./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/array-eq-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/array-eq-trans.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e7f1528a4c77969c5bff279724a3ed43475460be047e2e4b141f1353c3ea9cfe --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 10:44:33,625 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 10:44:33,712 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-09 10:44:33,718 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 10:44:33,719 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 10:44:33,751 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 10:44:33,752 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 10:44:33,753 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 10:44:33,753 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 10:44:33,755 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 10:44:33,756 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 10:44:33,756 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 10:44:33,757 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 10:44:33,757 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 10:44:33,759 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 10:44:33,760 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 10:44:33,760 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 10:44:33,760 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 10:44:33,761 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 10:44:33,761 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 10:44:33,761 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 10:44:33,765 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 10:44:33,766 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 10:44:33,766 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 10:44:33,766 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 10:44:33,766 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 10:44:33,767 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 10:44:33,767 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 10:44:33,767 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 10:44:33,768 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 10:44:33,768 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 10:44:33,768 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 10:44:33,768 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 10:44:33,769 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:44:33,769 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 10:44:33,769 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 10:44:33,770 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 10:44:33,771 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 10:44:33,771 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 10:44:33,771 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 10:44:33,772 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 10:44:33,772 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 10:44:33,773 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e7f1528a4c77969c5bff279724a3ed43475460be047e2e4b141f1353c3ea9cfe [2024-11-09 10:44:34,035 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 10:44:34,064 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 10:44:34,067 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 10:44:34,069 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 10:44:34,069 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 10:44:34,070 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/array-eq-trans.wvr.c [2024-11-09 10:44:35,553 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 10:44:35,755 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 10:44:35,757 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-trans.wvr.c [2024-11-09 10:44:35,765 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3e1a81ee/1ffbd45cc30c4e84909ee91a4a36689d/FLAGc69d1ea3e [2024-11-09 10:44:35,777 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3e1a81ee/1ffbd45cc30c4e84909ee91a4a36689d [2024-11-09 10:44:35,780 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 10:44:35,781 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 10:44:35,783 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 10:44:35,785 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 10:44:35,790 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 10:44:35,791 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:44:35" (1/1) ... [2024-11-09 10:44:35,792 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53fc2e7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:35, skipping insertion in model container [2024-11-09 10:44:35,792 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:44:35" (1/1) ... [2024-11-09 10:44:35,823 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 10:44:36,047 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-09 10:44:36,050 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:44:36,059 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 10:44:36,089 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:44:36,110 INFO L204 MainTranslator]: Completed translation [2024-11-09 10:44:36,111 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:36 WrapperNode [2024-11-09 10:44:36,111 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 10:44:36,112 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 10:44:36,112 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 10:44:36,113 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 10:44:36,123 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:36" (1/1) ... [2024-11-09 10:44:36,133 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:36" (1/1) ... [2024-11-09 10:44:36,162 INFO L138 Inliner]: procedures = 23, calls = 32, calls flagged for inlining = 11, calls inlined = 15, statements flattened = 196 [2024-11-09 10:44:36,163 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 10:44:36,163 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 10:44:36,164 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 10:44:36,164 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 10:44:36,174 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:36" (1/1) ... [2024-11-09 10:44:36,175 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:36" (1/1) ... [2024-11-09 10:44:36,179 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:36" (1/1) ... [2024-11-09 10:44:36,201 INFO L175 MemorySlicer]: Split 17 memory accesses to 2 slices as follows [2, 15]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-09 10:44:36,201 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:36" (1/1) ... [2024-11-09 10:44:36,202 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:36" (1/1) ... [2024-11-09 10:44:36,210 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:36" (1/1) ... [2024-11-09 10:44:36,217 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:36" (1/1) ... [2024-11-09 10:44:36,219 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:36" (1/1) ... [2024-11-09 10:44:36,221 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:36" (1/1) ... [2024-11-09 10:44:36,224 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 10:44:36,225 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 10:44:36,225 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 10:44:36,226 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 10:44:36,227 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:36" (1/1) ... [2024-11-09 10:44:36,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:44:36,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:44:36,270 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-09 10:44:36,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-09 10:44:36,327 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 10:44:36,327 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-09 10:44:36,327 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-09 10:44:36,329 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-09 10:44:36,329 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-09 10:44:36,329 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-09 10:44:36,329 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-09 10:44:36,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 10:44:36,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 10:44:36,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 10:44:36,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 10:44:36,330 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 10:44:36,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 10:44:36,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 10:44:36,330 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 10:44:36,330 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 10:44:36,334 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-09 10:44:36,495 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 10:44:36,497 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 10:44:37,130 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 10:44:37,130 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 10:44:37,414 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 10:44:37,414 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-09 10:44:37,414 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:44:37 BoogieIcfgContainer [2024-11-09 10:44:37,415 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 10:44:37,420 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 10:44:37,420 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 10:44:37,425 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 10:44:37,425 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:44:35" (1/3) ... [2024-11-09 10:44:37,427 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7274c0c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:44:37, skipping insertion in model container [2024-11-09 10:44:37,428 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:36" (2/3) ... [2024-11-09 10:44:37,429 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7274c0c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:44:37, skipping insertion in model container [2024-11-09 10:44:37,429 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:44:37" (3/3) ... [2024-11-09 10:44:37,430 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-trans.wvr.c [2024-11-09 10:44:37,451 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 10:44:37,451 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2024-11-09 10:44:37,451 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 10:44:37,530 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-09 10:44:37,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 105 transitions, 231 flow [2024-11-09 10:44:37,637 INFO L124 PetriNetUnfolderBase]: 15/102 cut-off events. [2024-11-09 10:44:37,638 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-09 10:44:37,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 102 events. 15/102 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 300 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 69. Up to 2 conditions per place. [2024-11-09 10:44:37,643 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 105 transitions, 231 flow [2024-11-09 10:44:37,650 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 101 transitions, 220 flow [2024-11-09 10:44:37,660 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 10:44:37,668 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=None, 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;@1a8de51, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 10:44:37,669 INFO L334 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2024-11-09 10:44:37,673 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 10:44:37,674 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-09 10:44:37,674 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:44:37,674 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:44:37,675 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:44:37,676 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-09 10:44:37,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:44:37,683 INFO L85 PathProgramCache]: Analyzing trace with hash 769178, now seen corresponding path program 1 times [2024-11-09 10:44:37,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:44:37,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294331412] [2024-11-09 10:44:37,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:44:37,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:44:37,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:44:37,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:44:38,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:44:38,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294331412] [2024-11-09 10:44:38,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294331412] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:44:38,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:44:38,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 10:44:38,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463831673] [2024-11-09 10:44:38,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:44:38,016 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:44:38,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:44:38,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:44:38,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:44:38,142 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 105 [2024-11-09 10:44:38,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 101 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:44:38,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:44:38,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 105 [2024-11-09 10:44:38,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:44:38,475 INFO L124 PetriNetUnfolderBase]: 703/1193 cut-off events. [2024-11-09 10:44:38,476 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2024-11-09 10:44:38,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2147 conditions, 1193 events. 703/1193 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5718 event pairs, 266 based on Foata normal form. 1/730 useless extension candidates. Maximal degree in co-relation 1879. Up to 878 conditions per place. [2024-11-09 10:44:38,498 INFO L140 encePairwiseOnDemand]: 99/105 looper letters, 38 selfloop transitions, 2 changer transitions 0/96 dead transitions. [2024-11-09 10:44:38,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 96 transitions, 290 flow [2024-11-09 10:44:38,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:44:38,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:44:38,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 224 transitions. [2024-11-09 10:44:38,515 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7111111111111111 [2024-11-09 10:44:38,517 INFO L175 Difference]: Start difference. First operand has 96 places, 101 transitions, 220 flow. Second operand 3 states and 224 transitions. [2024-11-09 10:44:38,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 96 transitions, 290 flow [2024-11-09 10:44:38,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 96 transitions, 278 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-09 10:44:38,532 INFO L231 Difference]: Finished difference. Result has 87 places, 96 transitions, 202 flow [2024-11-09 10:44:38,535 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=87, PETRI_TRANSITIONS=96} [2024-11-09 10:44:38,540 INFO L277 CegarLoopForPetriNet]: 96 programPoint places, -9 predicate places. [2024-11-09 10:44:38,541 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 96 transitions, 202 flow [2024-11-09 10:44:38,541 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:44:38,542 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:44:38,542 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:44:38,542 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 10:44:38,542 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-09 10:44:38,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:44:38,543 INFO L85 PathProgramCache]: Analyzing trace with hash 769179, now seen corresponding path program 1 times [2024-11-09 10:44:38,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:44:38,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037758984] [2024-11-09 10:44:38,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:44:38,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:44:38,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:44:38,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:44:38,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:44:38,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037758984] [2024-11-09 10:44:38,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037758984] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:44:38,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:44:38,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:44:38,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273176304] [2024-11-09 10:44:38,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:44:38,919 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:44:38,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:44:38,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:44:38,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:44:39,102 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 105 [2024-11-09 10:44:39,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 96 transitions, 202 flow. Second operand has 4 states, 4 states have (on average 60.75) internal successors, (243), 4 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:44:39,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:44:39,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 105 [2024-11-09 10:44:39,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:44:39,352 INFO L124 PetriNetUnfolderBase]: 704/1196 cut-off events. [2024-11-09 10:44:39,353 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-11-09 10:44:39,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2114 conditions, 1196 events. 704/1196 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5720 event pairs, 266 based on Foata normal form. 0/729 useless extension candidates. Maximal degree in co-relation 2077. Up to 891 conditions per place. [2024-11-09 10:44:39,370 INFO L140 encePairwiseOnDemand]: 100/105 looper letters, 42 selfloop transitions, 4 changer transitions 0/99 dead transitions. [2024-11-09 10:44:39,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 99 transitions, 300 flow [2024-11-09 10:44:39,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:44:39,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:44:39,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 287 transitions. [2024-11-09 10:44:39,373 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6833333333333333 [2024-11-09 10:44:39,373 INFO L175 Difference]: Start difference. First operand has 87 places, 96 transitions, 202 flow. Second operand 4 states and 287 transitions. [2024-11-09 10:44:39,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 99 transitions, 300 flow [2024-11-09 10:44:39,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 99 transitions, 296 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:44:39,380 INFO L231 Difference]: Finished difference. Result has 90 places, 99 transitions, 225 flow [2024-11-09 10:44:39,381 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=225, PETRI_PLACES=90, PETRI_TRANSITIONS=99} [2024-11-09 10:44:39,382 INFO L277 CegarLoopForPetriNet]: 96 programPoint places, -6 predicate places. [2024-11-09 10:44:39,382 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 99 transitions, 225 flow [2024-11-09 10:44:39,382 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.75) internal successors, (243), 4 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:44:39,383 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:44:39,383 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-09 10:44:39,383 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 10:44:39,384 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-09 10:44:39,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:44:39,385 INFO L85 PathProgramCache]: Analyzing trace with hash 23844803, now seen corresponding path program 1 times [2024-11-09 10:44:39,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:44:39,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140500481] [2024-11-09 10:44:39,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:44:39,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:44:39,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:44:39,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:44:39,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:44:39,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140500481] [2024-11-09 10:44:39,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140500481] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:44:39,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:44:39,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:44:39,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119732241] [2024-11-09 10:44:39,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:44:39,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:44:39,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:44:39,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:44:39,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:44:39,810 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 105 [2024-11-09 10:44:39,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 99 transitions, 225 flow. Second operand has 5 states, 5 states have (on average 60.8) internal successors, (304), 5 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:44:39,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:44:39,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 105 [2024-11-09 10:44:39,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:44:40,081 INFO L124 PetriNetUnfolderBase]: 705/1199 cut-off events. [2024-11-09 10:44:40,081 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-11-09 10:44:40,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2131 conditions, 1199 events. 705/1199 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5723 event pairs, 266 based on Foata normal form. 0/731 useless extension candidates. Maximal degree in co-relation 2106. Up to 890 conditions per place. [2024-11-09 10:44:40,092 INFO L140 encePairwiseOnDemand]: 97/105 looper letters, 42 selfloop transitions, 7 changer transitions 0/102 dead transitions. [2024-11-09 10:44:40,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 102 transitions, 329 flow [2024-11-09 10:44:40,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:44:40,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:44:40,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 350 transitions. [2024-11-09 10:44:40,098 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-09 10:44:40,098 INFO L175 Difference]: Start difference. First operand has 90 places, 99 transitions, 225 flow. Second operand 5 states and 350 transitions. [2024-11-09 10:44:40,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 102 transitions, 329 flow [2024-11-09 10:44:40,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 102 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:44:40,101 INFO L231 Difference]: Finished difference. Result has 95 places, 102 transitions, 259 flow [2024-11-09 10:44:40,102 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=259, PETRI_PLACES=95, PETRI_TRANSITIONS=102} [2024-11-09 10:44:40,104 INFO L277 CegarLoopForPetriNet]: 96 programPoint places, -1 predicate places. [2024-11-09 10:44:40,105 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 102 transitions, 259 flow [2024-11-09 10:44:40,105 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 60.8) internal successors, (304), 5 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:44:40,106 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:44:40,106 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-09 10:44:40,106 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 10:44:40,106 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-09 10:44:40,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:44:40,107 INFO L85 PathProgramCache]: Analyzing trace with hash 739205423, now seen corresponding path program 1 times [2024-11-09 10:44:40,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:44:40,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513761590] [2024-11-09 10:44:40,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:44:40,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:44:40,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:44:40,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:44:40,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:44:40,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513761590] [2024-11-09 10:44:40,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513761590] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:44:40,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417752229] [2024-11-09 10:44:40,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:44:40,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:44:40,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:44:40,327 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:44:40,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 10:44:40,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:44:40,412 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 10:44:40,421 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:44:40,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 1 [2024-11-09 10:44:40,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:44:40,642 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:44:40,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:44:40,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417752229] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:44:40,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:44:40,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-09 10:44:40,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77379437] [2024-11-09 10:44:40,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:44:40,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 10:44:40,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:44:40,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 10:44:40,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-09 10:44:41,277 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 105 [2024-11-09 10:44:41,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 102 transitions, 259 flow. Second operand has 11 states, 11 states have (on average 61.36363636363637) internal successors, (675), 11 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:44:41,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:44:41,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 105 [2024-11-09 10:44:41,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:44:41,669 INFO L124 PetriNetUnfolderBase]: 706/1201 cut-off events. [2024-11-09 10:44:41,670 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-09 10:44:41,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2154 conditions, 1201 events. 706/1201 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5733 event pairs, 266 based on Foata normal form. 0/736 useless extension candidates. Maximal degree in co-relation 2116. Up to 891 conditions per place. [2024-11-09 10:44:41,684 INFO L140 encePairwiseOnDemand]: 100/105 looper letters, 41 selfloop transitions, 10 changer transitions 0/104 dead transitions. [2024-11-09 10:44:41,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 104 transitions, 372 flow [2024-11-09 10:44:41,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 10:44:41,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-09 10:44:41,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 530 transitions. [2024-11-09 10:44:41,687 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-11-09 10:44:41,688 INFO L175 Difference]: Start difference. First operand has 95 places, 102 transitions, 259 flow. Second operand 8 states and 530 transitions. [2024-11-09 10:44:41,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 104 transitions, 372 flow [2024-11-09 10:44:41,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 104 transitions, 371 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:44:41,693 INFO L231 Difference]: Finished difference. Result has 100 places, 104 transitions, 289 flow [2024-11-09 10:44:41,694 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=289, PETRI_PLACES=100, PETRI_TRANSITIONS=104} [2024-11-09 10:44:41,694 INFO L277 CegarLoopForPetriNet]: 96 programPoint places, 4 predicate places. [2024-11-09 10:44:41,695 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 104 transitions, 289 flow [2024-11-09 10:44:41,696 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 61.36363636363637) internal successors, (675), 11 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:44:41,696 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:44:41,697 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-09 10:44:41,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 10:44:41,904 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:44:41,905 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-09 10:44:41,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:44:41,906 INFO L85 PathProgramCache]: Analyzing trace with hash 739190331, now seen corresponding path program 1 times [2024-11-09 10:44:41,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:44:41,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811050969] [2024-11-09 10:44:41,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:44:41,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:44:41,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:44:42,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:44:42,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:44:42,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811050969] [2024-11-09 10:44:42,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811050969] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:44:42,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:44:42,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:44:42,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763274981] [2024-11-09 10:44:42,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:44:42,116 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:44:42,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:44:42,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:44:42,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:44:42,301 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 105 [2024-11-09 10:44:42,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 104 transitions, 289 flow. Second operand has 5 states, 5 states have (on average 61.0) internal successors, (305), 5 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:44:42,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:44:42,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 105 [2024-11-09 10:44:42,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:44:42,507 INFO L124 PetriNetUnfolderBase]: 707/1204 cut-off events. [2024-11-09 10:44:42,508 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-09 10:44:42,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2170 conditions, 1204 events. 707/1204 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5782 event pairs, 266 based on Foata normal form. 0/738 useless extension candidates. Maximal degree in co-relation 2124. Up to 895 conditions per place. [2024-11-09 10:44:42,519 INFO L140 encePairwiseOnDemand]: 96/105 looper letters, 45 selfloop transitions, 9 changer transitions 0/107 dead transitions. [2024-11-09 10:44:42,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 107 transitions, 403 flow [2024-11-09 10:44:42,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:44:42,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:44:42,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 349 transitions. [2024-11-09 10:44:42,524 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6647619047619048 [2024-11-09 10:44:42,524 INFO L175 Difference]: Start difference. First operand has 100 places, 104 transitions, 289 flow. Second operand 5 states and 349 transitions. [2024-11-09 10:44:42,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 107 transitions, 403 flow [2024-11-09 10:44:42,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 107 transitions, 356 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-11-09 10:44:42,557 INFO L231 Difference]: Finished difference. Result has 98 places, 107 transitions, 285 flow [2024-11-09 10:44:42,557 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=285, PETRI_PLACES=98, PETRI_TRANSITIONS=107} [2024-11-09 10:44:42,559 INFO L277 CegarLoopForPetriNet]: 96 programPoint places, 2 predicate places. [2024-11-09 10:44:42,562 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 107 transitions, 285 flow [2024-11-09 10:44:42,563 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 61.0) internal successors, (305), 5 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:44:42,563 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:44:42,563 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-09 10:44:42,563 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 10:44:42,563 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-09 10:44:42,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:44:42,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1440043699, now seen corresponding path program 1 times [2024-11-09 10:44:42,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:44:42,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597309480] [2024-11-09 10:44:42,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:44:42,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:44:42,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:44:42,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:44:42,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:44:42,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597309480] [2024-11-09 10:44:42,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597309480] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:44:42,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146180844] [2024-11-09 10:44:42,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:44:42,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:44:42,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:44:42,793 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:44:42,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 10:44:42,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:44:42,867 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 10:44:42,869 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:44:42,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 9 [2024-11-09 10:44:43,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:44:43,094 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:44:43,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:44:43,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146180844] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:44:43,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:44:43,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-09 10:44:43,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302614714] [2024-11-09 10:44:43,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:44:43,261 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 10:44:43,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:44:43,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 10:44:43,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-09 10:44:44,496 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 105 [2024-11-09 10:44:44,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 107 transitions, 285 flow. Second operand has 13 states, 13 states have (on average 60.30769230769231) internal successors, (784), 13 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:44:44,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:44:44,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 105 [2024-11-09 10:44:44,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:44:44,994 INFO L124 PetriNetUnfolderBase]: 800/1395 cut-off events. [2024-11-09 10:44:44,994 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-11-09 10:44:44,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2496 conditions, 1395 events. 800/1395 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7120 event pairs, 335 based on Foata normal form. 0/822 useless extension candidates. Maximal degree in co-relation 2444. Up to 1016 conditions per place. [2024-11-09 10:44:45,007 INFO L140 encePairwiseOnDemand]: 97/105 looper letters, 39 selfloop transitions, 18 changer transitions 0/109 dead transitions. [2024-11-09 10:44:45,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 109 transitions, 410 flow [2024-11-09 10:44:45,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:44:45,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:44:45,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 587 transitions. [2024-11-09 10:44:45,010 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6211640211640211 [2024-11-09 10:44:45,010 INFO L175 Difference]: Start difference. First operand has 98 places, 107 transitions, 285 flow. Second operand 9 states and 587 transitions. [2024-11-09 10:44:45,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 109 transitions, 410 flow [2024-11-09 10:44:45,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 109 transitions, 402 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:44:45,015 INFO L231 Difference]: Finished difference. Result has 103 places, 109 transitions, 324 flow [2024-11-09 10:44:45,016 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=324, PETRI_PLACES=103, PETRI_TRANSITIONS=109} [2024-11-09 10:44:45,016 INFO L277 CegarLoopForPetriNet]: 96 programPoint places, 7 predicate places. [2024-11-09 10:44:45,016 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 109 transitions, 324 flow [2024-11-09 10:44:45,019 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 60.30769230769231) internal successors, (784), 13 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:44:45,019 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:44:45,019 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-09 10:44:45,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 10:44:45,222 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 [2024-11-09 10:44:45,223 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-09 10:44:45,224 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:44:45,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1692327978, now seen corresponding path program 1 times [2024-11-09 10:44:45,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:44:45,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139528819] [2024-11-09 10:44:45,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:44:45,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:44:45,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:44:45,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:44:45,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:44:45,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139528819] [2024-11-09 10:44:45,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139528819] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:44:45,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351295668] [2024-11-09 10:44:45,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:44:45,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:44:45,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:44:45,446 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:44:45,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 10:44:45,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:44:45,519 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 10:44:45,521 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:44:45,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 10 treesize of output 9 [2024-11-09 10:44:45,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:44:45,709 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:44:45,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:44:45,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351295668] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:44:45,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:44:45,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-09 10:44:45,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943688288] [2024-11-09 10:44:45,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:44:45,886 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 10:44:45,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:44:45,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 10:44:45,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-09 10:44:46,782 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 105 [2024-11-09 10:44:46,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 109 transitions, 324 flow. Second operand has 13 states, 13 states have (on average 61.46153846153846) internal successors, (799), 13 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:44:46,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:44:46,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 105 [2024-11-09 10:44:46,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:44:47,282 INFO L124 PetriNetUnfolderBase]: 708/1205 cut-off events. [2024-11-09 10:44:47,283 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-11-09 10:44:47,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2183 conditions, 1205 events. 708/1205 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5750 event pairs, 266 based on Foata normal form. 0/743 useless extension candidates. Maximal degree in co-relation 2128. Up to 887 conditions per place. [2024-11-09 10:44:47,297 INFO L140 encePairwiseOnDemand]: 96/105 looper letters, 36 selfloop transitions, 19 changer transitions 0/108 dead transitions. [2024-11-09 10:44:47,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 108 transitions, 430 flow [2024-11-09 10:44:47,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 10:44:47,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-09 10:44:47,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 467 transitions. [2024-11-09 10:44:47,299 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6353741496598639 [2024-11-09 10:44:47,299 INFO L175 Difference]: Start difference. First operand has 103 places, 109 transitions, 324 flow. Second operand 7 states and 467 transitions. [2024-11-09 10:44:47,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 108 transitions, 430 flow [2024-11-09 10:44:47,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 108 transitions, 397 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-09 10:44:47,306 INFO L231 Difference]: Finished difference. Result has 103 places, 108 transitions, 325 flow [2024-11-09 10:44:47,306 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=325, PETRI_PLACES=103, PETRI_TRANSITIONS=108} [2024-11-09 10:44:47,307 INFO L277 CegarLoopForPetriNet]: 96 programPoint places, 7 predicate places. [2024-11-09 10:44:47,309 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 108 transitions, 325 flow [2024-11-09 10:44:47,309 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 61.46153846153846) internal successors, (799), 13 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:44:47,311 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:44:47,311 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:44:47,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 10:44:47,512 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 [2024-11-09 10:44:47,513 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-09 10:44:47,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:44:47,513 INFO L85 PathProgramCache]: Analyzing trace with hash 926078392, now seen corresponding path program 1 times [2024-11-09 10:44:47,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:44:47,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46937935] [2024-11-09 10:44:47,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:44:47,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:44:47,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:44:47,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:44:47,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:44:47,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46937935] [2024-11-09 10:44:47,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46937935] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:44:47,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:44:47,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:44:47,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861450148] [2024-11-09 10:44:47,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:44:47,587 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:44:47,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:44:47,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:44:47,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:44:47,626 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 105 [2024-11-09 10:44:47,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 108 transitions, 325 flow. Second operand has 4 states, 4 states have (on average 63.5) internal successors, (254), 4 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:44:47,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:44:47,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 105 [2024-11-09 10:44:47,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:44:47,877 INFO L124 PetriNetUnfolderBase]: 1226/2193 cut-off events. [2024-11-09 10:44:47,877 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-11-09 10:44:47,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3927 conditions, 2193 events. 1226/2193 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 12600 event pairs, 533 based on Foata normal form. 0/1364 useless extension candidates. Maximal degree in co-relation 2462. Up to 1029 conditions per place. [2024-11-09 10:44:47,895 INFO L140 encePairwiseOnDemand]: 97/105 looper letters, 91 selfloop transitions, 8 changer transitions 0/151 dead transitions. [2024-11-09 10:44:47,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 151 transitions, 671 flow [2024-11-09 10:44:47,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:44:47,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:44:47,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 395 transitions. [2024-11-09 10:44:47,898 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7523809523809524 [2024-11-09 10:44:47,898 INFO L175 Difference]: Start difference. First operand has 103 places, 108 transitions, 325 flow. Second operand 5 states and 395 transitions. [2024-11-09 10:44:47,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 151 transitions, 671 flow [2024-11-09 10:44:47,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 151 transitions, 607 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-11-09 10:44:47,901 INFO L231 Difference]: Finished difference. Result has 103 places, 113 transitions, 346 flow [2024-11-09 10:44:47,902 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=346, PETRI_PLACES=103, PETRI_TRANSITIONS=113} [2024-11-09 10:44:47,903 INFO L277 CegarLoopForPetriNet]: 96 programPoint places, 7 predicate places. [2024-11-09 10:44:47,903 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 113 transitions, 346 flow [2024-11-09 10:44:47,904 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.5) internal successors, (254), 4 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:44:47,904 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:44:47,904 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:44:47,904 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-09 10:44:47,905 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-09 10:44:47,905 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:44:47,905 INFO L85 PathProgramCache]: Analyzing trace with hash -329060956, now seen corresponding path program 1 times [2024-11-09 10:44:47,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:44:47,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991493721] [2024-11-09 10:44:47,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:44:47,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:44:47,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:44:47,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:44:47,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:44:47,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991493721] [2024-11-09 10:44:47,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991493721] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:44:47,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:44:47,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:44:47,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051465353] [2024-11-09 10:44:47,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:44:47,993 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:44:47,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:44:47,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:44:47,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:44:48,047 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 105 [2024-11-09 10:44:48,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 113 transitions, 346 flow. Second operand has 5 states, 5 states have (on average 63.6) internal successors, (318), 5 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:44:48,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:44:48,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 105 [2024-11-09 10:44:48,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:44:48,484 INFO L124 PetriNetUnfolderBase]: 2626/4724 cut-off events. [2024-11-09 10:44:48,485 INFO L125 PetriNetUnfolderBase]: For 119/119 co-relation queries the response was YES. [2024-11-09 10:44:48,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8428 conditions, 4724 events. 2626/4724 cut-off events. For 119/119 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 31672 event pairs, 873 based on Foata normal form. 37/3116 useless extension candidates. Maximal degree in co-relation 5608. Up to 1360 conditions per place. [2024-11-09 10:44:48,513 INFO L140 encePairwiseOnDemand]: 97/105 looper letters, 115 selfloop transitions, 12 changer transitions 0/179 dead transitions. [2024-11-09 10:44:48,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 179 transitions, 770 flow [2024-11-09 10:44:48,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:44:48,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:44:48,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 481 transitions. [2024-11-09 10:44:48,515 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7634920634920634 [2024-11-09 10:44:48,515 INFO L175 Difference]: Start difference. First operand has 103 places, 113 transitions, 346 flow. Second operand 6 states and 481 transitions. [2024-11-09 10:44:48,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 179 transitions, 770 flow [2024-11-09 10:44:48,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 179 transitions, 765 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:44:48,519 INFO L231 Difference]: Finished difference. Result has 109 places, 118 transitions, 421 flow [2024-11-09 10:44:48,519 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=421, PETRI_PLACES=109, PETRI_TRANSITIONS=118} [2024-11-09 10:44:48,520 INFO L277 CegarLoopForPetriNet]: 96 programPoint places, 13 predicate places. [2024-11-09 10:44:48,520 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 118 transitions, 421 flow [2024-11-09 10:44:48,521 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 63.6) internal successors, (318), 5 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:44:48,521 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:44:48,521 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:44:48,521 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-09 10:44:48,521 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-09 10:44:48,522 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:44:48,522 INFO L85 PathProgramCache]: Analyzing trace with hash 827618090, now seen corresponding path program 1 times [2024-11-09 10:44:48,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:44:48,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659728605] [2024-11-09 10:44:48,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:44:48,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:44:48,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:44:48,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:44:48,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:44:48,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659728605] [2024-11-09 10:44:48,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659728605] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:44:48,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:44:48,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:44:48,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312281700] [2024-11-09 10:44:48,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:44:48,586 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:44:48,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:44:48,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:44:48,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:44:48,614 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 105 [2024-11-09 10:44:48,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 118 transitions, 421 flow. Second operand has 5 states, 5 states have (on average 63.6) internal successors, (318), 5 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:44:48,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:44:48,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 105 [2024-11-09 10:44:48,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:44:49,127 INFO L124 PetriNetUnfolderBase]: 3124/5898 cut-off events. [2024-11-09 10:44:49,127 INFO L125 PetriNetUnfolderBase]: For 274/274 co-relation queries the response was YES. [2024-11-09 10:44:49,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10594 conditions, 5898 events. 3124/5898 cut-off events. For 274/274 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 42578 event pairs, 965 based on Foata normal form. 0/3964 useless extension candidates. Maximal degree in co-relation 6123. Up to 1919 conditions per place. [2024-11-09 10:44:49,163 INFO L140 encePairwiseOnDemand]: 97/105 looper letters, 113 selfloop transitions, 12 changer transitions 0/177 dead transitions. [2024-11-09 10:44:49,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 177 transitions, 811 flow [2024-11-09 10:44:49,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:44:49,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:44:49,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 477 transitions. [2024-11-09 10:44:49,166 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7571428571428571 [2024-11-09 10:44:49,166 INFO L175 Difference]: Start difference. First operand has 109 places, 118 transitions, 421 flow. Second operand 6 states and 477 transitions. [2024-11-09 10:44:49,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 177 transitions, 811 flow [2024-11-09 10:44:49,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 177 transitions, 808 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:44:49,170 INFO L231 Difference]: Finished difference. Result has 115 places, 119 transitions, 460 flow [2024-11-09 10:44:49,171 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=460, PETRI_PLACES=115, PETRI_TRANSITIONS=119} [2024-11-09 10:44:49,173 INFO L277 CegarLoopForPetriNet]: 96 programPoint places, 19 predicate places. [2024-11-09 10:44:49,174 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 119 transitions, 460 flow [2024-11-09 10:44:49,174 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 63.6) internal successors, (318), 5 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:44:49,174 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:44:49,174 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:44:49,175 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-09 10:44:49,175 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-09 10:44:49,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:44:49,175 INFO L85 PathProgramCache]: Analyzing trace with hash 487531924, now seen corresponding path program 1 times [2024-11-09 10:44:49,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:44:49,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479732474] [2024-11-09 10:44:49,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:44:49,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:44:49,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:44:49,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:44:49,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:44:49,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479732474] [2024-11-09 10:44:49,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479732474] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:44:49,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:44:49,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:44:49,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061814303] [2024-11-09 10:44:49,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:44:49,329 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:44:49,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:44:49,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:44:49,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:44:49,384 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 105 [2024-11-09 10:44:49,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 119 transitions, 460 flow. Second operand has 4 states, 4 states have (on average 54.5) internal successors, (218), 4 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:44:49,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:44:49,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 105 [2024-11-09 10:44:49,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:44:49,776 INFO L124 PetriNetUnfolderBase]: 3203/5333 cut-off events. [2024-11-09 10:44:49,776 INFO L125 PetriNetUnfolderBase]: For 564/564 co-relation queries the response was YES. [2024-11-09 10:44:49,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10578 conditions, 5333 events. 3203/5333 cut-off events. For 564/564 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 32968 event pairs, 1965 based on Foata normal form. 0/4488 useless extension candidates. Maximal degree in co-relation 6415. Up to 4402 conditions per place. [2024-11-09 10:44:49,853 INFO L140 encePairwiseOnDemand]: 98/105 looper letters, 61 selfloop transitions, 9 changer transitions 0/115 dead transitions. [2024-11-09 10:44:49,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 115 transitions, 592 flow [2024-11-09 10:44:49,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:44:49,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:44:49,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 308 transitions. [2024-11-09 10:44:49,855 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5866666666666667 [2024-11-09 10:44:49,855 INFO L175 Difference]: Start difference. First operand has 115 places, 119 transitions, 460 flow. Second operand 5 states and 308 transitions. [2024-11-09 10:44:49,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 115 transitions, 592 flow [2024-11-09 10:44:49,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 115 transitions, 579 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:44:49,862 INFO L231 Difference]: Finished difference. Result has 112 places, 115 transitions, 457 flow [2024-11-09 10:44:49,863 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=457, PETRI_PLACES=112, PETRI_TRANSITIONS=115} [2024-11-09 10:44:49,863 INFO L277 CegarLoopForPetriNet]: 96 programPoint places, 16 predicate places. [2024-11-09 10:44:49,863 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 115 transitions, 457 flow [2024-11-09 10:44:49,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.5) internal successors, (218), 4 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:44:49,864 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:44:49,864 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:44:49,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-09 10:44:49,864 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-09 10:44:49,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:44:49,865 INFO L85 PathProgramCache]: Analyzing trace with hash 747044510, now seen corresponding path program 1 times [2024-11-09 10:44:49,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:44:49,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052821673] [2024-11-09 10:44:49,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:44:49,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:44:49,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:44:49,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:44:49,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:44:49,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052821673] [2024-11-09 10:44:49,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052821673] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:44:49,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:44:49,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:44:49,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550503102] [2024-11-09 10:44:49,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:44:49,938 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:44:49,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:44:49,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:44:49,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:44:49,973 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 105 [2024-11-09 10:44:49,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 115 transitions, 457 flow. Second operand has 4 states, 4 states have (on average 64.5) internal successors, (258), 4 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:44:49,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:44:49,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 105 [2024-11-09 10:44:49,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:44:50,286 INFO L124 PetriNetUnfolderBase]: 2340/3823 cut-off events. [2024-11-09 10:44:50,287 INFO L125 PetriNetUnfolderBase]: For 452/452 co-relation queries the response was YES. [2024-11-09 10:44:50,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7711 conditions, 3823 events. 2340/3823 cut-off events. For 452/452 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 21518 event pairs, 1459 based on Foata normal form. 0/3079 useless extension candidates. Maximal degree in co-relation 4888. Up to 2510 conditions per place. [2024-11-09 10:44:50,312 INFO L140 encePairwiseOnDemand]: 97/105 looper letters, 94 selfloop transitions, 10 changer transitions 0/152 dead transitions. [2024-11-09 10:44:50,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 152 transitions, 774 flow [2024-11-09 10:44:50,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:44:50,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:44:50,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 393 transitions. [2024-11-09 10:44:50,385 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7485714285714286 [2024-11-09 10:44:50,385 INFO L175 Difference]: Start difference. First operand has 112 places, 115 transitions, 457 flow. Second operand 5 states and 393 transitions. [2024-11-09 10:44:50,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 152 transitions, 774 flow [2024-11-09 10:44:50,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 152 transitions, 760 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:44:50,390 INFO L231 Difference]: Finished difference. Result has 114 places, 115 transitions, 473 flow [2024-11-09 10:44:50,390 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=473, PETRI_PLACES=114, PETRI_TRANSITIONS=115} [2024-11-09 10:44:50,392 INFO L277 CegarLoopForPetriNet]: 96 programPoint places, 18 predicate places. [2024-11-09 10:44:50,392 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 115 transitions, 473 flow [2024-11-09 10:44:50,393 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.5) internal successors, (258), 4 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:44:50,393 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:44:50,393 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:44:50,393 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-09 10:44:50,394 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-09 10:44:50,394 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:44:50,394 INFO L85 PathProgramCache]: Analyzing trace with hash 588380698, now seen corresponding path program 1 times [2024-11-09 10:44:50,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:44:50,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781447572] [2024-11-09 10:44:50,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:44:50,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:44:50,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:44:50,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:44:50,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:44:50,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781447572] [2024-11-09 10:44:50,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781447572] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:44:50,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:44:50,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:44:50,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59738960] [2024-11-09 10:44:50,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:44:50,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:44:50,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:44:50,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:44:50,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:44:50,501 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 105 [2024-11-09 10:44:50,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 115 transitions, 473 flow. Second operand has 5 states, 5 states have (on average 64.0) internal successors, (320), 5 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:44:50,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:44:50,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 105 [2024-11-09 10:44:50,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:44:51,107 INFO L124 PetriNetUnfolderBase]: 3767/7062 cut-off events. [2024-11-09 10:44:51,108 INFO L125 PetriNetUnfolderBase]: For 784/784 co-relation queries the response was YES. [2024-11-09 10:44:51,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13416 conditions, 7062 events. 3767/7062 cut-off events. For 784/784 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 51680 event pairs, 1621 based on Foata normal form. 83/5634 useless extension candidates. Maximal degree in co-relation 10025. Up to 2038 conditions per place. [2024-11-09 10:44:51,143 INFO L140 encePairwiseOnDemand]: 99/105 looper letters, 109 selfloop transitions, 15 changer transitions 0/172 dead transitions. [2024-11-09 10:44:51,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 172 transitions, 855 flow [2024-11-09 10:44:51,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:44:51,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:44:51,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 411 transitions. [2024-11-09 10:44:51,146 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7828571428571428 [2024-11-09 10:44:51,146 INFO L175 Difference]: Start difference. First operand has 114 places, 115 transitions, 473 flow. Second operand 5 states and 411 transitions. [2024-11-09 10:44:51,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 172 transitions, 855 flow [2024-11-09 10:44:51,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 172 transitions, 835 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-09 10:44:51,150 INFO L231 Difference]: Finished difference. Result has 115 places, 115 transitions, 489 flow [2024-11-09 10:44:51,151 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=489, PETRI_PLACES=115, PETRI_TRANSITIONS=115} [2024-11-09 10:44:51,151 INFO L277 CegarLoopForPetriNet]: 96 programPoint places, 19 predicate places. [2024-11-09 10:44:51,151 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 115 transitions, 489 flow [2024-11-09 10:44:51,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.0) internal successors, (320), 5 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:44:51,152 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:44:51,152 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:44:51,152 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-09 10:44:51,152 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-09 10:44:51,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:44:51,153 INFO L85 PathProgramCache]: Analyzing trace with hash 487531925, now seen corresponding path program 1 times [2024-11-09 10:44:51,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:44:51,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464266239] [2024-11-09 10:44:51,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:44:51,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:44:51,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:44:51,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:44:51,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:44:51,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464266239] [2024-11-09 10:44:51,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464266239] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:44:51,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635351931] [2024-11-09 10:44:51,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:44:51,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:44:51,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:44:51,434 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) [2024-11-09 10:44:51,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 10:44:51,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:44:51,514 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-09 10:44:51,517 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:44:51,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2024-11-09 10:44:51,621 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-09 10:44:51,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-09 10:44:51,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-09 10:44:51,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:44:51,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-09 10:44:51,696 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:44:51,696 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 11 treesize of output 11 [2024-11-09 10:44:51,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:44:51,738 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:44:51,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 189 treesize of output 183 [2024-11-09 10:44:52,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:44:52,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635351931] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:44:52,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:44:52,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-11-09 10:44:52,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930282488] [2024-11-09 10:44:52,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:44:52,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 10:44:52,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:44:52,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 10:44:52,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2024-11-09 10:44:54,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:44:56,425 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 105 [2024-11-09 10:44:56,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 115 transitions, 489 flow. Second operand has 14 states, 14 states have (on average 52.142857142857146) internal successors, (730), 14 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:44:56,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:44:56,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 105 [2024-11-09 10:44:56,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:44:57,452 INFO L124 PetriNetUnfolderBase]: 5081/8939 cut-off events. [2024-11-09 10:44:57,452 INFO L125 PetriNetUnfolderBase]: For 1091/1091 co-relation queries the response was YES. [2024-11-09 10:44:57,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17588 conditions, 8939 events. 5081/8939 cut-off events. For 1091/1091 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 63660 event pairs, 2625 based on Foata normal form. 0/7580 useless extension candidates. Maximal degree in co-relation 12591. Up to 3149 conditions per place. [2024-11-09 10:44:57,507 INFO L140 encePairwiseOnDemand]: 93/105 looper letters, 121 selfloop transitions, 24 changer transitions 0/188 dead transitions. [2024-11-09 10:44:57,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 188 transitions, 974 flow [2024-11-09 10:44:57,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 10:44:57,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-09 10:44:57,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 532 transitions. [2024-11-09 10:44:57,509 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-11-09 10:44:57,510 INFO L175 Difference]: Start difference. First operand has 115 places, 115 transitions, 489 flow. Second operand 8 states and 532 transitions. [2024-11-09 10:44:57,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 188 transitions, 974 flow [2024-11-09 10:44:57,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 188 transitions, 970 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:44:57,516 INFO L231 Difference]: Finished difference. Result has 124 places, 118 transitions, 568 flow [2024-11-09 10:44:57,516 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=568, PETRI_PLACES=124, PETRI_TRANSITIONS=118} [2024-11-09 10:44:57,517 INFO L277 CegarLoopForPetriNet]: 96 programPoint places, 28 predicate places. [2024-11-09 10:44:57,518 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 118 transitions, 568 flow [2024-11-09 10:44:57,518 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.142857142857146) internal successors, (730), 14 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:44:57,518 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:44:57,518 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:44:57,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 10:44:57,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:44:57,720 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-09 10:44:57,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:44:57,720 INFO L85 PathProgramCache]: Analyzing trace with hash -2066378759, now seen corresponding path program 1 times [2024-11-09 10:44:57,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:44:57,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534505334] [2024-11-09 10:44:57,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:44:57,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:44:57,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:44:57,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:44:57,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:44:57,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534505334] [2024-11-09 10:44:57,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534505334] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:44:57,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:44:57,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:44:57,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011916698] [2024-11-09 10:44:57,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:44:57,814 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:44:57,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:44:57,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:44:57,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:44:57,869 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 105 [2024-11-09 10:44:57,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 118 transitions, 568 flow. Second operand has 4 states, 4 states have (on average 55.5) internal successors, (222), 4 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:44:57,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:44:57,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 105 [2024-11-09 10:44:57,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:44:58,528 INFO L124 PetriNetUnfolderBase]: 5217/9022 cut-off events. [2024-11-09 10:44:58,529 INFO L125 PetriNetUnfolderBase]: For 1995/1995 co-relation queries the response was YES. [2024-11-09 10:44:58,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18410 conditions, 9022 events. 5217/9022 cut-off events. For 1995/1995 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 63820 event pairs, 3326 based on Foata normal form. 0/7554 useless extension candidates. Maximal degree in co-relation 13773. Up to 7307 conditions per place. [2024-11-09 10:44:58,580 INFO L140 encePairwiseOnDemand]: 98/105 looper letters, 58 selfloop transitions, 12 changer transitions 0/114 dead transitions. [2024-11-09 10:44:58,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 114 transitions, 700 flow [2024-11-09 10:44:58,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:44:58,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:44:58,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 312 transitions. [2024-11-09 10:44:58,582 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5942857142857143 [2024-11-09 10:44:58,582 INFO L175 Difference]: Start difference. First operand has 124 places, 118 transitions, 568 flow. Second operand 5 states and 312 transitions. [2024-11-09 10:44:58,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 114 transitions, 700 flow [2024-11-09 10:44:58,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 114 transitions, 669 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-11-09 10:44:58,597 INFO L231 Difference]: Finished difference. Result has 122 places, 114 transitions, 553 flow [2024-11-09 10:44:58,597 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=529, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=553, PETRI_PLACES=122, PETRI_TRANSITIONS=114} [2024-11-09 10:44:58,598 INFO L277 CegarLoopForPetriNet]: 96 programPoint places, 26 predicate places. [2024-11-09 10:44:58,598 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 114 transitions, 553 flow [2024-11-09 10:44:58,598 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.5) internal successors, (222), 4 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:44:58,599 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:44:58,599 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:44:58,599 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-09 10:44:58,599 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-09 10:44:58,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:44:58,600 INFO L85 PathProgramCache]: Analyzing trace with hash -2066378758, now seen corresponding path program 1 times [2024-11-09 10:44:58,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:44:58,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610295384] [2024-11-09 10:44:58,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:44:58,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:44:58,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:44:58,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:44:58,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:44:58,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610295384] [2024-11-09 10:44:58,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610295384] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:44:58,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760148012] [2024-11-09 10:44:58,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:44:58,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:44:58,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:44:58,857 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) [2024-11-09 10:44:58,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 10:44:58,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:44:58,953 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 10:44:58,956 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:44:58,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2024-11-09 10:44:59,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:44:59,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-09 10:44:59,042 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:44:59,043 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 11 treesize of output 11 [2024-11-09 10:44:59,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:44:59,092 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:44:59,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 61 treesize of output 57 [2024-11-09 10:44:59,294 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:44:59,294 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 34 treesize of output 39 [2024-11-09 10:44:59,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:44:59,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760148012] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:44:59,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:44:59,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-09 10:44:59,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102418035] [2024-11-09 10:44:59,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:44:59,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 10:44:59,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:44:59,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 10:44:59,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-11-09 10:45:00,332 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 105 [2024-11-09 10:45:00,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 114 transitions, 553 flow. Second operand has 12 states, 12 states have (on average 59.0) internal successors, (708), 12 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:45:00,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:45:00,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 105 [2024-11-09 10:45:00,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:45:01,406 INFO L124 PetriNetUnfolderBase]: 4746/8195 cut-off events. [2024-11-09 10:45:01,407 INFO L125 PetriNetUnfolderBase]: For 1768/1768 co-relation queries the response was YES. [2024-11-09 10:45:01,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16713 conditions, 8195 events. 4746/8195 cut-off events. For 1768/1768 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 55841 event pairs, 1584 based on Foata normal form. 0/6767 useless extension candidates. Maximal degree in co-relation 12099. Up to 2350 conditions per place. [2024-11-09 10:45:01,451 INFO L140 encePairwiseOnDemand]: 93/105 looper letters, 139 selfloop transitions, 27 changer transitions 0/210 dead transitions. [2024-11-09 10:45:01,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 210 transitions, 1123 flow [2024-11-09 10:45:01,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 10:45:01,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-09 10:45:01,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 721 transitions. [2024-11-09 10:45:01,454 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6866666666666666 [2024-11-09 10:45:01,454 INFO L175 Difference]: Start difference. First operand has 122 places, 114 transitions, 553 flow. Second operand 10 states and 721 transitions. [2024-11-09 10:45:01,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 210 transitions, 1123 flow [2024-11-09 10:45:01,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 210 transitions, 1103 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:45:01,464 INFO L231 Difference]: Finished difference. Result has 132 places, 119 transitions, 641 flow [2024-11-09 10:45:01,464 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=535, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=641, PETRI_PLACES=132, PETRI_TRANSITIONS=119} [2024-11-09 10:45:01,464 INFO L277 CegarLoopForPetriNet]: 96 programPoint places, 36 predicate places. [2024-11-09 10:45:01,465 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 119 transitions, 641 flow [2024-11-09 10:45:01,465 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 59.0) internal successors, (708), 12 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:45:01,465 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:45:01,465 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:45:01,485 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 10:45:01,669 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-09 10:45:01,670 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-09 10:45:01,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:45:01,671 INFO L85 PathProgramCache]: Analyzing trace with hash 449921162, now seen corresponding path program 1 times [2024-11-09 10:45:01,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:45:01,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430147038] [2024-11-09 10:45:01,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:01,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:45:01,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:01,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:45:01,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:45:01,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430147038] [2024-11-09 10:45:01,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430147038] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:45:01,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:45:01,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:45:01,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471821081] [2024-11-09 10:45:01,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:45:01,737 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:45:01,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:45:01,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:45:01,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:45:01,777 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 105 [2024-11-09 10:45:01,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 119 transitions, 641 flow. Second operand has 5 states, 5 states have (on average 64.4) internal successors, (322), 5 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:45:01,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:45:01,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 105 [2024-11-09 10:45:01,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:45:02,434 INFO L124 PetriNetUnfolderBase]: 3640/6278 cut-off events. [2024-11-09 10:45:02,434 INFO L125 PetriNetUnfolderBase]: For 4498/4670 co-relation queries the response was YES. [2024-11-09 10:45:02,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13611 conditions, 6278 events. 3640/6278 cut-off events. For 4498/4670 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 41137 event pairs, 2543 based on Foata normal form. 60/5587 useless extension candidates. Maximal degree in co-relation 10909. Up to 3950 conditions per place. [2024-11-09 10:45:02,472 INFO L140 encePairwiseOnDemand]: 100/105 looper letters, 87 selfloop transitions, 14 changer transitions 0/148 dead transitions. [2024-11-09 10:45:02,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 148 transitions, 938 flow [2024-11-09 10:45:02,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:45:02,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:45:02,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 381 transitions. [2024-11-09 10:45:02,475 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7257142857142858 [2024-11-09 10:45:02,475 INFO L175 Difference]: Start difference. First operand has 132 places, 119 transitions, 641 flow. Second operand 5 states and 381 transitions. [2024-11-09 10:45:02,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 148 transitions, 938 flow [2024-11-09 10:45:02,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 148 transitions, 878 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-11-09 10:45:02,482 INFO L231 Difference]: Finished difference. Result has 131 places, 119 transitions, 620 flow [2024-11-09 10:45:02,482 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=586, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=620, PETRI_PLACES=131, PETRI_TRANSITIONS=119} [2024-11-09 10:45:02,483 INFO L277 CegarLoopForPetriNet]: 96 programPoint places, 35 predicate places. [2024-11-09 10:45:02,483 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 119 transitions, 620 flow [2024-11-09 10:45:02,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.4) internal successors, (322), 5 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:45:02,483 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:45:02,483 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:45:02,483 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-09 10:45:02,484 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-09 10:45:02,484 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:45:02,484 INFO L85 PathProgramCache]: Analyzing trace with hash -490856052, now seen corresponding path program 1 times [2024-11-09 10:45:02,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:45:02,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304081270] [2024-11-09 10:45:02,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:02,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:45:02,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:02,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:45:02,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:45:02,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304081270] [2024-11-09 10:45:02,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304081270] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:45:02,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702365605] [2024-11-09 10:45:02,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:02,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:45:02,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:45:02,670 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) [2024-11-09 10:45:02,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 10:45:02,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:02,758 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 10:45:02,759 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:45:02,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2024-11-09 10:45:02,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:45:02,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-09 10:45:02,849 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:45:02,849 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 11 treesize of output 11 [2024-11-09 10:45:02,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:45:02,914 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:45:02,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 61 treesize of output 57 [2024-11-09 10:45:03,062 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:45:03,062 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 34 treesize of output 39 [2024-11-09 10:45:03,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:45:03,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702365605] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:45:03,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:45:03,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-09 10:45:03,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657479360] [2024-11-09 10:45:03,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:45:03,087 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 10:45:03,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:45:03,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 10:45:03,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-11-09 10:45:03,788 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 105 [2024-11-09 10:45:03,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 119 transitions, 620 flow. Second operand has 12 states, 12 states have (on average 58.833333333333336) internal successors, (706), 12 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:45:03,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:45:03,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 105 [2024-11-09 10:45:03,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:45:04,939 INFO L124 PetriNetUnfolderBase]: 5024/9031 cut-off events. [2024-11-09 10:45:04,940 INFO L125 PetriNetUnfolderBase]: For 4034/4288 co-relation queries the response was YES. [2024-11-09 10:45:04,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18569 conditions, 9031 events. 5024/9031 cut-off events. For 4034/4288 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 65114 event pairs, 1827 based on Foata normal form. 0/7550 useless extension candidates. Maximal degree in co-relation 15705. Up to 2724 conditions per place. [2024-11-09 10:45:05,012 INFO L140 encePairwiseOnDemand]: 93/105 looper letters, 138 selfloop transitions, 27 changer transitions 0/209 dead transitions. [2024-11-09 10:45:05,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 209 transitions, 1196 flow [2024-11-09 10:45:05,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 10:45:05,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-09 10:45:05,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 707 transitions. [2024-11-09 10:45:05,015 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6733333333333333 [2024-11-09 10:45:05,015 INFO L175 Difference]: Start difference. First operand has 131 places, 119 transitions, 620 flow. Second operand 10 states and 707 transitions. [2024-11-09 10:45:05,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 209 transitions, 1196 flow [2024-11-09 10:45:05,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 209 transitions, 1172 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:45:05,023 INFO L231 Difference]: Finished difference. Result has 141 places, 122 transitions, 686 flow [2024-11-09 10:45:05,024 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=596, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=686, PETRI_PLACES=141, PETRI_TRANSITIONS=122} [2024-11-09 10:45:05,024 INFO L277 CegarLoopForPetriNet]: 96 programPoint places, 45 predicate places. [2024-11-09 10:45:05,025 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 122 transitions, 686 flow [2024-11-09 10:45:05,025 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 58.833333333333336) internal successors, (706), 12 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:45:05,025 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:45:05,025 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:45:05,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 10:45:05,226 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 10:45:05,227 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-09 10:45:05,227 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:45:05,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1963332334, now seen corresponding path program 1 times [2024-11-09 10:45:05,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:45:05,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579778152] [2024-11-09 10:45:05,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:05,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:45:05,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:05,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:45:05,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:45:05,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579778152] [2024-11-09 10:45:05,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579778152] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:45:05,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:45:05,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:45:05,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432741441] [2024-11-09 10:45:05,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:45:05,291 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:45:05,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:45:05,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:45:05,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:45:05,372 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 105 [2024-11-09 10:45:05,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 122 transitions, 686 flow. Second operand has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:45:05,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:45:05,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 105 [2024-11-09 10:45:05,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:45:06,022 INFO L124 PetriNetUnfolderBase]: 5049/9465 cut-off events. [2024-11-09 10:45:06,022 INFO L125 PetriNetUnfolderBase]: For 5898/6164 co-relation queries the response was YES. [2024-11-09 10:45:06,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20470 conditions, 9465 events. 5049/9465 cut-off events. For 5898/6164 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 72607 event pairs, 3696 based on Foata normal form. 0/8601 useless extension candidates. Maximal degree in co-relation 17610. Up to 7342 conditions per place. [2024-11-09 10:45:06,079 INFO L140 encePairwiseOnDemand]: 99/105 looper letters, 64 selfloop transitions, 9 changer transitions 0/118 dead transitions. [2024-11-09 10:45:06,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 118 transitions, 824 flow [2024-11-09 10:45:06,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:45:06,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:45:06,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 262 transitions. [2024-11-09 10:45:06,080 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6238095238095238 [2024-11-09 10:45:06,080 INFO L175 Difference]: Start difference. First operand has 141 places, 122 transitions, 686 flow. Second operand 4 states and 262 transitions. [2024-11-09 10:45:06,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 118 transitions, 824 flow [2024-11-09 10:45:06,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 118 transitions, 773 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-11-09 10:45:06,097 INFO L231 Difference]: Finished difference. Result has 134 places, 118 transitions, 645 flow [2024-11-09 10:45:06,097 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=627, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=645, PETRI_PLACES=134, PETRI_TRANSITIONS=118} [2024-11-09 10:45:06,098 INFO L277 CegarLoopForPetriNet]: 96 programPoint places, 38 predicate places. [2024-11-09 10:45:06,099 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 118 transitions, 645 flow [2024-11-09 10:45:06,100 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:45:06,100 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:45:06,100 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:45:06,100 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-09 10:45:06,100 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-09 10:45:06,100 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:45:06,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1963332335, now seen corresponding path program 1 times [2024-11-09 10:45:06,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:45:06,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520588781] [2024-11-09 10:45:06,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:06,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:45:06,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:06,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:45:06,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:45:06,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520588781] [2024-11-09 10:45:06,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520588781] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:45:06,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483627504] [2024-11-09 10:45:06,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:06,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:45:06,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:45:06,264 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) [2024-11-09 10:45:06,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 10:45:06,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:06,353 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 10:45:06,354 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:45:06,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:45:06,444 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:45:06,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 29 treesize of output 25 [2024-11-09 10:45:06,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:45:06,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483627504] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:45:06,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:45:06,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-09 10:45:06,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481397918] [2024-11-09 10:45:06,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:45:06,541 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 10:45:06,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:45:06,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 10:45:06,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-11-09 10:45:07,065 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 105 [2024-11-09 10:45:07,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 118 transitions, 645 flow. Second operand has 12 states, 12 states have (on average 62.333333333333336) internal successors, (748), 12 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:45:07,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:45:07,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 105 [2024-11-09 10:45:07,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:45:07,913 INFO L124 PetriNetUnfolderBase]: 5029/8804 cut-off events. [2024-11-09 10:45:07,913 INFO L125 PetriNetUnfolderBase]: For 4507/4757 co-relation queries the response was YES. [2024-11-09 10:45:07,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18996 conditions, 8804 events. 5029/8804 cut-off events. For 4507/4757 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 61210 event pairs, 1827 based on Foata normal form. 0/7667 useless extension candidates. Maximal degree in co-relation 16148. Up to 2373 conditions per place. [2024-11-09 10:45:07,952 INFO L140 encePairwiseOnDemand]: 93/105 looper letters, 136 selfloop transitions, 27 changer transitions 0/207 dead transitions. [2024-11-09 10:45:07,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 207 transitions, 1235 flow [2024-11-09 10:45:07,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 10:45:07,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-09 10:45:07,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 618 transitions. [2024-11-09 10:45:07,954 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7357142857142858 [2024-11-09 10:45:07,954 INFO L175 Difference]: Start difference. First operand has 134 places, 118 transitions, 645 flow. Second operand 8 states and 618 transitions. [2024-11-09 10:45:07,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 207 transitions, 1235 flow [2024-11-09 10:45:07,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 207 transitions, 1225 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:45:07,966 INFO L231 Difference]: Finished difference. Result has 143 places, 121 transitions, 725 flow [2024-11-09 10:45:07,966 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=635, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=725, PETRI_PLACES=143, PETRI_TRANSITIONS=121} [2024-11-09 10:45:07,967 INFO L277 CegarLoopForPetriNet]: 96 programPoint places, 47 predicate places. [2024-11-09 10:45:07,967 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 121 transitions, 725 flow [2024-11-09 10:45:07,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 62.333333333333336) internal successors, (748), 12 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:45:07,968 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:45:07,968 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:45:07,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 10:45:08,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:45:08,172 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-09 10:45:08,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:45:08,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1983873211, now seen corresponding path program 1 times [2024-11-09 10:45:08,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:45:08,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33520368] [2024-11-09 10:45:08,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:08,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:45:08,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:08,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:45:08,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:45:08,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33520368] [2024-11-09 10:45:08,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33520368] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:45:08,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036802415] [2024-11-09 10:45:08,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:08,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:45:08,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:45:08,512 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) [2024-11-09 10:45:08,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 10:45:08,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:08,603 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-09 10:45:08,604 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:45:08,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2024-11-09 10:45:08,680 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-09 10:45:08,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-09 10:45:08,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-09 10:45:08,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:45:08,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-09 10:45:08,732 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:45:08,733 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 11 treesize of output 11 [2024-11-09 10:45:08,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:45:08,809 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:45:09,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 189 treesize of output 183 [2024-11-09 10:45:09,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:45:09,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036802415] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:45:09,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:45:09,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 14 [2024-11-09 10:45:09,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545339098] [2024-11-09 10:45:09,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:45:09,220 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-09 10:45:09,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:45:09,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-09 10:45:09,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2024-11-09 10:45:15,345 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 105 [2024-11-09 10:45:15,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 121 transitions, 725 flow. Second operand has 16 states, 16 states have (on average 50.625) internal successors, (810), 16 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:45:15,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:45:15,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 105 [2024-11-09 10:45:15,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:45:16,983 INFO L124 PetriNetUnfolderBase]: 8783/15287 cut-off events. [2024-11-09 10:45:16,983 INFO L125 PetriNetUnfolderBase]: For 13096/13850 co-relation queries the response was YES. [2024-11-09 10:45:17,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35205 conditions, 15287 events. 8783/15287 cut-off events. For 13096/13850 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 116232 event pairs, 4925 based on Foata normal form. 0/13678 useless extension candidates. Maximal degree in co-relation 31122. Up to 5221 conditions per place. [2024-11-09 10:45:17,110 INFO L140 encePairwiseOnDemand]: 93/105 looper letters, 140 selfloop transitions, 26 changer transitions 0/205 dead transitions. [2024-11-09 10:45:17,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 205 transitions, 1385 flow [2024-11-09 10:45:17,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 10:45:17,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-09 10:45:17,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 515 transitions. [2024-11-09 10:45:17,112 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6130952380952381 [2024-11-09 10:45:17,112 INFO L175 Difference]: Start difference. First operand has 143 places, 121 transitions, 725 flow. Second operand 8 states and 515 transitions. [2024-11-09 10:45:17,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 205 transitions, 1385 flow [2024-11-09 10:45:17,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 205 transitions, 1331 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-09 10:45:17,131 INFO L231 Difference]: Finished difference. Result has 149 places, 124 transitions, 761 flow [2024-11-09 10:45:17,131 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=676, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=761, PETRI_PLACES=149, PETRI_TRANSITIONS=124} [2024-11-09 10:45:17,132 INFO L277 CegarLoopForPetriNet]: 96 programPoint places, 53 predicate places. [2024-11-09 10:45:17,132 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 124 transitions, 761 flow [2024-11-09 10:45:17,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 50.625) internal successors, (810), 16 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:45:17,132 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:45:17,132 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:45:17,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-09 10:45:17,333 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,SelfDestructingSolverStorable20 [2024-11-09 10:45:17,333 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-09 10:45:17,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:45:17,334 INFO L85 PathProgramCache]: Analyzing trace with hash 277422426, now seen corresponding path program 1 times [2024-11-09 10:45:17,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:45:17,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060586660] [2024-11-09 10:45:17,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:17,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:45:17,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:17,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:45:17,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:45:17,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060586660] [2024-11-09 10:45:17,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060586660] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:45:17,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239664387] [2024-11-09 10:45:17,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:17,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:45:17,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:45:17,429 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) [2024-11-09 10:45:17,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 10:45:17,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:17,519 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 10:45:17,520 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:45:17,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:45:17,606 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:45:17,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:45:17,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239664387] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:45:17,679 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:45:17,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2024-11-09 10:45:17,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921199152] [2024-11-09 10:45:17,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:45:17,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 10:45:17,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:45:17,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 10:45:17,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-11-09 10:45:17,927 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 105 [2024-11-09 10:45:17,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 124 transitions, 761 flow. Second operand has 15 states, 15 states have (on average 64.2) internal successors, (963), 15 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:45:17,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:45:17,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 105 [2024-11-09 10:45:17,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:45:21,443 INFO L124 PetriNetUnfolderBase]: 18400/31619 cut-off events. [2024-11-09 10:45:21,443 INFO L125 PetriNetUnfolderBase]: For 32119/34791 co-relation queries the response was YES. [2024-11-09 10:45:21,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75657 conditions, 31619 events. 18400/31619 cut-off events. For 32119/34791 co-relation queries the response was YES. Maximal size of possible extension queue 1079. Compared 260461 event pairs, 10350 based on Foata normal form. 516/29835 useless extension candidates. Maximal degree in co-relation 69128. Up to 7391 conditions per place. [2024-11-09 10:45:21,647 INFO L140 encePairwiseOnDemand]: 93/105 looper letters, 401 selfloop transitions, 78 changer transitions 0/528 dead transitions. [2024-11-09 10:45:21,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 528 transitions, 3408 flow [2024-11-09 10:45:21,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-09 10:45:21,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2024-11-09 10:45:21,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3285 transitions. [2024-11-09 10:45:21,653 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6801242236024845 [2024-11-09 10:45:21,653 INFO L175 Difference]: Start difference. First operand has 149 places, 124 transitions, 761 flow. Second operand 46 states and 3285 transitions. [2024-11-09 10:45:21,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 528 transitions, 3408 flow [2024-11-09 10:45:21,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 528 transitions, 3342 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-09 10:45:21,694 INFO L231 Difference]: Finished difference. Result has 205 places, 182 transitions, 1433 flow [2024-11-09 10:45:21,695 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=726, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=1433, PETRI_PLACES=205, PETRI_TRANSITIONS=182} [2024-11-09 10:45:21,695 INFO L277 CegarLoopForPetriNet]: 96 programPoint places, 109 predicate places. [2024-11-09 10:45:21,695 INFO L471 AbstractCegarLoop]: Abstraction has has 205 places, 182 transitions, 1433 flow [2024-11-09 10:45:21,696 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 64.2) internal successors, (963), 15 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:45:21,696 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:45:21,696 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:45:21,714 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 10:45:21,896 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:45:21,897 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-09 10:45:21,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:45:21,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1370528172, now seen corresponding path program 1 times [2024-11-09 10:45:21,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:45:21,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714374354] [2024-11-09 10:45:21,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:21,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:45:21,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:22,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:45:22,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:45:22,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714374354] [2024-11-09 10:45:22,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714374354] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:45:22,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505471732] [2024-11-09 10:45:22,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:22,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:45:22,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:45:22,045 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) [2024-11-09 10:45:22,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 10:45:22,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:22,144 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 10:45:22,146 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:45:22,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:45:22,254 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:45:22,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 29 treesize of output 25 [2024-11-09 10:45:22,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:45:22,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505471732] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:45:22,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:45:22,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-09 10:45:22,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504205533] [2024-11-09 10:45:22,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:45:22,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 10:45:22,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:45:22,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 10:45:22,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-11-09 10:45:22,879 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 105 [2024-11-09 10:45:22,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 182 transitions, 1433 flow. Second operand has 12 states, 12 states have (on average 62.833333333333336) internal successors, (754), 12 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:45:22,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:45:22,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 105 [2024-11-09 10:45:22,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:45:26,817 INFO L124 PetriNetUnfolderBase]: 20301/35348 cut-off events. [2024-11-09 10:45:26,817 INFO L125 PetriNetUnfolderBase]: For 46807/50647 co-relation queries the response was YES. [2024-11-09 10:45:27,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85437 conditions, 35348 events. 20301/35348 cut-off events. For 46807/50647 co-relation queries the response was YES. Maximal size of possible extension queue 1286. Compared 302454 event pairs, 7595 based on Foata normal form. 0/33308 useless extension candidates. Maximal degree in co-relation 84744. Up to 11292 conditions per place. [2024-11-09 10:45:27,154 INFO L140 encePairwiseOnDemand]: 93/105 looper letters, 187 selfloop transitions, 44 changer transitions 0/278 dead transitions. [2024-11-09 10:45:27,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 278 transitions, 2331 flow [2024-11-09 10:45:27,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 10:45:27,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-09 10:45:27,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 611 transitions. [2024-11-09 10:45:27,157 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7273809523809524 [2024-11-09 10:45:27,157 INFO L175 Difference]: Start difference. First operand has 205 places, 182 transitions, 1433 flow. Second operand 8 states and 611 transitions. [2024-11-09 10:45:27,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 278 transitions, 2331 flow [2024-11-09 10:45:27,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 278 transitions, 2283 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-11-09 10:45:27,263 INFO L231 Difference]: Finished difference. Result has 207 places, 185 transitions, 1518 flow [2024-11-09 10:45:27,263 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=1385, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1518, PETRI_PLACES=207, PETRI_TRANSITIONS=185} [2024-11-09 10:45:27,264 INFO L277 CegarLoopForPetriNet]: 96 programPoint places, 111 predicate places. [2024-11-09 10:45:27,264 INFO L471 AbstractCegarLoop]: Abstraction has has 207 places, 185 transitions, 1518 flow [2024-11-09 10:45:27,264 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 62.833333333333336) internal successors, (754), 12 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:45:27,265 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:45:27,265 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:45:27,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 10:45:27,466 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,SelfDestructingSolverStorable22 [2024-11-09 10:45:27,466 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-09 10:45:27,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:45:27,467 INFO L85 PathProgramCache]: Analyzing trace with hash 769716370, now seen corresponding path program 1 times [2024-11-09 10:45:27,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:45:27,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124560858] [2024-11-09 10:45:27,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:27,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:45:27,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:27,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:45:27,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:45:27,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124560858] [2024-11-09 10:45:27,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124560858] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:45:27,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222478223] [2024-11-09 10:45:27,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:27,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:45:27,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:45:27,591 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) [2024-11-09 10:45:27,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 10:45:27,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:27,686 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 10:45:27,688 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:45:27,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:45:27,907 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:45:27,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:45:27,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222478223] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:45:27,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:45:27,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2024-11-09 10:45:27,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270613818] [2024-11-09 10:45:27,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:45:27,973 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-09 10:45:27,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:45:27,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-09 10:45:27,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2024-11-09 10:45:28,157 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 105 [2024-11-09 10:45:28,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 185 transitions, 1518 flow. Second operand has 16 states, 16 states have (on average 64.5625) internal successors, (1033), 16 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:45:28,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:45:28,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 105 [2024-11-09 10:45:28,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:45:33,817 INFO L124 PetriNetUnfolderBase]: 28572/50427 cut-off events. [2024-11-09 10:45:33,818 INFO L125 PetriNetUnfolderBase]: For 78941/85491 co-relation queries the response was YES. [2024-11-09 10:45:34,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127189 conditions, 50427 events. 28572/50427 cut-off events. For 78941/85491 co-relation queries the response was YES. Maximal size of possible extension queue 1765. Compared 455468 event pairs, 12410 based on Foata normal form. 869/48745 useless extension candidates. Maximal degree in co-relation 125873. Up to 7563 conditions per place. [2024-11-09 10:45:34,327 INFO L140 encePairwiseOnDemand]: 93/105 looper letters, 425 selfloop transitions, 83 changer transitions 0/558 dead transitions. [2024-11-09 10:45:34,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 558 transitions, 4089 flow [2024-11-09 10:45:34,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-09 10:45:34,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-09 10:45:34,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2072 transitions. [2024-11-09 10:45:34,331 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7308641975308642 [2024-11-09 10:45:34,331 INFO L175 Difference]: Start difference. First operand has 207 places, 185 transitions, 1518 flow. Second operand 27 states and 2072 transitions. [2024-11-09 10:45:34,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 558 transitions, 4089 flow [2024-11-09 10:45:34,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 558 transitions, 4012 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:45:34,526 INFO L231 Difference]: Finished difference. Result has 236 places, 199 transitions, 1821 flow [2024-11-09 10:45:34,527 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=1455, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1821, PETRI_PLACES=236, PETRI_TRANSITIONS=199} [2024-11-09 10:45:34,527 INFO L277 CegarLoopForPetriNet]: 96 programPoint places, 140 predicate places. [2024-11-09 10:45:34,527 INFO L471 AbstractCegarLoop]: Abstraction has has 236 places, 199 transitions, 1821 flow [2024-11-09 10:45:34,528 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 64.5625) internal successors, (1033), 16 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:45:34,528 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:45:34,528 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:45:34,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-09 10:45:34,732 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,SelfDestructingSolverStorable23 [2024-11-09 10:45:34,733 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-09 10:45:34,733 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:45:34,733 INFO L85 PathProgramCache]: Analyzing trace with hash -421804490, now seen corresponding path program 2 times [2024-11-09 10:45:34,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:45:34,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705864385] [2024-11-09 10:45:34,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:34,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:45:34,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:35,049 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:45:35,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:45:35,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705864385] [2024-11-09 10:45:35,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705864385] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:45:35,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832206357] [2024-11-09 10:45:35,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:45:35,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:45:35,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:45:35,052 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) [2024-11-09 10:45:35,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 10:45:35,137 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:45:35,138 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:45:35,139 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-09 10:45:35,141 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:45:35,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2024-11-09 10:45:35,245 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 10:45:35,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-09 10:45:35,266 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-09 10:45:35,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-09 10:45:35,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:45:35,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-09 10:45:35,337 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:45:35,338 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 11 treesize of output 11 [2024-11-09 10:45:35,413 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:45:35,413 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:45:35,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 115 treesize of output 111 [2024-11-09 10:45:36,115 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:45:36,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832206357] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:45:36,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:45:36,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-09 10:45:36,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211117687] [2024-11-09 10:45:36,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:45:36,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 10:45:36,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:45:36,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 10:45:36,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2024-11-09 10:45:41,193 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 105 [2024-11-09 10:45:41,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 199 transitions, 1821 flow. Second operand has 20 states, 20 states have (on average 50.1) internal successors, (1002), 20 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:45:41,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:45:41,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 105 [2024-11-09 10:45:41,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:45:50,703 INFO L124 PetriNetUnfolderBase]: 43557/74200 cut-off events. [2024-11-09 10:45:50,703 INFO L125 PetriNetUnfolderBase]: For 107049/113792 co-relation queries the response was YES.