 INFO L231 Difference]: Finished difference. Result has 110 places, 108 transitions, 1352 flow [2024-10-14 14:44:09,799 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1352, PETRI_PLACES=110, PETRI_TRANSITIONS=108} [2024-10-14 14:44:09,800 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 83 predicate places. [2024-10-14 14:44:09,800 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 108 transitions, 1352 flow [2024-10-14 14:44:09,800 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 7.958333333333333) internal successors, (191), 24 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:44:09,800 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:44:09,800 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:44:09,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-10-14 14:44:10,004 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-14 14:44:10,005 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:44:10,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:44:10,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1652630351, now seen corresponding path program 11 times [2024-10-14 14:44:10,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:44:10,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423369658] [2024-10-14 14:44:10,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:44:10,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:44:10,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:44:10,238 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-14 14:44:10,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:44:10,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423369658] [2024-10-14 14:44:10,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423369658] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:44:10,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760691510] [2024-10-14 14:44:10,239 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-14 14:44:10,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:44:10,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:44:10,242 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:44:10,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-14 14:44:10,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-10-14 14:44:10,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:44:10,339 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-14 14:44:10,340 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:44:10,410 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-14 14:44:10,410 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:44:10,568 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-14 14:44:10,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760691510] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:44:10,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:44:10,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 8] total 12 [2024-10-14 14:44:10,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681996794] [2024-10-14 14:44:10,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:44:10,570 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-14 14:44:10,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:44:10,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-14 14:44:10,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2024-10-14 14:44:10,571 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-14 14:44:10,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 108 transitions, 1352 flow. Second operand has 13 states, 13 states have (on average 10.153846153846153) internal successors, (132), 13 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:44:10,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:44:10,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-14 14:44:10,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:44:11,965 INFO L124 PetriNetUnfolderBase]: 9364/16041 cut-off events. [2024-10-14 14:44:11,965 INFO L125 PetriNetUnfolderBase]: For 39881/39881 co-relation queries the response was YES. [2024-10-14 14:44:12,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46300 conditions, 16041 events. 9364/16041 cut-off events. For 39881/39881 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 109522 event pairs, 1913 based on Foata normal form. 22/13578 useless extension candidates. Maximal degree in co-relation 46257. Up to 4280 conditions per place. [2024-10-14 14:44:12,061 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 110 selfloop transitions, 104 changer transitions 0/217 dead transitions. [2024-10-14 14:44:12,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 217 transitions, 2999 flow [2024-10-14 14:44:12,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 14:44:12,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-14 14:44:12,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-10-14 14:44:12,066 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2024-10-14 14:44:12,066 INFO L175 Difference]: Start difference. First operand has 110 places, 108 transitions, 1352 flow. Second operand 6 states and 114 transitions. [2024-10-14 14:44:12,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 217 transitions, 2999 flow [2024-10-14 14:44:12,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 217 transitions, 2771 flow, removed 109 selfloop flow, removed 6 redundant places. [2024-10-14 14:44:12,150 INFO L231 Difference]: Finished difference. Result has 110 places, 161 transitions, 2325 flow [2024-10-14 14:44:12,150 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1266, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2325, PETRI_PLACES=110, PETRI_TRANSITIONS=161} [2024-10-14 14:44:12,151 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 83 predicate places. [2024-10-14 14:44:12,151 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 161 transitions, 2325 flow [2024-10-14 14:44:12,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.153846153846153) internal successors, (132), 13 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:44:12,151 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:44:12,151 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:44:12,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-10-14 14:44:12,354 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-14 14:44:12,355 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:44:12,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:44:12,356 INFO L85 PathProgramCache]: Analyzing trace with hash -31066858, now seen corresponding path program 12 times [2024-10-14 14:44:12,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:44:12,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681924363] [2024-10-14 14:44:12,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:44:12,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:44:12,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:44:13,512 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:44:13,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:44:13,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681924363] [2024-10-14 14:44:13,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681924363] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:44:13,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668954162] [2024-10-14 14:44:13,513 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-14 14:44:13,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:44:13,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:44:13,514 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:44:13,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-10-14 14:44:13,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-10-14 14:44:13,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:44:13,638 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-14 14:44:13,639 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:44:13,778 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-10-14 14:44:13,779 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:44:13,820 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-14 14:44:13,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2024-10-14 14:44:14,044 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 5 proven. 47 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-14 14:44:14,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668954162] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:44:14,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:44:14,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 7, 10] total 29 [2024-10-14 14:44:14,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66761455] [2024-10-14 14:44:14,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:44:14,045 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-10-14 14:44:14,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:44:14,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-10-14 14:44:14,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2024-10-14 14:44:14,047 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-14 14:44:14,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 161 transitions, 2325 flow. Second operand has 30 states, 30 states have (on average 8.4) internal successors, (252), 30 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:44:14,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:44:14,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-14 14:44:14,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:44:18,468 INFO L124 PetriNetUnfolderBase]: 15025/25756 cut-off events. [2024-10-14 14:44:18,469 INFO L125 PetriNetUnfolderBase]: For 70741/70741 co-relation queries the response was YES. [2024-10-14 14:44:18,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74825 conditions, 25756 events. 15025/25756 cut-off events. For 70741/70741 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 187125 event pairs, 1258 based on Foata normal form. 16/21779 useless extension candidates. Maximal degree in co-relation 74781. Up to 4725 conditions per place. [2024-10-14 14:44:18,688 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 376 selfloop transitions, 225 changer transitions 90/694 dead transitions. [2024-10-14 14:44:18,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 694 transitions, 6738 flow [2024-10-14 14:44:18,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-10-14 14:44:18,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2024-10-14 14:44:18,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 764 transitions. [2024-10-14 14:44:18,691 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6063492063492063 [2024-10-14 14:44:18,691 INFO L175 Difference]: Start difference. First operand has 110 places, 161 transitions, 2325 flow. Second operand 45 states and 764 transitions. [2024-10-14 14:44:18,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 694 transitions, 6738 flow [2024-10-14 14:44:18,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 694 transitions, 6406 flow, removed 166 selfloop flow, removed 0 redundant places. [2024-10-14 14:44:18,961 INFO L231 Difference]: Finished difference. Result has 170 places, 259 transitions, 3975 flow [2024-10-14 14:44:18,962 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2175, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=3975, PETRI_PLACES=170, PETRI_TRANSITIONS=259} [2024-10-14 14:44:18,962 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 143 predicate places. [2024-10-14 14:44:18,962 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 259 transitions, 3975 flow [2024-10-14 14:44:18,962 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 8.4) internal successors, (252), 30 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:44:18,962 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:44:18,962 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:44:18,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-10-14 14:44:19,163 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-14 14:44:19,164 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:44:19,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:44:19,164 INFO L85 PathProgramCache]: Analyzing trace with hash 618730928, now seen corresponding path program 13 times [2024-10-14 14:44:19,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:44:19,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352687988] [2024-10-14 14:44:19,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:44:19,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:44:19,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:44:20,359 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:44:20,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:44:20,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352687988] [2024-10-14 14:44:20,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352687988] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:44:20,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156073441] [2024-10-14 14:44:20,359 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-10-14 14:44:20,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:44:20,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:44:20,361 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:44:20,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-10-14 14:44:20,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:44:20,431 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-14 14:44:20,432 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:44:20,784 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:44:20,785 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:44:20,808 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-10-14 14:44:20,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2024-10-14 14:44:20,836 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-14 14:44:20,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156073441] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:44:20,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:44:20,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 10] total 28 [2024-10-14 14:44:20,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569928511] [2024-10-14 14:44:20,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:44:20,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-14 14:44:20,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:44:20,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-14 14:44:20,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2024-10-14 14:44:20,838 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-14 14:44:20,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 259 transitions, 3975 flow. Second operand has 29 states, 29 states have (on average 7.896551724137931) internal successors, (229), 29 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:44:20,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:44:20,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-14 14:44:20,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:44:25,692 INFO L124 PetriNetUnfolderBase]: 18305/31302 cut-off events. [2024-10-14 14:44:25,692 INFO L125 PetriNetUnfolderBase]: For 110605/110605 co-relation queries the response was YES. [2024-10-14 14:44:25,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91535 conditions, 31302 events. 18305/31302 cut-off events. For 110605/110605 co-relation queries the response was YES. Maximal size of possible extension queue 737. Compared 235131 event pairs, 2147 based on Foata normal form. 29/26477 useless extension candidates. Maximal degree in co-relation 91474. Up to 5750 conditions per place. [2024-10-14 14:44:26,038 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 174 selfloop transitions, 285 changer transitions 93/555 dead transitions. [2024-10-14 14:44:26,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 555 transitions, 6353 flow [2024-10-14 14:44:26,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-14 14:44:26,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-10-14 14:44:26,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 460 transitions. [2024-10-14 14:44:26,040 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5867346938775511 [2024-10-14 14:44:26,040 INFO L175 Difference]: Start difference. First operand has 170 places, 259 transitions, 3975 flow. Second operand 28 states and 460 transitions. [2024-10-14 14:44:26,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 555 transitions, 6353 flow [2024-10-14 14:44:26,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 555 transitions, 5795 flow, removed 68 selfloop flow, removed 13 redundant places. [2024-10-14 14:44:26,401 INFO L231 Difference]: Finished difference. Result has 200 places, 307 transitions, 5221 flow [2024-10-14 14:44:26,402 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=3457, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=5221, PETRI_PLACES=200, PETRI_TRANSITIONS=307} [2024-10-14 14:44:26,402 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 173 predicate places. [2024-10-14 14:44:26,402 INFO L471 AbstractCegarLoop]: Abstraction has has 200 places, 307 transitions, 5221 flow [2024-10-14 14:44:26,402 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 7.896551724137931) internal successors, (229), 29 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:44:26,402 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:44:26,402 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:44:26,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-10-14 14:44:26,606 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-10-14 14:44:26,607 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:44:26,607 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:44:26,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1537074276, now seen corresponding path program 14 times [2024-10-14 14:44:26,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:44:26,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352699539] [2024-10-14 14:44:26,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:44:26,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:44:26,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:44:26,694 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-14 14:44:26,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:44:26,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352699539] [2024-10-14 14:44:26,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352699539] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:44:26,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746250765] [2024-10-14 14:44:26,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 14:44:26,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:44:26,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:44:26,697 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:44:26,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-10-14 14:44:26,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 14:44:26,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:44:26,780 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-14 14:44:26,781 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:44:26,822 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-14 14:44:26,822 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:44:26,987 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 22 proven. 44 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-10-14 14:44:26,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746250765] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:44:26,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:44:26,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 10] total 15 [2024-10-14 14:44:26,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826774216] [2024-10-14 14:44:26,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:44:26,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-14 14:44:26,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:44:26,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-14 14:44:26,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2024-10-14 14:44:26,989 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-14 14:44:26,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 307 transitions, 5221 flow. Second operand has 16 states, 16 states have (on average 9.9375) internal successors, (159), 16 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:44:26,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:44:26,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-14 14:44:26,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:44:34,631 INFO L124 PetriNetUnfolderBase]: 28463/48602 cut-off events. [2024-10-14 14:44:34,632 INFO L125 PetriNetUnfolderBase]: For 181774/181774 co-relation queries the response was YES. [2024-10-14 14:44:35,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148595 conditions, 48602 events. 28463/48602 cut-off events. For 181774/181774 co-relation queries the response was YES. Maximal size of possible extension queue 1100. Compared 387818 event pairs, 4951 based on Foata normal form. 22/41095 useless extension candidates. Maximal degree in co-relation 148517. Up to 10850 conditions per place. [2024-10-14 14:44:35,342 INFO L140 encePairwiseOnDemand]: 25/28 looper letters, 169 selfloop transitions, 335 changer transitions 0/507 dead transitions. [2024-10-14 14:44:35,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 507 transitions, 9493 flow [2024-10-14 14:44:35,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-14 14:44:35,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-14 14:44:35,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-10-14 14:44:35,343 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6887755102040817 [2024-10-14 14:44:35,343 INFO L175 Difference]: Start difference. First operand has 200 places, 307 transitions, 5221 flow. Second operand 7 states and 135 transitions. [2024-10-14 14:44:35,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 507 transitions, 9493 flow [2024-10-14 14:44:36,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 507 transitions, 8728 flow, removed 177 selfloop flow, removed 25 redundant places. [2024-10-14 14:44:36,194 INFO L231 Difference]: Finished difference. Result has 182 places, 437 transitions, 8040 flow [2024-10-14 14:44:36,194 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=4741, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8040, PETRI_PLACES=182, PETRI_TRANSITIONS=437} [2024-10-14 14:44:36,194 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 155 predicate places. [2024-10-14 14:44:36,194 INFO L471 AbstractCegarLoop]: Abstraction has has 182 places, 437 transitions, 8040 flow [2024-10-14 14:44:36,195 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.9375) internal successors, (159), 16 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:44:36,195 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:44:36,195 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:44:36,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-10-14 14:44:36,395 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:44:36,395 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:44:36,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:44:36,396 INFO L85 PathProgramCache]: Analyzing trace with hash -826604279, now seen corresponding path program 15 times [2024-10-14 14:44:36,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:44:36,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644557730] [2024-10-14 14:44:36,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:44:36,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:44:36,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:44:37,150 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:44:37,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:44:37,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644557730] [2024-10-14 14:44:37,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644557730] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:44:37,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628883957] [2024-10-14 14:44:37,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 14:44:37,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:44:37,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:44:37,153 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:44:37,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-10-14 14:44:37,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-10-14 14:44:37,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:44:37,420 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-14 14:44:37,421 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:44:37,764 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 31 proven. 55 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 14:44:37,764 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:44:37,810 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-14 14:44:37,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2024-10-14 14:44:38,318 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 27 proven. 59 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-14 14:44:38,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628883957] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:44:38,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:44:38,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 44 [2024-10-14 14:44:38,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652999874] [2024-10-14 14:44:38,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:44:38,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-10-14 14:44:38,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:44:38,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-10-14 14:44:38,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=1658, Unknown=0, NotChecked=0, Total=1980 [2024-10-14 14:44:38,324 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-14 14:44:38,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 437 transitions, 8040 flow. Second operand has 45 states, 45 states have (on average 7.666666666666667) internal successors, (345), 45 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:44:38,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:44:38,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-14 14:44:38,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:44:47,664 INFO L124 PetriNetUnfolderBase]: 25421/44165 cut-off events. [2024-10-14 14:44:47,664 INFO L125 PetriNetUnfolderBase]: For 180286/180286 co-relation queries the response was YES. [2024-10-14 14:44:48,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133579 conditions, 44165 events. 25421/44165 cut-off events. For 180286/180286 co-relation queries the response was YES. Maximal size of possible extension queue 1172. Compared 363463 event pairs, 8115 based on Foata normal form. 814/37979 useless extension candidates. Maximal degree in co-relation 133514. Up to 25248 conditions per place. [2024-10-14 14:44:48,246 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 336 selfloop transitions, 36 changer transitions 357/732 dead transitions. [2024-10-14 14:44:48,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 732 transitions, 9624 flow [2024-10-14 14:44:48,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-10-14 14:44:48,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-10-14 14:44:48,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 593 transitions. [2024-10-14 14:44:48,248 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5573308270676691 [2024-10-14 14:44:48,248 INFO L175 Difference]: Start difference. First operand has 182 places, 437 transitions, 8040 flow. Second operand 38 states and 593 transitions. [2024-10-14 14:44:48,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 732 transitions, 9624 flow [2024-10-14 14:44:49,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 732 transitions, 9194 flow, removed 211 selfloop flow, removed 2 redundant places. [2024-10-14 14:44:49,398 INFO L231 Difference]: Finished difference. Result has 233 places, 264 transitions, 4607 flow [2024-10-14 14:44:49,399 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=5864, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=4607, PETRI_PLACES=233, PETRI_TRANSITIONS=264} [2024-10-14 14:44:49,399 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 206 predicate places. [2024-10-14 14:44:49,399 INFO L471 AbstractCegarLoop]: Abstraction has has 233 places, 264 transitions, 4607 flow [2024-10-14 14:44:49,400 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 7.666666666666667) internal successors, (345), 45 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:44:49,400 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:44:49,400 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:44:49,413 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-10-14 14:44:49,601 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:44:49,602 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:44:49,602 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:44:49,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1467000485, now seen corresponding path program 16 times [2024-10-14 14:44:49,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:44:49,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614161331] [2024-10-14 14:44:49,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:44:49,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:44:49,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:44:50,288 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 30 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:44:50,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:44:50,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614161331] [2024-10-14 14:44:50,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614161331] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:44:50,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602701051] [2024-10-14 14:44:50,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-14 14:44:50,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:44:50,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:44:50,290 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:44:50,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-10-14 14:44:50,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-14 14:44:50,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:44:50,374 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-10-14 14:44:50,375 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:44:50,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-10-14 14:44:50,964 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-14 14:44:50,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2024-10-14 14:44:50,969 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 18 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:44:50,969 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:44:51,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2024-10-14 14:44:51,680 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-10-14 14:44:51,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 43 [2024-10-14 14:44:51,954 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 28 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:44:51,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602701051] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:44:51,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:44:51,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 50 [2024-10-14 14:44:51,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109876768] [2024-10-14 14:44:51,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:44:51,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-10-14 14:44:51,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:44:51,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-10-14 14:44:51,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=2284, Unknown=0, NotChecked=0, Total=2550 [2024-10-14 14:44:51,956 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-14 14:44:51,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 264 transitions, 4607 flow. Second operand has 51 states, 51 states have (on average 7.745098039215686) internal successors, (395), 51 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:44:51,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:44:51,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-14 14:44:51,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:44:58,185 INFO L124 PetriNetUnfolderBase]: 16694/28660 cut-off events. [2024-10-14 14:44:58,185 INFO L125 PetriNetUnfolderBase]: For 136310/136310 co-relation queries the response was YES. [2024-10-14 14:44:58,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90890 conditions, 28660 events. 16694/28660 cut-off events. For 136310/136310 co-relation queries the response was YES. Maximal size of possible extension queue 689. Compared 217721 event pairs, 8115 based on Foata normal form. 1/24202 useless extension candidates. Maximal degree in co-relation 90808. Up to 25248 conditions per place. [2024-10-14 14:44:58,590 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 322 selfloop transitions, 27 changer transitions 129/481 dead transitions. [2024-10-14 14:44:58,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 481 transitions, 6203 flow [2024-10-14 14:44:58,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-14 14:44:58,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-10-14 14:44:58,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 391 transitions. [2024-10-14 14:44:58,591 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5370879120879121 [2024-10-14 14:44:58,591 INFO L175 Difference]: Start difference. First operand has 233 places, 264 transitions, 4607 flow. Second operand 26 states and 391 transitions. [2024-10-14 14:44:58,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 481 transitions, 6203 flow [2024-10-14 14:44:59,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 481 transitions, 5697 flow, removed 105 selfloop flow, removed 48 redundant places. [2024-10-14 14:44:59,399 INFO L231 Difference]: Finished difference. Result has 183 places, 258 transitions, 4115 flow [2024-10-14 14:44:59,399 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=4146, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4115, PETRI_PLACES=183, PETRI_TRANSITIONS=258} [2024-10-14 14:44:59,400 INFO L277 CegarLoopForPetriNet]: 27 programPoint places, 156 predicate places. [2024-10-14 14:44:59,400 INFO L471 AbstractCegarLoop]: Abstraction has has 183 places, 258 transitions, 4115 flow [2024-10-14 14:44:59,400 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 7.745098039215686) internal successors, (395), 51 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:44:59,400 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:44:59,400 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 14:44:59,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-10-14 14:44:59,600 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:44:59,600 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-10-14 14:44:59,601 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:44:59,601 INFO L85 PathProgramCache]: Analyzing trace with hash -2124203703, now seen corresponding path program 17 times [2024-10-14 14:44:59,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:44:59,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312581475] [2024-10-14 14:44:59,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:44:59,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:44:59,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:45:00,137 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 26 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:45:00,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:45:00,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312581475] [2024-10-14 14:45:00,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312581475] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:45:00,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704658962] [2024-10-14 14:45:00,138 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-14 14:45:00,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:45:00,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:45:00,139 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 14:45:00,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-10-14 14:45:00,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-10-14 14:45:00,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 14:45:00,245 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-14 14:45:00,246 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:45:00,556 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-10-14 14:45:00,556 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:45:00,582 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-10-14 14:45:00,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2024-10-14 14:45:00,612 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-14 14:45:00,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704658962] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 14:45:00,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 14:45:00,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12, 11] total 28 [2024-10-14 14:45:00,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289894967] [2024-10-14 14:45:00,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 14:45:00,613 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-14 14:45:00,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:45:00,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-14 14:45:00,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2024-10-14 14:45:00,614 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2024-10-14 14:45:00,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 258 transitions, 4115 flow. Second operand has 29 states, 29 states have (on average 8.206896551724139) internal successors, (238), 29 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:45:00,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:45:00,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2024-10-14 14:45:00,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:45:05,481 INFO L124 PetriNetUnfolderBase]: 18975/32487 cut-off events. [2024-10-14 14:45:05,481 INFO L125 PetriNetUnfolderBase]: For 140653/140653 co-relation queries the response was YES.