./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 8be7027f 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-wip.dk.perfect-tracechecks-8be7027-m [2024-11-12 16:20:42,412 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-12 16:20:42,456 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-12 16:20:42,462 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-12 16:20:42,464 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-12 16:20:42,490 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-12 16:20:42,491 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-12 16:20:42,491 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-12 16:20:42,492 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-12 16:20:42,492 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-12 16:20:42,493 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-12 16:20:42,494 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-12 16:20:42,494 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-12 16:20:42,494 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-12 16:20:42,496 INFO L153 SettingsManager]: * Use SBE=true [2024-11-12 16:20:42,496 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-12 16:20:42,496 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-12 16:20:42,497 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-12 16:20:42,497 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-12 16:20:42,497 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-12 16:20:42,497 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-12 16:20:42,498 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-12 16:20:42,500 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-12 16:20:42,501 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-12 16:20:42,501 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-12 16:20:42,501 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-12 16:20:42,501 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-12 16:20:42,502 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-12 16:20:42,502 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-12 16:20:42,502 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-12 16:20:42,502 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-12 16:20:42,502 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-12 16:20:42,503 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-12 16:20:42,503 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:20:42,503 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-12 16:20:42,503 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-12 16:20:42,503 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-12 16:20:42,504 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-12 16:20:42,504 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-12 16:20:42,504 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-12 16:20:42,504 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-12 16:20:42,505 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-12 16:20:42,506 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e7f1528a4c77969c5bff279724a3ed43475460be047e2e4b141f1353c3ea9cfe [2024-11-12 16:20:42,688 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-12 16:20:42,707 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-12 16:20:42,709 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-12 16:20:42,710 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-12 16:20:42,710 INFO L274 PluginConnector]: CDTParser initialized [2024-11-12 16:20:42,711 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/array-eq-trans.wvr.c [2024-11-12 16:20:44,020 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-12 16:20:44,248 INFO L384 CDTParser]: Found 1 translation units. [2024-11-12 16:20:44,249 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-trans.wvr.c [2024-11-12 16:20:44,255 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a7236936/a975073554794262b188568ec668c819/FLAGcc17ca0c2 [2024-11-12 16:20:44,633 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a7236936/a975073554794262b188568ec668c819 [2024-11-12 16:20:44,635 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-12 16:20:44,636 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-12 16:20:44,637 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-12 16:20:44,637 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-12 16:20:44,644 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-12 16:20:44,645 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:20:44" (1/1) ... [2024-11-12 16:20:44,645 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34573879 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:20:44, skipping insertion in model container [2024-11-12 16:20:44,646 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:20:44" (1/1) ... [2024-11-12 16:20:44,664 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-12 16:20:44,859 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-12 16:20:44,865 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:20:44,875 INFO L200 MainTranslator]: Completed pre-run [2024-11-12 16:20:44,903 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:20:44,919 INFO L204 MainTranslator]: Completed translation [2024-11-12 16:20:44,921 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:20:44 WrapperNode [2024-11-12 16:20:44,921 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-12 16:20:44,922 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-12 16:20:44,923 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-12 16:20:44,923 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-12 16:20:44,928 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:20:44" (1/1) ... [2024-11-12 16:20:44,934 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:20:44" (1/1) ... [2024-11-12 16:20:44,956 INFO L138 Inliner]: procedures = 23, calls = 32, calls flagged for inlining = 11, calls inlined = 15, statements flattened = 196 [2024-11-12 16:20:44,956 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-12 16:20:44,957 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-12 16:20:44,957 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-12 16:20:44,957 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-12 16:20:44,969 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:20:44" (1/1) ... [2024-11-12 16:20:44,969 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:20:44" (1/1) ... [2024-11-12 16:20:44,972 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:20:44" (1/1) ... [2024-11-12 16:20:44,985 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]. [2024-11-12 16:20:44,985 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:20:44" (1/1) ... [2024-11-12 16:20:44,986 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:20:44" (1/1) ... [2024-11-12 16:20:44,999 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:20:44" (1/1) ... [2024-11-12 16:20:45,006 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:20:44" (1/1) ... [2024-11-12 16:20:45,008 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:20:44" (1/1) ... [2024-11-12 16:20:45,012 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:20:44" (1/1) ... [2024-11-12 16:20:45,014 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-12 16:20:45,015 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-12 16:20:45,015 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-12 16:20:45,015 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-12 16:20:45,016 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:20:44" (1/1) ... [2024-11-12 16:20:45,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:20:45,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:20:45,057 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) [2024-11-12 16:20:45,059 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 [2024-11-12 16:20:45,091 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-12 16:20:45,091 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-12 16:20:45,091 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-12 16:20:45,091 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-12 16:20:45,092 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-12 16:20:45,092 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-12 16:20:45,092 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-12 16:20:45,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-12 16:20:45,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-12 16:20:45,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-12 16:20:45,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-12 16:20:45,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-12 16:20:45,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-12 16:20:45,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-12 16:20:45,095 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-12 16:20:45,095 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-12 16:20:45,096 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-12 16:20:45,231 INFO L238 CfgBuilder]: Building ICFG [2024-11-12 16:20:45,234 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-12 16:20:45,664 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-12 16:20:45,665 INFO L287 CfgBuilder]: Performing block encoding [2024-11-12 16:20:45,877 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-12 16:20:45,878 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-12 16:20:45,879 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:20:45 BoogieIcfgContainer [2024-11-12 16:20:45,879 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-12 16:20:45,881 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-12 16:20:45,881 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-12 16:20:45,884 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-12 16:20:45,884 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 04:20:44" (1/3) ... [2024-11-12 16:20:45,885 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3982f53d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:20:45, skipping insertion in model container [2024-11-12 16:20:45,885 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:20:44" (2/3) ... [2024-11-12 16:20:45,886 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3982f53d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:20:45, skipping insertion in model container [2024-11-12 16:20:45,886 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:20:45" (3/3) ... [2024-11-12 16:20:45,887 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-trans.wvr.c [2024-11-12 16:20:45,902 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-12 16:20:45,903 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2024-11-12 16:20:45,903 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-12 16:20:45,961 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-12 16:20:45,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 105 transitions, 231 flow [2024-11-12 16:20:46,038 INFO L124 PetriNetUnfolderBase]: 15/102 cut-off events. [2024-11-12 16:20:46,039 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-12 16:20:46,043 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. [2024-11-12 16:20:46,043 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 105 transitions, 231 flow [2024-11-12 16:20:46,048 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 101 transitions, 220 flow [2024-11-12 16:20:46,061 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 16:20:46,068 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;@4b5a9e53, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 16:20:46,069 INFO L334 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2024-11-12 16:20:46,072 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 16:20:46,072 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-12 16:20:46,072 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:20:46,072 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:20:46,073 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:20:46,073 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-12 16:20:46,079 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:20:46,080 INFO L85 PathProgramCache]: Analyzing trace with hash 769178, now seen corresponding path program 1 times [2024-11-12 16:20:46,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:20:46,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282901932] [2024-11-12 16:20:46,087 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:20:46,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:20:46,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:20:46,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:20:46,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:20:46,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282901932] [2024-11-12 16:20:46,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282901932] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:20:46,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:20:46,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:20:46,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745984206] [2024-11-12 16:20:46,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:20:46,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:20:46,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:20:46,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:20:46,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:20:46,528 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 105 [2024-11-12 16:20:46,530 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) [2024-11-12 16:20:46,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:20:46,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 105 [2024-11-12 16:20:46,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:20:46,701 INFO L124 PetriNetUnfolderBase]: 703/1193 cut-off events. [2024-11-12 16:20:46,702 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2024-11-12 16:20:46,706 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. [2024-11-12 16:20:46,716 INFO L140 encePairwiseOnDemand]: 99/105 looper letters, 38 selfloop transitions, 2 changer transitions 0/96 dead transitions. [2024-11-12 16:20:46,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 96 transitions, 290 flow [2024-11-12 16:20:46,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:20:46,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:20:46,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 224 transitions. [2024-11-12 16:20:46,730 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7111111111111111 [2024-11-12 16:20:46,732 INFO L175 Difference]: Start difference. First operand has 96 places, 101 transitions, 220 flow. Second operand 3 states and 224 transitions. [2024-11-12 16:20:46,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 96 transitions, 290 flow [2024-11-12 16:20:46,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 96 transitions, 278 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-12 16:20:46,742 INFO L231 Difference]: Finished difference. Result has 87 places, 96 transitions, 202 flow [2024-11-12 16:20:46,745 INFO L262 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} [2024-11-12 16:20:46,748 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, -9 predicate places. [2024-11-12 16:20:46,748 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 96 transitions, 202 flow [2024-11-12 16:20:46,749 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) [2024-11-12 16:20:46,749 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:20:46,749 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:20:46,750 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-12 16:20:46,750 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-12 16:20:46,750 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:20:46,750 INFO L85 PathProgramCache]: Analyzing trace with hash 769179, now seen corresponding path program 1 times [2024-11-12 16:20:46,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:20:46,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896464037] [2024-11-12 16:20:46,751 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:20:46,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:20:46,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:20:47,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:20:47,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:20:47,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896464037] [2024-11-12 16:20:47,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896464037] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:20:47,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:20:47,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:20:47,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586798649] [2024-11-12 16:20:47,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:20:47,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:20:47,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:20:47,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:20:47,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:20:47,194 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 105 [2024-11-12 16:20:47,194 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) [2024-11-12 16:20:47,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:20:47,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 105 [2024-11-12 16:20:47,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:20:47,350 INFO L124 PetriNetUnfolderBase]: 704/1196 cut-off events. [2024-11-12 16:20:47,350 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-11-12 16:20:47,353 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. [2024-11-12 16:20:47,358 INFO L140 encePairwiseOnDemand]: 100/105 looper letters, 42 selfloop transitions, 4 changer transitions 0/99 dead transitions. [2024-11-12 16:20:47,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 99 transitions, 300 flow [2024-11-12 16:20:47,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:20:47,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:20:47,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 287 transitions. [2024-11-12 16:20:47,360 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6833333333333333 [2024-11-12 16:20:47,361 INFO L175 Difference]: Start difference. First operand has 87 places, 96 transitions, 202 flow. Second operand 4 states and 287 transitions. [2024-11-12 16:20:47,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 99 transitions, 300 flow [2024-11-12 16:20:47,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 99 transitions, 296 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:20:47,363 INFO L231 Difference]: Finished difference. Result has 90 places, 99 transitions, 225 flow [2024-11-12 16:20:47,363 INFO L262 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} [2024-11-12 16:20:47,364 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, -6 predicate places. [2024-11-12 16:20:47,364 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 99 transitions, 225 flow [2024-11-12 16:20:47,364 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) [2024-11-12 16:20:47,364 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:20:47,364 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-12 16:20:47,364 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-12 16:20:47,364 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-12 16:20:47,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:20:47,365 INFO L85 PathProgramCache]: Analyzing trace with hash 23844803, now seen corresponding path program 1 times [2024-11-12 16:20:47,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:20:47,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982631239] [2024-11-12 16:20:47,365 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:20:47,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:20:47,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:20:47,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:20:47,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:20:47,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982631239] [2024-11-12 16:20:47,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982631239] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:20:47,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:20:47,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:20:47,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32358120] [2024-11-12 16:20:47,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:20:47,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:20:47,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:20:47,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:20:47,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:20:47,735 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 105 [2024-11-12 16:20:47,736 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) [2024-11-12 16:20:47,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:20:47,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 105 [2024-11-12 16:20:47,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:20:47,898 INFO L124 PetriNetUnfolderBase]: 705/1199 cut-off events. [2024-11-12 16:20:47,898 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-11-12 16:20:47,901 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. [2024-11-12 16:20:47,906 INFO L140 encePairwiseOnDemand]: 97/105 looper letters, 42 selfloop transitions, 7 changer transitions 0/102 dead transitions. [2024-11-12 16:20:47,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 102 transitions, 329 flow [2024-11-12 16:20:47,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:20:47,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:20:47,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 350 transitions. [2024-11-12 16:20:47,908 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-12 16:20:47,908 INFO L175 Difference]: Start difference. First operand has 90 places, 99 transitions, 225 flow. Second operand 5 states and 350 transitions. [2024-11-12 16:20:47,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 102 transitions, 329 flow [2024-11-12 16:20:47,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 102 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:20:47,910 INFO L231 Difference]: Finished difference. Result has 95 places, 102 transitions, 259 flow [2024-11-12 16:20:47,910 INFO L262 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} [2024-11-12 16:20:47,911 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, -1 predicate places. [2024-11-12 16:20:47,911 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 102 transitions, 259 flow [2024-11-12 16:20:47,911 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) [2024-11-12 16:20:47,911 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:20:47,911 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-12 16:20:47,911 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-12 16:20:47,912 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-12 16:20:47,912 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:20:47,912 INFO L85 PathProgramCache]: Analyzing trace with hash 739205423, now seen corresponding path program 1 times [2024-11-12 16:20:47,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:20:47,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106937178] [2024-11-12 16:20:47,912 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:20:47,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:20:47,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:20:48,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:20:48,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:20:48,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106937178] [2024-11-12 16:20:48,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106937178] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:20:48,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503102276] [2024-11-12 16:20:48,037 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:20:48,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:20:48,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:20:48,039 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) [2024-11-12 16:20:48,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-12 16:20:48,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:20:48,094 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-12 16:20:48,097 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:20:48,145 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 [2024-11-12 16:20:48,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:20:48,243 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:20:48,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:20:48,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503102276] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:20:48,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:20:48,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-12 16:20:48,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433073405] [2024-11-12 16:20:48,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:20:48,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-12 16:20:48,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:20:48,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-12 16:20:48,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-12 16:20:48,725 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 105 [2024-11-12 16:20:48,726 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) [2024-11-12 16:20:48,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:20:48,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 105 [2024-11-12 16:20:48,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:20:49,002 INFO L124 PetriNetUnfolderBase]: 706/1201 cut-off events. [2024-11-12 16:20:49,002 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-12 16:20:49,004 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. [2024-11-12 16:20:49,010 INFO L140 encePairwiseOnDemand]: 100/105 looper letters, 41 selfloop transitions, 10 changer transitions 0/104 dead transitions. [2024-11-12 16:20:49,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 104 transitions, 372 flow [2024-11-12 16:20:49,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-12 16:20:49,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-12 16:20:49,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 530 transitions. [2024-11-12 16:20:49,012 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-11-12 16:20:49,012 INFO L175 Difference]: Start difference. First operand has 95 places, 102 transitions, 259 flow. Second operand 8 states and 530 transitions. [2024-11-12 16:20:49,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 104 transitions, 372 flow [2024-11-12 16:20:49,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 104 transitions, 371 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:20:49,015 INFO L231 Difference]: Finished difference. Result has 100 places, 104 transitions, 289 flow [2024-11-12 16:20:49,015 INFO L262 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} [2024-11-12 16:20:49,016 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, 4 predicate places. [2024-11-12 16:20:49,016 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 104 transitions, 289 flow [2024-11-12 16:20:49,016 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) [2024-11-12 16:20:49,017 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:20:49,017 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-12 16:20:49,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-12 16:20:49,218 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 [2024-11-12 16:20:49,218 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-12 16:20:49,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:20:49,219 INFO L85 PathProgramCache]: Analyzing trace with hash 739190331, now seen corresponding path program 1 times [2024-11-12 16:20:49,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:20:49,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292459071] [2024-11-12 16:20:49,219 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:20:49,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:20:49,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:20:49,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:20:49,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:20:49,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292459071] [2024-11-12 16:20:49,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292459071] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:20:49,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:20:49,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:20:49,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224462510] [2024-11-12 16:20:49,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:20:49,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:20:49,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:20:49,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:20:49,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:20:49,511 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 105 [2024-11-12 16:20:49,511 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) [2024-11-12 16:20:49,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:20:49,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 105 [2024-11-12 16:20:49,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:20:49,711 INFO L124 PetriNetUnfolderBase]: 707/1204 cut-off events. [2024-11-12 16:20:49,711 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-12 16:20:49,713 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. [2024-11-12 16:20:49,720 INFO L140 encePairwiseOnDemand]: 96/105 looper letters, 45 selfloop transitions, 9 changer transitions 0/107 dead transitions. [2024-11-12 16:20:49,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 107 transitions, 403 flow [2024-11-12 16:20:49,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:20:49,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:20:49,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 349 transitions. [2024-11-12 16:20:49,721 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6647619047619048 [2024-11-12 16:20:49,721 INFO L175 Difference]: Start difference. First operand has 100 places, 104 transitions, 289 flow. Second operand 5 states and 349 transitions. [2024-11-12 16:20:49,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 107 transitions, 403 flow [2024-11-12 16:20:49,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 107 transitions, 356 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-11-12 16:20:49,724 INFO L231 Difference]: Finished difference. Result has 98 places, 107 transitions, 285 flow [2024-11-12 16:20:49,724 INFO L262 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} [2024-11-12 16:20:49,725 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, 2 predicate places. [2024-11-12 16:20:49,725 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 107 transitions, 285 flow [2024-11-12 16:20:49,725 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) [2024-11-12 16:20:49,725 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:20:49,726 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-12 16:20:49,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-12 16:20:49,726 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-12 16:20:49,726 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:20:49,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1440043699, now seen corresponding path program 1 times [2024-11-12 16:20:49,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:20:49,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125345737] [2024-11-12 16:20:49,727 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:20:49,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:20:49,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:20:49,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:20:49,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:20:49,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125345737] [2024-11-12 16:20:49,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125345737] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:20:49,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051289996] [2024-11-12 16:20:49,852 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:20:49,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:20:49,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:20:49,854 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) [2024-11-12 16:20:49,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-12 16:20:49,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:20:49,916 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-12 16:20:49,917 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:20:49,934 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 [2024-11-12 16:20:50,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:20:50,072 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:20:50,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:20:50,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051289996] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:20:50,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:20:50,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-12 16:20:50,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398135268] [2024-11-12 16:20:50,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:20:50,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-12 16:20:50,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:20:50,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-12 16:20:50,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-12 16:20:51,310 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 105 [2024-11-12 16:20:51,311 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) [2024-11-12 16:20:51,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:20:51,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 105 [2024-11-12 16:20:51,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:20:51,644 INFO L124 PetriNetUnfolderBase]: 800/1395 cut-off events. [2024-11-12 16:20:51,644 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-11-12 16:20:51,646 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. [2024-11-12 16:20:51,652 INFO L140 encePairwiseOnDemand]: 97/105 looper letters, 39 selfloop transitions, 18 changer transitions 0/109 dead transitions. [2024-11-12 16:20:51,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 109 transitions, 410 flow [2024-11-12 16:20:51,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-12 16:20:51,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-12 16:20:51,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 587 transitions. [2024-11-12 16:20:51,654 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6211640211640211 [2024-11-12 16:20:51,654 INFO L175 Difference]: Start difference. First operand has 98 places, 107 transitions, 285 flow. Second operand 9 states and 587 transitions. [2024-11-12 16:20:51,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 109 transitions, 410 flow [2024-11-12 16:20:51,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 109 transitions, 402 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:20:51,657 INFO L231 Difference]: Finished difference. Result has 103 places, 109 transitions, 324 flow [2024-11-12 16:20:51,657 INFO L262 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} [2024-11-12 16:20:51,658 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, 7 predicate places. [2024-11-12 16:20:51,658 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 109 transitions, 324 flow [2024-11-12 16:20:51,658 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) [2024-11-12 16:20:51,658 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:20:51,659 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-12 16:20:51,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-12 16:20:51,864 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 [2024-11-12 16:20:51,865 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-12 16:20:51,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:20:51,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1692327978, now seen corresponding path program 1 times [2024-11-12 16:20:51,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:20:51,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590655368] [2024-11-12 16:20:51,866 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:20:51,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:20:51,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:20:52,045 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:20:52,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:20:52,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590655368] [2024-11-12 16:20:52,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590655368] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:20:52,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667671919] [2024-11-12 16:20:52,046 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:20:52,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:20:52,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:20:52,050 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) [2024-11-12 16:20:52,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-12 16:20:52,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:20:52,117 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-12 16:20:52,118 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:20:52,129 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 [2024-11-12 16:20:52,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:20:52,249 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:20:52,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:20:52,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667671919] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:20:52,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:20:52,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-12 16:20:52,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067165421] [2024-11-12 16:20:52,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:20:52,415 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-12 16:20:52,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:20:52,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-12 16:20:52,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-12 16:20:53,156 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 105 [2024-11-12 16:20:53,157 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) [2024-11-12 16:20:53,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:20:53,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 105 [2024-11-12 16:20:53,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:20:53,512 INFO L124 PetriNetUnfolderBase]: 708/1205 cut-off events. [2024-11-12 16:20:53,512 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-11-12 16:20:53,514 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. [2024-11-12 16:20:53,519 INFO L140 encePairwiseOnDemand]: 96/105 looper letters, 36 selfloop transitions, 19 changer transitions 0/108 dead transitions. [2024-11-12 16:20:53,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 108 transitions, 430 flow [2024-11-12 16:20:53,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 16:20:53,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-12 16:20:53,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 467 transitions. [2024-11-12 16:20:53,521 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6353741496598639 [2024-11-12 16:20:53,521 INFO L175 Difference]: Start difference. First operand has 103 places, 109 transitions, 324 flow. Second operand 7 states and 467 transitions. [2024-11-12 16:20:53,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 108 transitions, 430 flow [2024-11-12 16:20:53,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 108 transitions, 397 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-12 16:20:53,523 INFO L231 Difference]: Finished difference. Result has 103 places, 108 transitions, 325 flow [2024-11-12 16:20:53,523 INFO L262 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} [2024-11-12 16:20:53,523 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, 7 predicate places. [2024-11-12 16:20:53,524 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 108 transitions, 325 flow [2024-11-12 16:20:53,524 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) [2024-11-12 16:20:53,524 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:20:53,524 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:20:53,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-12 16:20:53,725 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 [2024-11-12 16:20:53,725 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-12 16:20:53,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:20:53,727 INFO L85 PathProgramCache]: Analyzing trace with hash 926078392, now seen corresponding path program 1 times [2024-11-12 16:20:53,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:20:53,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089007479] [2024-11-12 16:20:53,728 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:20:53,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:20:53,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:20:53,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:20:53,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:20:53,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089007479] [2024-11-12 16:20:53,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089007479] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:20:53,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:20:53,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:20:53,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897861996] [2024-11-12 16:20:53,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:20:53,772 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:20:53,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:20:53,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:20:53,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:20:53,799 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 105 [2024-11-12 16:20:53,800 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) [2024-11-12 16:20:53,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:20:53,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 105 [2024-11-12 16:20:53,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:20:54,000 INFO L124 PetriNetUnfolderBase]: 1226/2193 cut-off events. [2024-11-12 16:20:54,001 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-11-12 16:20:54,003 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. [2024-11-12 16:20:54,018 INFO L140 encePairwiseOnDemand]: 97/105 looper letters, 91 selfloop transitions, 8 changer transitions 0/151 dead transitions. [2024-11-12 16:20:54,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 151 transitions, 671 flow [2024-11-12 16:20:54,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:20:54,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:20:54,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 395 transitions. [2024-11-12 16:20:54,020 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7523809523809524 [2024-11-12 16:20:54,020 INFO L175 Difference]: Start difference. First operand has 103 places, 108 transitions, 325 flow. Second operand 5 states and 395 transitions. [2024-11-12 16:20:54,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 151 transitions, 671 flow [2024-11-12 16:20:54,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 151 transitions, 607 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-11-12 16:20:54,023 INFO L231 Difference]: Finished difference. Result has 103 places, 113 transitions, 346 flow [2024-11-12 16:20:54,024 INFO L262 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} [2024-11-12 16:20:54,026 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, 7 predicate places. [2024-11-12 16:20:54,026 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 113 transitions, 346 flow [2024-11-12 16:20:54,027 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) [2024-11-12 16:20:54,027 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:20:54,027 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:20:54,027 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-12 16:20:54,027 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-12 16:20:54,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:20:54,028 INFO L85 PathProgramCache]: Analyzing trace with hash -329060956, now seen corresponding path program 1 times [2024-11-12 16:20:54,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:20:54,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326675487] [2024-11-12 16:20:54,029 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:20:54,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:20:54,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:20:54,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:20:54,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:20:54,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326675487] [2024-11-12 16:20:54,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326675487] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:20:54,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:20:54,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 16:20:54,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824833285] [2024-11-12 16:20:54,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:20:54,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:20:54,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:20:54,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:20:54,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:20:54,141 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 105 [2024-11-12 16:20:54,142 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) [2024-11-12 16:20:54,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:20:54,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 105 [2024-11-12 16:20:54,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:20:54,494 INFO L124 PetriNetUnfolderBase]: 2626/4724 cut-off events. [2024-11-12 16:20:54,494 INFO L125 PetriNetUnfolderBase]: For 119/119 co-relation queries the response was YES. [2024-11-12 16:20:54,499 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. [2024-11-12 16:20:54,516 INFO L140 encePairwiseOnDemand]: 97/105 looper letters, 115 selfloop transitions, 12 changer transitions 0/179 dead transitions. [2024-11-12 16:20:54,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 179 transitions, 770 flow [2024-11-12 16:20:54,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 16:20:54,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 16:20:54,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 481 transitions. [2024-11-12 16:20:54,518 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7634920634920634 [2024-11-12 16:20:54,519 INFO L175 Difference]: Start difference. First operand has 103 places, 113 transitions, 346 flow. Second operand 6 states and 481 transitions. [2024-11-12 16:20:54,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 179 transitions, 770 flow [2024-11-12 16:20:54,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 179 transitions, 765 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:20:54,522 INFO L231 Difference]: Finished difference. Result has 109 places, 118 transitions, 421 flow [2024-11-12 16:20:54,522 INFO L262 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} [2024-11-12 16:20:54,523 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, 13 predicate places. [2024-11-12 16:20:54,523 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 118 transitions, 421 flow [2024-11-12 16:20:54,523 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) [2024-11-12 16:20:54,523 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:20:54,523 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:20:54,523 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-12 16:20:54,524 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-12 16:20:54,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:20:54,524 INFO L85 PathProgramCache]: Analyzing trace with hash 827618090, now seen corresponding path program 1 times [2024-11-12 16:20:54,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:20:54,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928445095] [2024-11-12 16:20:54,524 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:20:54,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:20:54,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:20:54,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:20:54,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:20:54,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928445095] [2024-11-12 16:20:54,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928445095] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:20:54,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:20:54,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 16:20:54,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921506911] [2024-11-12 16:20:54,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:20:54,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:20:54,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:20:54,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:20:54,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:20:54,602 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 105 [2024-11-12 16:20:54,602 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) [2024-11-12 16:20:54,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:20:54,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 105 [2024-11-12 16:20:54,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:20:54,989 INFO L124 PetriNetUnfolderBase]: 3124/5898 cut-off events. [2024-11-12 16:20:54,989 INFO L125 PetriNetUnfolderBase]: For 274/274 co-relation queries the response was YES. [2024-11-12 16:20:54,994 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. [2024-11-12 16:20:55,010 INFO L140 encePairwiseOnDemand]: 97/105 looper letters, 113 selfloop transitions, 12 changer transitions 0/177 dead transitions. [2024-11-12 16:20:55,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 177 transitions, 811 flow [2024-11-12 16:20:55,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 16:20:55,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 16:20:55,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 477 transitions. [2024-11-12 16:20:55,012 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7571428571428571 [2024-11-12 16:20:55,012 INFO L175 Difference]: Start difference. First operand has 109 places, 118 transitions, 421 flow. Second operand 6 states and 477 transitions. [2024-11-12 16:20:55,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 177 transitions, 811 flow [2024-11-12 16:20:55,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 177 transitions, 808 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:20:55,016 INFO L231 Difference]: Finished difference. Result has 115 places, 119 transitions, 460 flow [2024-11-12 16:20:55,017 INFO L262 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} [2024-11-12 16:20:55,018 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, 19 predicate places. [2024-11-12 16:20:55,018 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 119 transitions, 460 flow [2024-11-12 16:20:55,019 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) [2024-11-12 16:20:55,019 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:20:55,019 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:20:55,019 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-12 16:20:55,019 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-12 16:20:55,019 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:20:55,019 INFO L85 PathProgramCache]: Analyzing trace with hash 487531924, now seen corresponding path program 1 times [2024-11-12 16:20:55,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:20:55,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637907390] [2024-11-12 16:20:55,019 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:20:55,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:20:55,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:20:55,144 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:20:55,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:20:55,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637907390] [2024-11-12 16:20:55,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637907390] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:20:55,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:20:55,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:20:55,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967871542] [2024-11-12 16:20:55,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:20:55,144 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:20:55,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:20:55,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:20:55,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:20:55,212 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 105 [2024-11-12 16:20:55,212 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) [2024-11-12 16:20:55,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:20:55,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 105 [2024-11-12 16:20:55,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:20:55,574 INFO L124 PetriNetUnfolderBase]: 3203/5333 cut-off events. [2024-11-12 16:20:55,574 INFO L125 PetriNetUnfolderBase]: For 564/564 co-relation queries the response was YES. [2024-11-12 16:20:55,579 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. [2024-11-12 16:20:55,593 INFO L140 encePairwiseOnDemand]: 98/105 looper letters, 61 selfloop transitions, 9 changer transitions 0/115 dead transitions. [2024-11-12 16:20:55,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 115 transitions, 592 flow [2024-11-12 16:20:55,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:20:55,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:20:55,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 308 transitions. [2024-11-12 16:20:55,594 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5866666666666667 [2024-11-12 16:20:55,594 INFO L175 Difference]: Start difference. First operand has 115 places, 119 transitions, 460 flow. Second operand 5 states and 308 transitions. [2024-11-12 16:20:55,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 115 transitions, 592 flow [2024-11-12 16:20:55,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 115 transitions, 579 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:20:55,598 INFO L231 Difference]: Finished difference. Result has 112 places, 115 transitions, 457 flow [2024-11-12 16:20:55,599 INFO L262 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} [2024-11-12 16:20:55,599 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, 16 predicate places. [2024-11-12 16:20:55,601 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 115 transitions, 457 flow [2024-11-12 16:20:55,601 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) [2024-11-12 16:20:55,601 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:20:55,601 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:20:55,601 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-12 16:20:55,601 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-12 16:20:55,601 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:20:55,601 INFO L85 PathProgramCache]: Analyzing trace with hash 747044510, now seen corresponding path program 1 times [2024-11-12 16:20:55,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:20:55,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982948316] [2024-11-12 16:20:55,602 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:20:55,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:20:55,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:20:55,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:20:55,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:20:55,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982948316] [2024-11-12 16:20:55,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982948316] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:20:55,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:20:55,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:20:55,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405240403] [2024-11-12 16:20:55,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:20:55,655 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:20:55,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:20:55,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:20:55,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:20:55,684 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 105 [2024-11-12 16:20:55,684 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) [2024-11-12 16:20:55,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:20:55,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 105 [2024-11-12 16:20:55,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:20:55,920 INFO L124 PetriNetUnfolderBase]: 2340/3823 cut-off events. [2024-11-12 16:20:55,920 INFO L125 PetriNetUnfolderBase]: For 452/452 co-relation queries the response was YES. [2024-11-12 16:20:55,926 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. [2024-11-12 16:20:55,938 INFO L140 encePairwiseOnDemand]: 97/105 looper letters, 94 selfloop transitions, 10 changer transitions 0/152 dead transitions. [2024-11-12 16:20:55,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 152 transitions, 774 flow [2024-11-12 16:20:55,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:20:55,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:20:55,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 393 transitions. [2024-11-12 16:20:55,939 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7485714285714286 [2024-11-12 16:20:55,939 INFO L175 Difference]: Start difference. First operand has 112 places, 115 transitions, 457 flow. Second operand 5 states and 393 transitions. [2024-11-12 16:20:55,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 152 transitions, 774 flow [2024-11-12 16:20:55,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 152 transitions, 760 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:20:55,942 INFO L231 Difference]: Finished difference. Result has 114 places, 115 transitions, 473 flow [2024-11-12 16:20:55,943 INFO L262 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} [2024-11-12 16:20:55,943 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, 18 predicate places. [2024-11-12 16:20:55,943 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 115 transitions, 473 flow [2024-11-12 16:20:55,943 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) [2024-11-12 16:20:55,944 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:20:55,944 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:20:55,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-12 16:20:55,944 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-12 16:20:55,944 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:20:55,944 INFO L85 PathProgramCache]: Analyzing trace with hash 588380698, now seen corresponding path program 1 times [2024-11-12 16:20:55,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:20:55,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161340974] [2024-11-12 16:20:55,944 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:20:55,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:20:55,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:20:56,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:20:56,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:20:56,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161340974] [2024-11-12 16:20:56,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161340974] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:20:56,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:20:56,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 16:20:56,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918323236] [2024-11-12 16:20:56,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:20:56,045 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:20:56,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:20:56,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:20:56,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:20:56,076 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 105 [2024-11-12 16:20:56,077 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) [2024-11-12 16:20:56,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:20:56,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 105 [2024-11-12 16:20:56,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:20:56,599 INFO L124 PetriNetUnfolderBase]: 3767/7062 cut-off events. [2024-11-12 16:20:56,599 INFO L125 PetriNetUnfolderBase]: For 784/784 co-relation queries the response was YES. [2024-11-12 16:20:56,609 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. [2024-11-12 16:20:56,626 INFO L140 encePairwiseOnDemand]: 99/105 looper letters, 109 selfloop transitions, 15 changer transitions 0/172 dead transitions. [2024-11-12 16:20:56,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 172 transitions, 855 flow [2024-11-12 16:20:56,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:20:56,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:20:56,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 411 transitions. [2024-11-12 16:20:56,628 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7828571428571428 [2024-11-12 16:20:56,628 INFO L175 Difference]: Start difference. First operand has 114 places, 115 transitions, 473 flow. Second operand 5 states and 411 transitions. [2024-11-12 16:20:56,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 172 transitions, 855 flow [2024-11-12 16:20:56,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 172 transitions, 835 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-12 16:20:56,632 INFO L231 Difference]: Finished difference. Result has 115 places, 115 transitions, 489 flow [2024-11-12 16:20:56,633 INFO L262 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} [2024-11-12 16:20:56,633 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, 19 predicate places. [2024-11-12 16:20:56,634 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 115 transitions, 489 flow [2024-11-12 16:20:56,634 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) [2024-11-12 16:20:56,634 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:20:56,634 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:20:56,634 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-12 16:20:56,634 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-12 16:20:56,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:20:56,635 INFO L85 PathProgramCache]: Analyzing trace with hash 487531925, now seen corresponding path program 1 times [2024-11-12 16:20:56,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:20:56,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784028949] [2024-11-12 16:20:56,635 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:20:56,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:20:56,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:20:56,893 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:20:56,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:20:56,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784028949] [2024-11-12 16:20:56,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784028949] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:20:56,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427729059] [2024-11-12 16:20:56,894 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:20:56,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:20:56,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:20:56,895 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) [2024-11-12 16:20:56,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-12 16:20:56,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:20:56,959 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-12 16:20:56,961 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:20:56,967 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 [2024-11-12 16:20:57,028 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-12 16:20:57,028 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 [2024-11-12 16:20:57,032 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 [2024-11-12 16:20:57,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 16:20:57,082 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 [2024-11-12 16:20:57,089 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:20:57,089 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 [2024-11-12 16:20:57,120 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:20:57,120 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:20:57,315 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 [2024-11-12 16:20:57,472 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:20:57,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427729059] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:20:57,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:20:57,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-11-12 16:20:57,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588708449] [2024-11-12 16:20:57,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:20:57,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-12 16:20:57,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:20:57,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-12 16:20:57,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2024-11-12 16:20:59,931 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] [2024-11-12 16:21:01,775 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 105 [2024-11-12 16:21:01,776 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) [2024-11-12 16:21:01,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:21:01,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 105 [2024-11-12 16:21:01,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:21:02,721 INFO L124 PetriNetUnfolderBase]: 5081/8939 cut-off events. [2024-11-12 16:21:02,721 INFO L125 PetriNetUnfolderBase]: For 1091/1091 co-relation queries the response was YES. [2024-11-12 16:21:02,733 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. [2024-11-12 16:21:02,757 INFO L140 encePairwiseOnDemand]: 93/105 looper letters, 121 selfloop transitions, 24 changer transitions 0/188 dead transitions. [2024-11-12 16:21:02,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 188 transitions, 974 flow [2024-11-12 16:21:02,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-12 16:21:02,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-12 16:21:02,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 532 transitions. [2024-11-12 16:21:02,759 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-11-12 16:21:02,759 INFO L175 Difference]: Start difference. First operand has 115 places, 115 transitions, 489 flow. Second operand 8 states and 532 transitions. [2024-11-12 16:21:02,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 188 transitions, 974 flow [2024-11-12 16:21:02,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 188 transitions, 970 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:21:02,762 INFO L231 Difference]: Finished difference. Result has 124 places, 118 transitions, 568 flow [2024-11-12 16:21:02,763 INFO L262 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} [2024-11-12 16:21:02,763 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, 28 predicate places. [2024-11-12 16:21:02,763 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 118 transitions, 568 flow [2024-11-12 16:21:02,763 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) [2024-11-12 16:21:02,763 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:21:02,763 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:21:02,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-12 16:21:02,965 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 [2024-11-12 16:21:02,965 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-12 16:21:02,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:21:02,966 INFO L85 PathProgramCache]: Analyzing trace with hash -2066378759, now seen corresponding path program 1 times [2024-11-12 16:21:02,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:21:02,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067110645] [2024-11-12 16:21:02,966 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:21:02,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:21:02,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:21:03,030 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:21:03,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:21:03,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067110645] [2024-11-12 16:21:03,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067110645] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:21:03,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:21:03,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:21:03,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254560084] [2024-11-12 16:21:03,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:21:03,031 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:21:03,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:21:03,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:21:03,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:21:03,068 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 105 [2024-11-12 16:21:03,069 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) [2024-11-12 16:21:03,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:21:03,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 105 [2024-11-12 16:21:03,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:21:03,539 INFO L124 PetriNetUnfolderBase]: 5217/9022 cut-off events. [2024-11-12 16:21:03,539 INFO L125 PetriNetUnfolderBase]: For 1995/1995 co-relation queries the response was YES. [2024-11-12 16:21:03,554 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. [2024-11-12 16:21:03,578 INFO L140 encePairwiseOnDemand]: 98/105 looper letters, 58 selfloop transitions, 12 changer transitions 0/114 dead transitions. [2024-11-12 16:21:03,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 114 transitions, 700 flow [2024-11-12 16:21:03,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:21:03,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:21:03,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 312 transitions. [2024-11-12 16:21:03,583 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5942857142857143 [2024-11-12 16:21:03,583 INFO L175 Difference]: Start difference. First operand has 124 places, 118 transitions, 568 flow. Second operand 5 states and 312 transitions. [2024-11-12 16:21:03,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 114 transitions, 700 flow [2024-11-12 16:21:03,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 114 transitions, 669 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-11-12 16:21:03,590 INFO L231 Difference]: Finished difference. Result has 122 places, 114 transitions, 553 flow [2024-11-12 16:21:03,591 INFO L262 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} [2024-11-12 16:21:03,591 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, 26 predicate places. [2024-11-12 16:21:03,591 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 114 transitions, 553 flow [2024-11-12 16:21:03,591 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) [2024-11-12 16:21:03,591 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:21:03,591 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:21:03,591 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-12 16:21:03,591 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-12 16:21:03,592 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:21:03,592 INFO L85 PathProgramCache]: Analyzing trace with hash -2066378758, now seen corresponding path program 1 times [2024-11-12 16:21:03,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:21:03,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840916407] [2024-11-12 16:21:03,592 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:21:03,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:21:03,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:21:03,753 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:21:03,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:21:03,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840916407] [2024-11-12 16:21:03,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840916407] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:21:03,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369820323] [2024-11-12 16:21:03,753 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:21:03,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:21:03,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:21:03,757 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) [2024-11-12 16:21:03,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-12 16:21:03,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:21:03,818 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-12 16:21:03,823 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:21:03,834 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 [2024-11-12 16:21:03,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 16:21:03,878 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 [2024-11-12 16:21:03,883 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:21:03,884 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 [2024-11-12 16:21:03,923 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:21:03,923 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:21:03,989 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 [2024-11-12 16:21:04,051 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 16:21:04,051 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 [2024-11-12 16:21:04,078 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:21:04,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369820323] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:21:04,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:21:04,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-12 16:21:04,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412603349] [2024-11-12 16:21:04,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:21:04,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-12 16:21:04,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:21:04,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-12 16:21:04,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-11-12 16:21:04,893 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 105 [2024-11-12 16:21:04,894 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) [2024-11-12 16:21:04,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:21:04,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 105 [2024-11-12 16:21:04,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:21:05,725 INFO L124 PetriNetUnfolderBase]: 4746/8195 cut-off events. [2024-11-12 16:21:05,725 INFO L125 PetriNetUnfolderBase]: For 1768/1768 co-relation queries the response was YES. [2024-11-12 16:21:05,734 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. [2024-11-12 16:21:05,766 INFO L140 encePairwiseOnDemand]: 93/105 looper letters, 139 selfloop transitions, 27 changer transitions 0/210 dead transitions. [2024-11-12 16:21:05,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 210 transitions, 1123 flow [2024-11-12 16:21:05,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-12 16:21:05,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-12 16:21:05,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 721 transitions. [2024-11-12 16:21:05,772 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6866666666666666 [2024-11-12 16:21:05,773 INFO L175 Difference]: Start difference. First operand has 122 places, 114 transitions, 553 flow. Second operand 10 states and 721 transitions. [2024-11-12 16:21:05,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 210 transitions, 1123 flow [2024-11-12 16:21:05,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 210 transitions, 1103 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:21:05,784 INFO L231 Difference]: Finished difference. Result has 132 places, 119 transitions, 641 flow [2024-11-12 16:21:05,784 INFO L262 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} [2024-11-12 16:21:05,785 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, 36 predicate places. [2024-11-12 16:21:05,785 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 119 transitions, 641 flow [2024-11-12 16:21:05,785 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) [2024-11-12 16:21:05,785 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:21:05,785 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:21:05,798 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-12 16:21:05,986 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 [2024-11-12 16:21:05,986 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-12 16:21:05,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:21:05,986 INFO L85 PathProgramCache]: Analyzing trace with hash 449921162, now seen corresponding path program 1 times [2024-11-12 16:21:05,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:21:05,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301943220] [2024-11-12 16:21:05,987 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:21:05,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:21:06,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:21:06,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:21:06,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:21:06,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301943220] [2024-11-12 16:21:06,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301943220] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:21:06,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:21:06,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 16:21:06,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509751780] [2024-11-12 16:21:06,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:21:06,052 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:21:06,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:21:06,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:21:06,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:21:06,120 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 105 [2024-11-12 16:21:06,120 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) [2024-11-12 16:21:06,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:21:06,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 105 [2024-11-12 16:21:06,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:21:06,531 INFO L124 PetriNetUnfolderBase]: 3640/6278 cut-off events. [2024-11-12 16:21:06,531 INFO L125 PetriNetUnfolderBase]: For 4498/4670 co-relation queries the response was YES. [2024-11-12 16:21:06,543 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. [2024-11-12 16:21:06,562 INFO L140 encePairwiseOnDemand]: 100/105 looper letters, 87 selfloop transitions, 14 changer transitions 0/148 dead transitions. [2024-11-12 16:21:06,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 148 transitions, 938 flow [2024-11-12 16:21:06,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:21:06,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:21:06,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 381 transitions. [2024-11-12 16:21:06,568 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7257142857142858 [2024-11-12 16:21:06,568 INFO L175 Difference]: Start difference. First operand has 132 places, 119 transitions, 641 flow. Second operand 5 states and 381 transitions. [2024-11-12 16:21:06,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 148 transitions, 938 flow [2024-11-12 16:21:06,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 148 transitions, 878 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-11-12 16:21:06,574 INFO L231 Difference]: Finished difference. Result has 131 places, 119 transitions, 620 flow [2024-11-12 16:21:06,574 INFO L262 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} [2024-11-12 16:21:06,575 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, 35 predicate places. [2024-11-12 16:21:06,575 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 119 transitions, 620 flow [2024-11-12 16:21:06,575 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) [2024-11-12 16:21:06,575 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:21:06,575 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:21:06,575 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-12 16:21:06,575 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-12 16:21:06,576 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:21:06,576 INFO L85 PathProgramCache]: Analyzing trace with hash -490856052, now seen corresponding path program 1 times [2024-11-12 16:21:06,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:21:06,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979787730] [2024-11-12 16:21:06,576 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:21:06,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:21:06,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:21:06,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:21:06,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:21:06,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979787730] [2024-11-12 16:21:06,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979787730] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:21:06,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925249893] [2024-11-12 16:21:06,747 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:21:06,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:21:06,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:21:06,751 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) [2024-11-12 16:21:06,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-12 16:21:06,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:21:06,828 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-12 16:21:06,830 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:21:06,843 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 [2024-11-12 16:21:06,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 16:21:06,894 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 [2024-11-12 16:21:06,904 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:21:06,904 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 [2024-11-12 16:21:06,961 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:21:06,961 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:21:07,052 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 [2024-11-12 16:21:07,119 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 16:21:07,120 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 [2024-11-12 16:21:07,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:21:07,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925249893] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:21:07,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:21:07,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-12 16:21:07,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792039093] [2024-11-12 16:21:07,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:21:07,142 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-12 16:21:07,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:21:07,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-12 16:21:07,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-11-12 16:21:07,882 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 105 [2024-11-12 16:21:07,883 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) [2024-11-12 16:21:07,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:21:07,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 105 [2024-11-12 16:21:07,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:21:08,928 INFO L124 PetriNetUnfolderBase]: 5024/9031 cut-off events. [2024-11-12 16:21:08,928 INFO L125 PetriNetUnfolderBase]: For 4034/4288 co-relation queries the response was YES. [2024-11-12 16:21:08,951 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. [2024-11-12 16:21:08,977 INFO L140 encePairwiseOnDemand]: 93/105 looper letters, 138 selfloop transitions, 27 changer transitions 0/209 dead transitions. [2024-11-12 16:21:08,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 209 transitions, 1196 flow [2024-11-12 16:21:08,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-12 16:21:08,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-12 16:21:08,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 707 transitions. [2024-11-12 16:21:08,985 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6733333333333333 [2024-11-12 16:21:08,985 INFO L175 Difference]: Start difference. First operand has 131 places, 119 transitions, 620 flow. Second operand 10 states and 707 transitions. [2024-11-12 16:21:08,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 209 transitions, 1196 flow [2024-11-12 16:21:08,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 209 transitions, 1172 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:21:08,994 INFO L231 Difference]: Finished difference. Result has 141 places, 122 transitions, 686 flow [2024-11-12 16:21:08,996 INFO L262 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} [2024-11-12 16:21:08,997 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, 45 predicate places. [2024-11-12 16:21:08,997 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 122 transitions, 686 flow [2024-11-12 16:21:08,998 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) [2024-11-12 16:21:08,999 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:21:08,999 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:21:09,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-12 16:21:09,199 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 [2024-11-12 16:21:09,200 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-12 16:21:09,200 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:21:09,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1963332334, now seen corresponding path program 1 times [2024-11-12 16:21:09,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:21:09,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357740142] [2024-11-12 16:21:09,200 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:21:09,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:21:09,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:21:09,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:21:09,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:21:09,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357740142] [2024-11-12 16:21:09,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357740142] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:21:09,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:21:09,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:21:09,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830882847] [2024-11-12 16:21:09,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:21:09,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:21:09,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:21:09,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:21:09,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:21:09,398 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 105 [2024-11-12 16:21:09,399 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) [2024-11-12 16:21:09,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:21:09,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 105 [2024-11-12 16:21:09,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:21:10,030 INFO L124 PetriNetUnfolderBase]: 5049/9465 cut-off events. [2024-11-12 16:21:10,031 INFO L125 PetriNetUnfolderBase]: For 5898/6164 co-relation queries the response was YES. [2024-11-12 16:21:10,061 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. [2024-11-12 16:21:10,091 INFO L140 encePairwiseOnDemand]: 99/105 looper letters, 64 selfloop transitions, 9 changer transitions 0/118 dead transitions. [2024-11-12 16:21:10,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 118 transitions, 824 flow [2024-11-12 16:21:10,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:21:10,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:21:10,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 262 transitions. [2024-11-12 16:21:10,096 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6238095238095238 [2024-11-12 16:21:10,096 INFO L175 Difference]: Start difference. First operand has 141 places, 122 transitions, 686 flow. Second operand 4 states and 262 transitions. [2024-11-12 16:21:10,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 118 transitions, 824 flow [2024-11-12 16:21:10,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 118 transitions, 773 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-11-12 16:21:10,118 INFO L231 Difference]: Finished difference. Result has 134 places, 118 transitions, 645 flow [2024-11-12 16:21:10,118 INFO L262 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} [2024-11-12 16:21:10,119 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, 38 predicate places. [2024-11-12 16:21:10,119 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 118 transitions, 645 flow [2024-11-12 16:21:10,119 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) [2024-11-12 16:21:10,119 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:21:10,119 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:21:10,124 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-12 16:21:10,124 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-12 16:21:10,125 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:21:10,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1963332335, now seen corresponding path program 1 times [2024-11-12 16:21:10,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:21:10,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127109231] [2024-11-12 16:21:10,125 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:21:10,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:21:10,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:21:10,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:21:10,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:21:10,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127109231] [2024-11-12 16:21:10,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127109231] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:21:10,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216116682] [2024-11-12 16:21:10,266 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:21:10,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:21:10,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:21:10,268 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) [2024-11-12 16:21:10,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-12 16:21:10,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:21:10,365 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-12 16:21:10,366 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:21:10,430 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:21:10,430 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:21:10,468 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 [2024-11-12 16:21:10,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:21:10,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216116682] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:21:10,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:21:10,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-12 16:21:10,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897517280] [2024-11-12 16:21:10,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:21:10,493 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-12 16:21:10,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:21:10,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-12 16:21:10,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-11-12 16:21:11,006 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 105 [2024-11-12 16:21:11,007 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) [2024-11-12 16:21:11,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:21:11,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 105 [2024-11-12 16:21:11,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:21:11,802 INFO L124 PetriNetUnfolderBase]: 5029/8804 cut-off events. [2024-11-12 16:21:11,805 INFO L125 PetriNetUnfolderBase]: For 4507/4757 co-relation queries the response was YES. [2024-11-12 16:21:11,829 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. [2024-11-12 16:21:11,854 INFO L140 encePairwiseOnDemand]: 93/105 looper letters, 136 selfloop transitions, 27 changer transitions 0/207 dead transitions. [2024-11-12 16:21:11,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 207 transitions, 1235 flow [2024-11-12 16:21:11,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-12 16:21:11,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-12 16:21:11,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 618 transitions. [2024-11-12 16:21:11,856 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7357142857142858 [2024-11-12 16:21:11,856 INFO L175 Difference]: Start difference. First operand has 134 places, 118 transitions, 645 flow. Second operand 8 states and 618 transitions. [2024-11-12 16:21:11,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 207 transitions, 1235 flow [2024-11-12 16:21:11,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 207 transitions, 1225 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:21:11,873 INFO L231 Difference]: Finished difference. Result has 143 places, 121 transitions, 725 flow [2024-11-12 16:21:11,873 INFO L262 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} [2024-11-12 16:21:11,874 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, 47 predicate places. [2024-11-12 16:21:11,874 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 121 transitions, 725 flow [2024-11-12 16:21:11,874 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) [2024-11-12 16:21:11,874 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:21:11,874 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:21:11,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-12 16:21:12,078 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 [2024-11-12 16:21:12,079 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-12 16:21:12,079 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:21:12,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1983873211, now seen corresponding path program 1 times [2024-11-12 16:21:12,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:21:12,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283923195] [2024-11-12 16:21:12,080 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:21:12,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:21:12,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:21:12,407 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:21:12,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:21:12,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283923195] [2024-11-12 16:21:12,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283923195] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:21:12,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730050178] [2024-11-12 16:21:12,407 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:21:12,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:21:12,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:21:12,410 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) [2024-11-12 16:21:12,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-12 16:21:12,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:21:12,484 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-12 16:21:12,485 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:21:12,491 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 [2024-11-12 16:21:12,541 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-12 16:21:12,542 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 [2024-11-12 16:21:12,546 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 [2024-11-12 16:21:12,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 16:21:12,575 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 [2024-11-12 16:21:12,584 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:21:12,584 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 [2024-11-12 16:21:12,646 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:21:12,646 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:21:12,806 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 [2024-11-12 16:21:12,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:21:12,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730050178] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:21:12,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:21:12,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 14 [2024-11-12 16:21:12,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396000137] [2024-11-12 16:21:12,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:21:12,943 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-12 16:21:12,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:21:12,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-12 16:21:12,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2024-11-12 16:21:19,001 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 105 [2024-11-12 16:21:19,002 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) [2024-11-12 16:21:19,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:21:19,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 105 [2024-11-12 16:21:19,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:21:20,468 INFO L124 PetriNetUnfolderBase]: 8783/15287 cut-off events. [2024-11-12 16:21:20,468 INFO L125 PetriNetUnfolderBase]: For 13096/13850 co-relation queries the response was YES. [2024-11-12 16:21:20,503 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. [2024-11-12 16:21:20,546 INFO L140 encePairwiseOnDemand]: 93/105 looper letters, 140 selfloop transitions, 26 changer transitions 0/205 dead transitions. [2024-11-12 16:21:20,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 205 transitions, 1385 flow [2024-11-12 16:21:20,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-12 16:21:20,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-12 16:21:20,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 515 transitions. [2024-11-12 16:21:20,548 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6130952380952381 [2024-11-12 16:21:20,548 INFO L175 Difference]: Start difference. First operand has 143 places, 121 transitions, 725 flow. Second operand 8 states and 515 transitions. [2024-11-12 16:21:20,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 205 transitions, 1385 flow [2024-11-12 16:21:20,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 205 transitions, 1331 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-12 16:21:20,563 INFO L231 Difference]: Finished difference. Result has 149 places, 124 transitions, 761 flow [2024-11-12 16:21:20,563 INFO L262 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} [2024-11-12 16:21:20,563 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, 53 predicate places. [2024-11-12 16:21:20,563 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 124 transitions, 761 flow [2024-11-12 16:21:20,564 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) [2024-11-12 16:21:20,564 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:21:20,564 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:21:20,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-12 16:21:20,764 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 [2024-11-12 16:21:20,765 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-12 16:21:20,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:21:20,765 INFO L85 PathProgramCache]: Analyzing trace with hash 277422426, now seen corresponding path program 1 times [2024-11-12 16:21:20,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:21:20,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137357305] [2024-11-12 16:21:20,766 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:21:20,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:21:20,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:21:20,847 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:21:20,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:21:20,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137357305] [2024-11-12 16:21:20,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137357305] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:21:20,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778764141] [2024-11-12 16:21:20,848 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:21:20,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:21:20,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:21:20,850 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) [2024-11-12 16:21:20,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-12 16:21:20,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:21:20,933 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-12 16:21:20,934 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:21:21,007 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:21:21,008 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:21:21,060 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:21:21,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778764141] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:21:21,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:21:21,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2024-11-12 16:21:21,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121946589] [2024-11-12 16:21:21,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:21:21,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-12 16:21:21,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:21:21,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-12 16:21:21,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-11-12 16:21:21,308 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 105 [2024-11-12 16:21:21,309 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) [2024-11-12 16:21:21,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:21:21,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 105 [2024-11-12 16:21:21,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:21:24,558 INFO L124 PetriNetUnfolderBase]: 18400/31619 cut-off events. [2024-11-12 16:21:24,558 INFO L125 PetriNetUnfolderBase]: For 32119/34791 co-relation queries the response was YES. [2024-11-12 16:21:24,659 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. [2024-11-12 16:21:24,827 INFO L140 encePairwiseOnDemand]: 93/105 looper letters, 401 selfloop transitions, 78 changer transitions 0/528 dead transitions. [2024-11-12 16:21:24,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 528 transitions, 3408 flow [2024-11-12 16:21:24,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-12 16:21:24,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2024-11-12 16:21:24,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3285 transitions. [2024-11-12 16:21:24,839 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6801242236024845 [2024-11-12 16:21:24,839 INFO L175 Difference]: Start difference. First operand has 149 places, 124 transitions, 761 flow. Second operand 46 states and 3285 transitions. [2024-11-12 16:21:24,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 528 transitions, 3408 flow [2024-11-12 16:21:24,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 528 transitions, 3342 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-12 16:21:24,910 INFO L231 Difference]: Finished difference. Result has 205 places, 182 transitions, 1433 flow [2024-11-12 16:21:24,910 INFO L262 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} [2024-11-12 16:21:24,911 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, 109 predicate places. [2024-11-12 16:21:24,914 INFO L471 AbstractCegarLoop]: Abstraction has has 205 places, 182 transitions, 1433 flow [2024-11-12 16:21:24,914 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) [2024-11-12 16:21:24,914 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:21:24,915 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:21:24,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-12 16:21:25,115 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 [2024-11-12 16:21:25,116 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-12 16:21:25,118 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:21:25,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1370528172, now seen corresponding path program 1 times [2024-11-12 16:21:25,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:21:25,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764828017] [2024-11-12 16:21:25,118 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:21:25,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:21:25,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:21:25,327 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:21:25,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:21:25,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764828017] [2024-11-12 16:21:25,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764828017] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:21:25,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038764780] [2024-11-12 16:21:25,331 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:21:25,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:21:25,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:21:25,333 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) [2024-11-12 16:21:25,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-12 16:21:25,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:21:25,410 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-12 16:21:25,412 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:21:25,606 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:21:25,606 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:21:25,654 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 [2024-11-12 16:21:25,688 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:21:25,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038764780] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:21:25,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:21:25,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-12 16:21:25,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299072893] [2024-11-12 16:21:25,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:21:25,688 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-12 16:21:25,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:21:25,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-12 16:21:25,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-11-12 16:21:26,057 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 105 [2024-11-12 16:21:26,057 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) [2024-11-12 16:21:26,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:21:26,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 105 [2024-11-12 16:21:26,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:21:30,486 INFO L124 PetriNetUnfolderBase]: 20301/35348 cut-off events. [2024-11-12 16:21:30,486 INFO L125 PetriNetUnfolderBase]: For 46807/50647 co-relation queries the response was YES. [2024-11-12 16:21:30,681 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. [2024-11-12 16:21:30,772 INFO L140 encePairwiseOnDemand]: 93/105 looper letters, 187 selfloop transitions, 44 changer transitions 0/278 dead transitions. [2024-11-12 16:21:30,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 278 transitions, 2331 flow [2024-11-12 16:21:30,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-12 16:21:30,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-12 16:21:30,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 611 transitions. [2024-11-12 16:21:30,773 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7273809523809524 [2024-11-12 16:21:30,774 INFO L175 Difference]: Start difference. First operand has 205 places, 182 transitions, 1433 flow. Second operand 8 states and 611 transitions. [2024-11-12 16:21:30,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 278 transitions, 2331 flow [2024-11-12 16:21:30,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 278 transitions, 2283 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-11-12 16:21:30,864 INFO L231 Difference]: Finished difference. Result has 207 places, 185 transitions, 1518 flow [2024-11-12 16:21:30,865 INFO L262 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} [2024-11-12 16:21:30,865 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, 111 predicate places. [2024-11-12 16:21:30,865 INFO L471 AbstractCegarLoop]: Abstraction has has 207 places, 185 transitions, 1518 flow [2024-11-12 16:21:30,865 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) [2024-11-12 16:21:30,865 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:21:30,865 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:21:30,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-12 16:21:31,066 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 [2024-11-12 16:21:31,066 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-12 16:21:31,067 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:21:31,067 INFO L85 PathProgramCache]: Analyzing trace with hash 769716370, now seen corresponding path program 1 times [2024-11-12 16:21:31,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:21:31,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916150980] [2024-11-12 16:21:31,067 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:21:31,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:21:31,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:21:31,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:21:31,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:21:31,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916150980] [2024-11-12 16:21:31,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916150980] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:21:31,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551973455] [2024-11-12 16:21:31,142 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:21:31,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:21:31,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:21:31,146 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) [2024-11-12 16:21:31,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-12 16:21:31,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:21:31,268 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-12 16:21:31,269 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:21:31,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:21:31,368 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:21:31,472 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:21:31,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551973455] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:21:31,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:21:31,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2024-11-12 16:21:31,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182434798] [2024-11-12 16:21:31,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:21:31,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-12 16:21:31,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:21:31,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-12 16:21:31,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2024-11-12 16:21:31,943 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 105 [2024-11-12 16:21:31,944 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) [2024-11-12 16:21:31,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:21:31,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 105 [2024-11-12 16:21:31,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:21:38,791 INFO L124 PetriNetUnfolderBase]: 28572/50427 cut-off events. [2024-11-12 16:21:38,791 INFO L125 PetriNetUnfolderBase]: For 78941/85491 co-relation queries the response was YES. [2024-11-12 16:21:39,117 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. [2024-11-12 16:21:39,418 INFO L140 encePairwiseOnDemand]: 93/105 looper letters, 425 selfloop transitions, 83 changer transitions 0/558 dead transitions. [2024-11-12 16:21:39,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 558 transitions, 4089 flow [2024-11-12 16:21:39,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-12 16:21:39,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-12 16:21:39,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2072 transitions. [2024-11-12 16:21:39,420 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7308641975308642 [2024-11-12 16:21:39,421 INFO L175 Difference]: Start difference. First operand has 207 places, 185 transitions, 1518 flow. Second operand 27 states and 2072 transitions. [2024-11-12 16:21:39,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 558 transitions, 4089 flow [2024-11-12 16:21:39,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 558 transitions, 4012 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:21:39,760 INFO L231 Difference]: Finished difference. Result has 236 places, 199 transitions, 1821 flow [2024-11-12 16:21:39,761 INFO L262 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} [2024-11-12 16:21:39,761 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, 140 predicate places. [2024-11-12 16:21:39,761 INFO L471 AbstractCegarLoop]: Abstraction has has 236 places, 199 transitions, 1821 flow [2024-11-12 16:21:39,761 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) [2024-11-12 16:21:39,761 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:21:39,761 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:21:39,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-12 16:21:39,962 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 [2024-11-12 16:21:39,963 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-12 16:21:39,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:21:39,966 INFO L85 PathProgramCache]: Analyzing trace with hash -421804490, now seen corresponding path program 2 times [2024-11-12 16:21:39,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:21:39,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612331058] [2024-11-12 16:21:39,967 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:21:39,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:21:39,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:21:40,274 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:21:40,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:21:40,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612331058] [2024-11-12 16:21:40,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612331058] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:21:40,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791653147] [2024-11-12 16:21:40,278 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:21:40,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:21:40,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:21:40,284 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) [2024-11-12 16:21:40,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-12 16:21:40,468 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 16:21:40,468 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:21:40,470 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-12 16:21:40,475 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:21:40,484 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 [2024-11-12 16:21:40,593 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-12 16:21:40,593 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 [2024-11-12 16:21:40,625 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-12 16:21:40,625 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 17 treesize of output 21 [2024-11-12 16:21:40,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 16:21:40,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2024-11-12 16:21:40,757 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-11-12 16:21:40,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2024-11-12 16:21:40,841 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:21:40,841 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:21:41,133 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 [2024-11-12 16:21:41,405 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:21:41,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791653147] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:21:41,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:21:41,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-12 16:21:41,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578981538] [2024-11-12 16:21:41,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:21:41,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-12 16:21:41,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:21:41,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-12 16:21:41,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2024-11-12 16:21:47,280 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 105 [2024-11-12 16:21:47,281 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) [2024-11-12 16:21:47,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:21:47,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 105 [2024-11-12 16:21:47,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:21:56,983 INFO L124 PetriNetUnfolderBase]: 43557/74200 cut-off events. [2024-11-12 16:21:56,983 INFO L125 PetriNetUnfolderBase]: For 107049/113792 co-relation queries the response was YES. [2024-11-12 16:21:57,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191327 conditions, 74200 events. 43557/74200 cut-off events. For 107049/113792 co-relation queries the response was YES. Maximal size of possible extension queue 2415. Compared 678676 event pairs, 20593 based on Foata normal form. 367/70614 useless extension candidates. Maximal degree in co-relation 189996. Up to 26503 conditions per place. [2024-11-12 16:21:58,188 INFO L140 encePairwiseOnDemand]: 93/105 looper letters, 233 selfloop transitions, 69 changer transitions 0/342 dead transitions. [2024-11-12 16:21:58,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 342 transitions, 3180 flow [2024-11-12 16:21:58,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-12 16:21:58,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-12 16:21:58,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 711 transitions. [2024-11-12 16:21:58,193 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6155844155844156 [2024-11-12 16:21:58,193 INFO L175 Difference]: Start difference. First operand has 236 places, 199 transitions, 1821 flow. Second operand 11 states and 711 transitions. [2024-11-12 16:21:58,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 342 transitions, 3180 flow [2024-11-12 16:21:58,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 342 transitions, 3105 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-11-12 16:21:58,595 INFO L231 Difference]: Finished difference. Result has 242 places, 208 transitions, 2053 flow [2024-11-12 16:21:58,595 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=1754, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2053, PETRI_PLACES=242, PETRI_TRANSITIONS=208} [2024-11-12 16:21:58,596 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, 146 predicate places. [2024-11-12 16:21:58,596 INFO L471 AbstractCegarLoop]: Abstraction has has 242 places, 208 transitions, 2053 flow [2024-11-12 16:21:58,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2024-11-12 16:21:58,597 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:21:58,597 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:21:58,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-12 16:21:58,801 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-12 16:21:58,802 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-12 16:21:58,802 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:21:58,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1446429505, now seen corresponding path program 1 times [2024-11-12 16:21:58,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:21:58,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375639047] [2024-11-12 16:21:58,802 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:21:58,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:21:58,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:21:58,899 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:21:58,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:21:58,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375639047] [2024-11-12 16:21:58,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375639047] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:21:58,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413030722] [2024-11-12 16:21:58,901 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:21:58,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:21:58,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:21:58,903 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:21:58,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-12 16:21:58,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:21:58,988 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-12 16:21:58,989 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:21:59,107 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:21:59,108 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:21:59,172 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:21:59,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413030722] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:21:59,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:21:59,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2024-11-12 16:21:59,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345314241] [2024-11-12 16:21:59,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:21:59,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-12 16:21:59,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:21:59,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-12 16:21:59,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-11-12 16:21:59,512 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 105 [2024-11-12 16:21:59,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 208 transitions, 2053 flow. Second operand has 15 states, 15 states have (on average 64.93333333333334) internal successors, (974), 15 states have internal predecessors, (974), 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) [2024-11-12 16:21:59,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:21:59,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 105 [2024-11-12 16:21:59,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:22:06,399 INFO L124 PetriNetUnfolderBase]: 30592/54115 cut-off events. [2024-11-12 16:22:06,399 INFO L125 PetriNetUnfolderBase]: For 111523/118627 co-relation queries the response was YES. [2024-11-12 16:22:06,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138130 conditions, 54115 events. 30592/54115 cut-off events. For 111523/118627 co-relation queries the response was YES. Maximal size of possible extension queue 1870. Compared 500446 event pairs, 20877 based on Foata normal form. 871/52107 useless extension candidates. Maximal degree in co-relation 136803. Up to 14946 conditions per place. [2024-11-12 16:22:06,919 INFO L140 encePairwiseOnDemand]: 93/105 looper letters, 378 selfloop transitions, 96 changer transitions 0/528 dead transitions. [2024-11-12 16:22:06,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 528 transitions, 4381 flow [2024-11-12 16:22:06,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-12 16:22:06,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-11-12 16:22:06,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2278 transitions. [2024-11-12 16:22:06,925 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6998463901689708 [2024-11-12 16:22:06,925 INFO L175 Difference]: Start difference. First operand has 242 places, 208 transitions, 2053 flow. Second operand 31 states and 2278 transitions. [2024-11-12 16:22:06,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 528 transitions, 4381 flow [2024-11-12 16:22:07,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 528 transitions, 4313 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-11-12 16:22:07,134 INFO L231 Difference]: Finished difference. Result has 268 places, 216 transitions, 2285 flow [2024-11-12 16:22:07,135 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=105, PETRI_DIFFERENCE_MINUEND_FLOW=1990, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2285, PETRI_PLACES=268, PETRI_TRANSITIONS=216} [2024-11-12 16:22:07,138 INFO L279 CegarLoopForPetriNet]: 96 programPoint places, 172 predicate places. [2024-11-12 16:22:07,138 INFO L471 AbstractCegarLoop]: Abstraction has has 268 places, 216 transitions, 2285 flow [2024-11-12 16:22:07,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 64.93333333333334) internal successors, (974), 15 states have internal predecessors, (974), 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) [2024-11-12 16:22:07,139 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:22:07,139 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:22:07,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-12 16:22:07,340 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-12 16:22:07,340 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2024-11-12 16:22:07,341 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:22:07,341 INFO L85 PathProgramCache]: Analyzing trace with hash -191036551, now seen corresponding path program 1 times [2024-11-12 16:22:07,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:22:07,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873274786] [2024-11-12 16:22:07,341 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:07,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:22:07,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:07,533 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-12 16:22:07,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:22:07,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873274786] [2024-11-12 16:22:07,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873274786] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:22:07,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159734707] [2024-11-12 16:22:07,534 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:22:07,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:22:07,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:22:07,538 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:22:07,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-12 16:22:07,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:22:07,630 INFO L256 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-12 16:22:07,632 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:22:07,640 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 [2024-11-12 16:22:07,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 16:22:07,711 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 [2024-11-12 16:22:07,717 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:22:07,717 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 [2024-11-12 16:22:07,770 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-12 16:22:07,771 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:22:07,850 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 61 treesize of output 57 [2024-11-12 16:22:07,934 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 16:22:07,935 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 [2024-11-12 16:22:08,330 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-12 16:22:08,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159734707] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:22:08,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:22:08,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2024-11-12 16:22:08,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128658887] [2024-11-12 16:22:08,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:22:08,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-12 16:22:08,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:22:08,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-12 16:22:08,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2024-11-12 16:22:10,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:22:15,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:22:15,743 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 105 [2024-11-12 16:22:15,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 216 transitions, 2285 flow. Second operand has 19 states, 19 states have (on average 58.05263157894737) internal successors, (1103), 19 states have internal predecessors, (1103), 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) [2024-11-12 16:22:15,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:22:15,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 105 [2024-11-12 16:22:15,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand