./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-node-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3289d67d 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/chl-node-subst.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 3b43103ca9a91605874c4d895f03c4116805b9b245b91cffe9bd63255503e5a0 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-17 03:33:01,470 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 03:33:01,537 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-17 03:33:01,542 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 03:33:01,543 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 03:33:01,571 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 03:33:01,571 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 03:33:01,572 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 03:33:01,572 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 03:33:01,573 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 03:33:01,573 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-17 03:33:01,573 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-17 03:33:01,574 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 03:33:01,574 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 03:33:01,575 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 03:33:01,575 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 03:33:01,579 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 03:33:01,579 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 03:33:01,579 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 03:33:01,580 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 03:33:01,580 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-17 03:33:01,581 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-17 03:33:01,581 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-17 03:33:01,581 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-17 03:33:01,587 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-17 03:33:01,588 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 03:33:01,588 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 03:33:01,588 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 03:33:01,589 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 03:33:01,589 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 03:33:01,589 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 03:33:01,590 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-17 03:33:01,590 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-17 03:33:01,590 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:33:01,590 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 03:33:01,591 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-17 03:33:01,591 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 03:33:01,591 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-17 03:33:01,592 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-17 03:33:01,592 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-17 03:33:01,592 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-17 03:33:01,594 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-17 03:33:01,594 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3b43103ca9a91605874c4d895f03c4116805b9b245b91cffe9bd63255503e5a0 [2024-11-17 03:33:01,833 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 03:33:01,857 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 03:33:01,861 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 03:33:01,862 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 03:33:01,863 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 03:33:01,864 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-node-subst.wvr.c [2024-11-17 03:33:03,327 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 03:33:03,550 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 03:33:03,551 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-node-subst.wvr.c [2024-11-17 03:33:03,562 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b6fc4fd7/d9a7939f354248eaa011b99b2213cbbe/FLAG472955a50 [2024-11-17 03:33:03,902 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b6fc4fd7/d9a7939f354248eaa011b99b2213cbbe [2024-11-17 03:33:03,904 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 03:33:03,906 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 03:33:03,907 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 03:33:03,907 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 03:33:03,913 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 03:33:03,913 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:33:03" (1/1) ... [2024-11-17 03:33:03,915 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f4acb4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:03, skipping insertion in model container [2024-11-17 03:33:03,915 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:33:03" (1/1) ... [2024-11-17 03:33:03,936 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 03:33:04,143 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-17 03:33:04,153 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-17 03:33:04,157 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:33:04,166 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 03:33:04,210 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:33:04,227 INFO L204 MainTranslator]: Completed translation [2024-11-17 03:33:04,228 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:04 WrapperNode [2024-11-17 03:33:04,228 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 03:33:04,229 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 03:33:04,229 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 03:33:04,229 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 03:33:04,235 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:04" (1/1) ... [2024-11-17 03:33:04,245 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:04" (1/1) ... [2024-11-17 03:33:04,277 INFO L138 Inliner]: procedures = 26, calls = 52, calls flagged for inlining = 23, calls inlined = 35, statements flattened = 420 [2024-11-17 03:33:04,278 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 03:33:04,278 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 03:33:04,278 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 03:33:04,279 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 03:33:04,293 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:04" (1/1) ... [2024-11-17 03:33:04,293 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:04" (1/1) ... [2024-11-17 03:33:04,308 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:04" (1/1) ... [2024-11-17 03:33:04,334 INFO L175 MemorySlicer]: Split 26 memory accesses to 3 slices as follows [2, 9, 15]. 58 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 6 writes are split as follows [0, 3, 3]. [2024-11-17 03:33:04,335 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:04" (1/1) ... [2024-11-17 03:33:04,335 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:04" (1/1) ... [2024-11-17 03:33:04,350 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:04" (1/1) ... [2024-11-17 03:33:04,351 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:04" (1/1) ... [2024-11-17 03:33:04,358 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:04" (1/1) ... [2024-11-17 03:33:04,363 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:04" (1/1) ... [2024-11-17 03:33:04,372 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 03:33:04,373 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 03:33:04,373 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 03:33:04,373 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 03:33:04,374 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:04" (1/1) ... [2024-11-17 03:33:04,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:33:04,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:04,411 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) [2024-11-17 03:33:04,416 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 [2024-11-17 03:33:04,461 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 03:33:04,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-17 03:33:04,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-17 03:33:04,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-17 03:33:04,461 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-17 03:33:04,462 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-17 03:33:04,462 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-17 03:33:04,462 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-17 03:33:04,463 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-17 03:33:04,464 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-17 03:33:04,464 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-17 03:33:04,464 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-17 03:33:04,464 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-17 03:33:04,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 03:33:04,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-17 03:33:04,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-17 03:33:04,465 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-17 03:33:04,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 03:33:04,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 03:33:04,468 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-17 03:33:04,613 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 03:33:04,615 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 03:33:05,367 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-17 03:33:05,367 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 03:33:05,855 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 03:33:05,856 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 03:33:05,857 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:33:05 BoogieIcfgContainer [2024-11-17 03:33:05,857 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 03:33:05,860 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-17 03:33:05,861 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-17 03:33:05,864 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-17 03:33:05,865 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:33:03" (1/3) ... [2024-11-17 03:33:05,865 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d96656e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:33:05, skipping insertion in model container [2024-11-17 03:33:05,865 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:33:04" (2/3) ... [2024-11-17 03:33:05,866 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d96656e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:33:05, skipping insertion in model container [2024-11-17 03:33:05,866 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:33:05" (3/3) ... [2024-11-17 03:33:05,868 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-node-subst.wvr.c [2024-11-17 03:33:05,889 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-17 03:33:05,890 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 50 error locations. [2024-11-17 03:33:05,890 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-17 03:33:05,985 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-17 03:33:06,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 130 places, 138 transitions, 297 flow [2024-11-17 03:33:06,080 INFO L124 PetriNetUnfolderBase]: 18/135 cut-off events. [2024-11-17 03:33:06,081 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-17 03:33:06,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 135 events. 18/135 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 410 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2024-11-17 03:33:06,087 INFO L82 GeneralOperation]: Start removeDead. Operand has 130 places, 138 transitions, 297 flow [2024-11-17 03:33:06,095 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 134 transitions, 286 flow [2024-11-17 03:33:06,109 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:33:06,117 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;@41116005, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:33:06,119 INFO L334 AbstractCegarLoop]: Starting to check reachability of 89 error locations. [2024-11-17 03:33:06,124 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:33:06,124 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-17 03:33:06,125 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:33:06,125 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:06,126 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:33:06,126 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-17 03:33:06,131 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:06,132 INFO L85 PathProgramCache]: Analyzing trace with hash 38489048, now seen corresponding path program 1 times [2024-11-17 03:33:06,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:06,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327357750] [2024-11-17 03:33:06,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:06,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:06,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:06,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:33:06,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:06,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327357750] [2024-11-17 03:33:06,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327357750] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:33:06,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:33:06,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:33:06,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412506025] [2024-11-17 03:33:06,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:33:06,533 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:33:06,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:06,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:33:06,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:33:06,644 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 138 [2024-11-17 03:33:06,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 134 transitions, 286 flow. Second operand has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 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) [2024-11-17 03:33:06,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:06,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 138 [2024-11-17 03:33:06,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:07,384 INFO L124 PetriNetUnfolderBase]: 2263/5005 cut-off events. [2024-11-17 03:33:07,385 INFO L125 PetriNetUnfolderBase]: For 159/159 co-relation queries the response was YES. [2024-11-17 03:33:07,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8178 conditions, 5005 events. 2263/5005 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 40697 event pairs, 1414 based on Foata normal form. 7/3863 useless extension candidates. Maximal degree in co-relation 7651. Up to 3012 conditions per place. [2024-11-17 03:33:07,440 INFO L140 encePairwiseOnDemand]: 126/138 looper letters, 48 selfloop transitions, 2 changer transitions 0/123 dead transitions. [2024-11-17 03:33:07,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 123 transitions, 364 flow [2024-11-17 03:33:07,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:33:07,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:33:07,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 291 transitions. [2024-11-17 03:33:07,457 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7028985507246377 [2024-11-17 03:33:07,460 INFO L175 Difference]: Start difference. First operand has 126 places, 134 transitions, 286 flow. Second operand 3 states and 291 transitions. [2024-11-17 03:33:07,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 123 transitions, 364 flow [2024-11-17 03:33:07,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 123 transitions, 352 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-17 03:33:07,474 INFO L231 Difference]: Finished difference. Result has 117 places, 123 transitions, 256 flow [2024-11-17 03:33:07,476 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=256, PETRI_PLACES=117, PETRI_TRANSITIONS=123} [2024-11-17 03:33:07,481 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, -9 predicate places. [2024-11-17 03:33:07,481 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 123 transitions, 256 flow [2024-11-17 03:33:07,482 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 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) [2024-11-17 03:33:07,482 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:07,482 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:33:07,482 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-17 03:33:07,483 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-17 03:33:07,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:07,483 INFO L85 PathProgramCache]: Analyzing trace with hash 38489049, now seen corresponding path program 1 times [2024-11-17 03:33:07,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:07,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527240791] [2024-11-17 03:33:07,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:07,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:07,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:07,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:33:07,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:07,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527240791] [2024-11-17 03:33:07,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527240791] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:33:07,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:33:07,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:33:07,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267587935] [2024-11-17 03:33:07,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:33:07,840 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:33:07,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:07,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:33:07,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:33:07,950 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 138 [2024-11-17 03:33:07,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 123 transitions, 256 flow. Second operand has 4 states, 4 states have (on average 74.75) internal successors, (299), 4 states have internal predecessors, (299), 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) [2024-11-17 03:33:07,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:07,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 138 [2024-11-17 03:33:07,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:08,589 INFO L124 PetriNetUnfolderBase]: 2263/5008 cut-off events. [2024-11-17 03:33:08,590 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-11-17 03:33:08,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8089 conditions, 5008 events. 2263/5008 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 40712 event pairs, 1414 based on Foata normal form. 0/3853 useless extension candidates. Maximal degree in co-relation 8044. Up to 3027 conditions per place. [2024-11-17 03:33:08,636 INFO L140 encePairwiseOnDemand]: 134/138 looper letters, 56 selfloop transitions, 2 changer transitions 0/125 dead transitions. [2024-11-17 03:33:08,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 125 transitions, 376 flow [2024-11-17 03:33:08,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:33:08,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:33:08,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 282 transitions. [2024-11-17 03:33:08,641 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6811594202898551 [2024-11-17 03:33:08,641 INFO L175 Difference]: Start difference. First operand has 117 places, 123 transitions, 256 flow. Second operand 3 states and 282 transitions. [2024-11-17 03:33:08,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 125 transitions, 376 flow [2024-11-17 03:33:08,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 125 transitions, 372 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:33:08,648 INFO L231 Difference]: Finished difference. Result has 118 places, 124 transitions, 266 flow [2024-11-17 03:33:08,648 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=266, PETRI_PLACES=118, PETRI_TRANSITIONS=124} [2024-11-17 03:33:08,649 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, -8 predicate places. [2024-11-17 03:33:08,649 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 124 transitions, 266 flow [2024-11-17 03:33:08,650 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.75) internal successors, (299), 4 states have internal predecessors, (299), 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) [2024-11-17 03:33:08,650 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:08,650 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-17 03:33:08,650 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-17 03:33:08,651 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-17 03:33:08,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:08,653 INFO L85 PathProgramCache]: Analyzing trace with hash -127788765, now seen corresponding path program 1 times [2024-11-17 03:33:08,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:08,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850833577] [2024-11-17 03:33:08,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:08,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:08,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:08,924 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:33:08,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:08,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850833577] [2024-11-17 03:33:08,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850833577] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:33:08,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148046951] [2024-11-17 03:33:08,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:08,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:08,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:08,930 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) [2024-11-17 03:33:08,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-17 03:33:09,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:09,034 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-17 03:33:09,039 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:33:09,120 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 [2024-11-17 03:33:09,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:33:09,305 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:33:09,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:33:09,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148046951] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:33:09,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:33:09,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-17 03:33:09,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001950711] [2024-11-17 03:33:09,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:33:09,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-17 03:33:09,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:09,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-17 03:33:09,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-17 03:33:09,977 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 138 [2024-11-17 03:33:09,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 124 transitions, 266 flow. Second operand has 11 states, 11 states have (on average 75.36363636363636) internal successors, (829), 11 states have internal predecessors, (829), 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) [2024-11-17 03:33:09,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:09,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 138 [2024-11-17 03:33:09,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:10,825 INFO L124 PetriNetUnfolderBase]: 2264/5012 cut-off events. [2024-11-17 03:33:10,825 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-11-17 03:33:10,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8102 conditions, 5012 events. 2264/5012 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 40708 event pairs, 1414 based on Foata normal form. 0/3859 useless extension candidates. Maximal degree in co-relation 8088. Up to 3021 conditions per place. [2024-11-17 03:33:10,863 INFO L140 encePairwiseOnDemand]: 129/138 looper letters, 49 selfloop transitions, 12 changer transitions 0/128 dead transitions. [2024-11-17 03:33:10,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 128 transitions, 398 flow [2024-11-17 03:33:10,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-17 03:33:10,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-17 03:33:10,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 655 transitions. [2024-11-17 03:33:10,867 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5932971014492754 [2024-11-17 03:33:10,867 INFO L175 Difference]: Start difference. First operand has 118 places, 124 transitions, 266 flow. Second operand 8 states and 655 transitions. [2024-11-17 03:33:10,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 128 transitions, 398 flow [2024-11-17 03:33:10,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 128 transitions, 396 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:33:10,870 INFO L231 Difference]: Finished difference. Result has 123 places, 127 transitions, 296 flow [2024-11-17 03:33:10,871 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=296, PETRI_PLACES=123, PETRI_TRANSITIONS=127} [2024-11-17 03:33:10,871 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, -3 predicate places. [2024-11-17 03:33:10,872 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 127 transitions, 296 flow [2024-11-17 03:33:10,872 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 75.36363636363636) internal successors, (829), 11 states have internal predecessors, (829), 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) [2024-11-17 03:33:10,872 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:10,873 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:10,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-17 03:33:11,073 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:11,074 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-17 03:33:11,074 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:11,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1613563637, now seen corresponding path program 1 times [2024-11-17 03:33:11,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:11,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548080299] [2024-11-17 03:33:11,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:11,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:11,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:11,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:33:11,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:11,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548080299] [2024-11-17 03:33:11,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548080299] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:33:11,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:33:11,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:33:11,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742227710] [2024-11-17 03:33:11,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:33:11,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:33:11,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:11,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:33:11,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:33:11,542 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 138 [2024-11-17 03:33:11,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 127 transitions, 296 flow. Second operand has 5 states, 5 states have (on average 78.2) internal successors, (391), 5 states have internal predecessors, (391), 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) [2024-11-17 03:33:11,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:11,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 138 [2024-11-17 03:33:11,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:12,171 INFO L124 PetriNetUnfolderBase]: 2265/5017 cut-off events. [2024-11-17 03:33:12,171 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2024-11-17 03:33:12,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8120 conditions, 5017 events. 2265/5017 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 40782 event pairs, 1414 based on Foata normal form. 0/3866 useless extension candidates. Maximal degree in co-relation 8081. Up to 3025 conditions per place. [2024-11-17 03:33:12,212 INFO L140 encePairwiseOnDemand]: 132/138 looper letters, 54 selfloop transitions, 6 changer transitions 0/130 dead transitions. [2024-11-17 03:33:12,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 130 transitions, 424 flow [2024-11-17 03:33:12,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:33:12,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:33:12,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 366 transitions. [2024-11-17 03:33:12,214 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6630434782608695 [2024-11-17 03:33:12,215 INFO L175 Difference]: Start difference. First operand has 123 places, 127 transitions, 296 flow. Second operand 4 states and 366 transitions. [2024-11-17 03:33:12,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 130 transitions, 424 flow [2024-11-17 03:33:12,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 130 transitions, 405 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-17 03:33:12,221 INFO L231 Difference]: Finished difference. Result has 124 places, 129 transitions, 307 flow [2024-11-17 03:33:12,221 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=307, PETRI_PLACES=124, PETRI_TRANSITIONS=129} [2024-11-17 03:33:12,222 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, -2 predicate places. [2024-11-17 03:33:12,223 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 129 transitions, 307 flow [2024-11-17 03:33:12,223 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.2) internal successors, (391), 5 states have internal predecessors, (391), 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) [2024-11-17 03:33:12,223 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:12,223 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:12,224 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-17 03:33:12,224 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-17 03:33:12,224 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:12,224 INFO L85 PathProgramCache]: Analyzing trace with hash -399107829, now seen corresponding path program 1 times [2024-11-17 03:33:12,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:12,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215786233] [2024-11-17 03:33:12,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:12,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:12,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:12,480 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:33:12,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:12,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215786233] [2024-11-17 03:33:12,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215786233] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:33:12,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529331553] [2024-11-17 03:33:12,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:12,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:12,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:12,483 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) [2024-11-17 03:33:12,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-17 03:33:12,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:12,605 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-17 03:33:12,608 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:33:12,640 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 10 treesize of output 9 [2024-11-17 03:33:12,849 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:33:12,849 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:33:13,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:33:13,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529331553] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:33:13,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:33:13,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-17 03:33:13,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214698510] [2024-11-17 03:33:13,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:33:13,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-17 03:33:13,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:13,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-17 03:33:13,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-17 03:33:14,464 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 138 [2024-11-17 03:33:14,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 129 transitions, 307 flow. Second operand has 13 states, 13 states have (on average 74.76923076923077) internal successors, (972), 13 states have internal predecessors, (972), 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) [2024-11-17 03:33:14,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:14,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 138 [2024-11-17 03:33:14,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:15,391 INFO L124 PetriNetUnfolderBase]: 2634/5729 cut-off events. [2024-11-17 03:33:15,393 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2024-11-17 03:33:15,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9316 conditions, 5729 events. 2634/5729 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 47560 event pairs, 1618 based on Foata normal form. 0/4259 useless extension candidates. Maximal degree in co-relation 9274. Up to 3483 conditions per place. [2024-11-17 03:33:15,440 INFO L140 encePairwiseOnDemand]: 128/138 looper letters, 50 selfloop transitions, 19 changer transitions 0/135 dead transitions. [2024-11-17 03:33:15,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 135 transitions, 461 flow [2024-11-17 03:33:15,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-17 03:33:15,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-17 03:33:15,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 801 transitions. [2024-11-17 03:33:15,444 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5804347826086956 [2024-11-17 03:33:15,444 INFO L175 Difference]: Start difference. First operand has 124 places, 129 transitions, 307 flow. Second operand 10 states and 801 transitions. [2024-11-17 03:33:15,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 135 transitions, 461 flow [2024-11-17 03:33:15,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 135 transitions, 455 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:33:15,448 INFO L231 Difference]: Finished difference. Result has 130 places, 132 transitions, 347 flow [2024-11-17 03:33:15,450 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=347, PETRI_PLACES=130, PETRI_TRANSITIONS=132} [2024-11-17 03:33:15,451 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, 4 predicate places. [2024-11-17 03:33:15,451 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 132 transitions, 347 flow [2024-11-17 03:33:15,452 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 74.76923076923077) internal successors, (972), 13 states have internal predecessors, (972), 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) [2024-11-17 03:33:15,454 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:15,454 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:15,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-17 03:33:15,658 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:15,659 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-17 03:33:15,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:15,659 INFO L85 PathProgramCache]: Analyzing trace with hash -399560201, now seen corresponding path program 1 times [2024-11-17 03:33:15,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:15,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527852497] [2024-11-17 03:33:15,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:15,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:15,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:15,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-17 03:33:15,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:15,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527852497] [2024-11-17 03:33:15,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527852497] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:33:15,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:33:15,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:33:15,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545777183] [2024-11-17 03:33:15,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:33:15,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:33:15,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:15,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:33:15,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:33:15,747 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 138 [2024-11-17 03:33:15,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 132 transitions, 347 flow. Second operand has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 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) [2024-11-17 03:33:15,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:15,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 138 [2024-11-17 03:33:15,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:16,368 INFO L124 PetriNetUnfolderBase]: 2265/5019 cut-off events. [2024-11-17 03:33:16,368 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2024-11-17 03:33:16,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8144 conditions, 5019 events. 2265/5019 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 40747 event pairs, 1414 based on Foata normal form. 1/3871 useless extension candidates. Maximal degree in co-relation 8096. Up to 3030 conditions per place. [2024-11-17 03:33:16,412 INFO L140 encePairwiseOnDemand]: 133/138 looper letters, 58 selfloop transitions, 5 changer transitions 0/131 dead transitions. [2024-11-17 03:33:16,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 131 transitions, 467 flow [2024-11-17 03:33:16,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:33:16,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:33:16,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 366 transitions. [2024-11-17 03:33:16,415 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6630434782608695 [2024-11-17 03:33:16,415 INFO L175 Difference]: Start difference. First operand has 130 places, 132 transitions, 347 flow. Second operand 4 states and 366 transitions. [2024-11-17 03:33:16,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 131 transitions, 467 flow [2024-11-17 03:33:16,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 131 transitions, 442 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-11-17 03:33:16,420 INFO L231 Difference]: Finished difference. Result has 129 places, 131 transitions, 333 flow [2024-11-17 03:33:16,420 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=333, PETRI_PLACES=129, PETRI_TRANSITIONS=131} [2024-11-17 03:33:16,422 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, 3 predicate places. [2024-11-17 03:33:16,423 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 131 transitions, 333 flow [2024-11-17 03:33:16,423 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.0) internal successors, (316), 4 states have internal predecessors, (316), 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) [2024-11-17 03:33:16,424 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:16,424 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:16,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-17 03:33:16,424 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-17 03:33:16,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:16,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1351085577, now seen corresponding path program 1 times [2024-11-17 03:33:16,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:16,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901742698] [2024-11-17 03:33:16,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:16,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:16,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:16,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:33:16,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:16,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901742698] [2024-11-17 03:33:16,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901742698] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:33:16,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:33:16,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:33:16,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607696337] [2024-11-17 03:33:16,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:33:16,717 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:33:16,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:16,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:33:16,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:33:16,825 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 138 [2024-11-17 03:33:16,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 131 transitions, 333 flow. Second operand has 5 states, 5 states have (on average 76.2) internal successors, (381), 5 states have internal predecessors, (381), 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) [2024-11-17 03:33:16,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:16,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 138 [2024-11-17 03:33:16,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:17,345 INFO L124 PetriNetUnfolderBase]: 2265/5022 cut-off events. [2024-11-17 03:33:17,345 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2024-11-17 03:33:17,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8146 conditions, 5022 events. 2265/5022 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 40753 event pairs, 1414 based on Foata normal form. 0/3871 useless extension candidates. Maximal degree in co-relation 8097. Up to 3033 conditions per place. [2024-11-17 03:33:17,384 INFO L140 encePairwiseOnDemand]: 132/138 looper letters, 61 selfloop transitions, 5 changer transitions 0/133 dead transitions. [2024-11-17 03:33:17,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 133 transitions, 469 flow [2024-11-17 03:33:17,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:33:17,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:33:17,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 356 transitions. [2024-11-17 03:33:17,386 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.644927536231884 [2024-11-17 03:33:17,386 INFO L175 Difference]: Start difference. First operand has 129 places, 131 transitions, 333 flow. Second operand 4 states and 356 transitions. [2024-11-17 03:33:17,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 133 transitions, 469 flow [2024-11-17 03:33:17,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 133 transitions, 459 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:33:17,390 INFO L231 Difference]: Finished difference. Result has 130 places, 132 transitions, 346 flow [2024-11-17 03:33:17,390 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=346, PETRI_PLACES=130, PETRI_TRANSITIONS=132} [2024-11-17 03:33:17,392 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, 4 predicate places. [2024-11-17 03:33:17,392 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 132 transitions, 346 flow [2024-11-17 03:33:17,392 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 76.2) internal successors, (381), 5 states have internal predecessors, (381), 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) [2024-11-17 03:33:17,393 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:17,393 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:17,393 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-17 03:33:17,393 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-17 03:33:17,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:17,397 INFO L85 PathProgramCache]: Analyzing trace with hash -2050733474, now seen corresponding path program 1 times [2024-11-17 03:33:17,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:17,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828098158] [2024-11-17 03:33:17,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:17,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:17,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:17,684 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:33:17,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:17,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828098158] [2024-11-17 03:33:17,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828098158] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:33:17,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544481612] [2024-11-17 03:33:17,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:17,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:17,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:17,687 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) [2024-11-17 03:33:17,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-17 03:33:17,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:17,805 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-17 03:33:17,807 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:33:17,839 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 [2024-11-17 03:33:18,019 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:33:18,019 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:33:18,286 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:33:18,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544481612] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:33:18,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:33:18,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-17 03:33:18,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865853944] [2024-11-17 03:33:18,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:33:18,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-17 03:33:18,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:18,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-17 03:33:18,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-17 03:33:20,349 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 138 [2024-11-17 03:33:20,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 132 transitions, 346 flow. Second operand has 13 states, 13 states have (on average 72.38461538461539) internal successors, (941), 13 states have internal predecessors, (941), 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) [2024-11-17 03:33:20,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:20,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 138 [2024-11-17 03:33:20,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:21,298 INFO L124 PetriNetUnfolderBase]: 3793/7330 cut-off events. [2024-11-17 03:33:21,299 INFO L125 PetriNetUnfolderBase]: For 89/89 co-relation queries the response was YES. [2024-11-17 03:33:21,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12487 conditions, 7330 events. 3793/7330 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 57407 event pairs, 2446 based on Foata normal form. 0/5426 useless extension candidates. Maximal degree in co-relation 12437. Up to 5029 conditions per place. [2024-11-17 03:33:21,371 INFO L140 encePairwiseOnDemand]: 128/138 looper letters, 55 selfloop transitions, 19 changer transitions 0/137 dead transitions. [2024-11-17 03:33:21,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 137 transitions, 508 flow [2024-11-17 03:33:21,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-17 03:33:21,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-17 03:33:21,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 771 transitions. [2024-11-17 03:33:21,374 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.558695652173913 [2024-11-17 03:33:21,374 INFO L175 Difference]: Start difference. First operand has 130 places, 132 transitions, 346 flow. Second operand 10 states and 771 transitions. [2024-11-17 03:33:21,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 137 transitions, 508 flow [2024-11-17 03:33:21,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 137 transitions, 503 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:33:21,377 INFO L231 Difference]: Finished difference. Result has 136 places, 135 transitions, 385 flow [2024-11-17 03:33:21,378 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=385, PETRI_PLACES=136, PETRI_TRANSITIONS=135} [2024-11-17 03:33:21,378 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, 10 predicate places. [2024-11-17 03:33:21,379 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 135 transitions, 385 flow [2024-11-17 03:33:21,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 72.38461538461539) internal successors, (941), 13 states have internal predecessors, (941), 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) [2024-11-17 03:33:21,379 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:21,380 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:21,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-17 03:33:21,583 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:21,584 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-17 03:33:21,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:21,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1783696489, now seen corresponding path program 1 times [2024-11-17 03:33:21,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:21,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691794503] [2024-11-17 03:33:21,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:21,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:21,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:21,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:33:21,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:21,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691794503] [2024-11-17 03:33:21,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691794503] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:33:21,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27802408] [2024-11-17 03:33:21,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:21,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:21,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:21,864 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) [2024-11-17 03:33:21,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-17 03:33:21,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:21,965 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-17 03:33:21,966 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:33:22,046 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 [2024-11-17 03:33:22,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-17 03:33:22,058 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-17 03:33:22,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27802408] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:33:22,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-17 03:33:22,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-17 03:33:22,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929842320] [2024-11-17 03:33:22,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:33:22,059 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:33:22,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:22,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:33:22,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-17 03:33:22,151 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 138 [2024-11-17 03:33:22,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 135 transitions, 385 flow. Second operand has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 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) [2024-11-17 03:33:22,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:22,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 138 [2024-11-17 03:33:22,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:22,559 INFO L124 PetriNetUnfolderBase]: 2267/5032 cut-off events. [2024-11-17 03:33:22,559 INFO L125 PetriNetUnfolderBase]: For 86/86 co-relation queries the response was YES. [2024-11-17 03:33:22,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8184 conditions, 5032 events. 2267/5032 cut-off events. For 86/86 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 40796 event pairs, 1414 based on Foata normal form. 0/3883 useless extension candidates. Maximal degree in co-relation 8130. Up to 3038 conditions per place. [2024-11-17 03:33:22,602 INFO L140 encePairwiseOnDemand]: 133/138 looper letters, 66 selfloop transitions, 5 changer transitions 0/138 dead transitions. [2024-11-17 03:33:22,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 138 transitions, 533 flow [2024-11-17 03:33:22,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:33:22,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:33:22,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 365 transitions. [2024-11-17 03:33:22,605 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6612318840579711 [2024-11-17 03:33:22,605 INFO L175 Difference]: Start difference. First operand has 136 places, 135 transitions, 385 flow. Second operand 4 states and 365 transitions. [2024-11-17 03:33:22,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 138 transitions, 533 flow [2024-11-17 03:33:22,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 138 transitions, 515 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-17 03:33:22,608 INFO L231 Difference]: Finished difference. Result has 136 places, 137 transitions, 391 flow [2024-11-17 03:33:22,608 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=391, PETRI_PLACES=136, PETRI_TRANSITIONS=137} [2024-11-17 03:33:22,609 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, 10 predicate places. [2024-11-17 03:33:22,609 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 137 transitions, 391 flow [2024-11-17 03:33:22,610 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 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) [2024-11-17 03:33:22,610 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:22,610 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:22,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-17 03:33:22,814 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:22,815 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-17 03:33:22,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:22,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1783696490, now seen corresponding path program 1 times [2024-11-17 03:33:22,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:22,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061212791] [2024-11-17 03:33:22,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:22,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:22,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:22,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-17 03:33:22,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:22,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061212791] [2024-11-17 03:33:22,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061212791] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:33:22,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:33:22,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:33:22,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40183257] [2024-11-17 03:33:22,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:33:22,878 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:33:22,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:22,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:33:22,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:33:22,925 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 138 [2024-11-17 03:33:22,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 137 transitions, 391 flow. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 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) [2024-11-17 03:33:22,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:22,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 138 [2024-11-17 03:33:22,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:23,349 INFO L124 PetriNetUnfolderBase]: 2267/5028 cut-off events. [2024-11-17 03:33:23,349 INFO L125 PetriNetUnfolderBase]: For 94/94 co-relation queries the response was YES. [2024-11-17 03:33:23,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8177 conditions, 5028 events. 2267/5028 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 40778 event pairs, 1414 based on Foata normal form. 2/3884 useless extension candidates. Maximal degree in co-relation 8123. Up to 3026 conditions per place. [2024-11-17 03:33:23,384 INFO L140 encePairwiseOnDemand]: 133/138 looper letters, 64 selfloop transitions, 3 changer transitions 0/134 dead transitions. [2024-11-17 03:33:23,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 134 transitions, 519 flow [2024-11-17 03:33:23,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:33:23,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:33:23,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 284 transitions. [2024-11-17 03:33:23,386 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6859903381642513 [2024-11-17 03:33:23,387 INFO L175 Difference]: Start difference. First operand has 136 places, 137 transitions, 391 flow. Second operand 3 states and 284 transitions. [2024-11-17 03:33:23,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 134 transitions, 519 flow [2024-11-17 03:33:23,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 134 transitions, 513 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:33:23,390 INFO L231 Difference]: Finished difference. Result has 133 places, 134 transitions, 385 flow [2024-11-17 03:33:23,390 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=385, PETRI_PLACES=133, PETRI_TRANSITIONS=134} [2024-11-17 03:33:23,391 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, 7 predicate places. [2024-11-17 03:33:23,391 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 134 transitions, 385 flow [2024-11-17 03:33:23,392 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 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) [2024-11-17 03:33:23,392 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:23,392 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:23,393 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-17 03:33:23,393 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-17 03:33:23,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:23,393 INFO L85 PathProgramCache]: Analyzing trace with hash -765470395, now seen corresponding path program 1 times [2024-11-17 03:33:23,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:23,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111703477] [2024-11-17 03:33:23,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:23,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:23,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:23,533 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:33:23,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:23,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111703477] [2024-11-17 03:33:23,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111703477] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:33:23,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534794141] [2024-11-17 03:33:23,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:23,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:23,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:23,537 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) [2024-11-17 03:33:23,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-17 03:33:23,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:23,639 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-17 03:33:23,641 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:33:23,729 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:33:23,730 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:33:23,807 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:33:23,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534794141] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:33:23,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:33:23,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-17 03:33:23,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956533145] [2024-11-17 03:33:23,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:33:23,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-17 03:33:23,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:23,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-17 03:33:23,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-17 03:33:24,012 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 138 [2024-11-17 03:33:24,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 134 transitions, 385 flow. Second operand has 14 states, 14 states have (on average 76.21428571428571) internal successors, (1067), 14 states have internal predecessors, (1067), 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) [2024-11-17 03:33:24,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:24,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 138 [2024-11-17 03:33:24,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:24,879 INFO L124 PetriNetUnfolderBase]: 4462/9831 cut-off events. [2024-11-17 03:33:24,880 INFO L125 PetriNetUnfolderBase]: For 131/131 co-relation queries the response was YES. [2024-11-17 03:33:24,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16019 conditions, 9831 events. 4462/9831 cut-off events. For 131/131 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 89388 event pairs, 2808 based on Foata normal form. 0/7672 useless extension candidates. Maximal degree in co-relation 8125. Up to 3019 conditions per place. [2024-11-17 03:33:24,920 INFO L140 encePairwiseOnDemand]: 119/138 looper letters, 89 selfloop transitions, 48 changer transitions 0/198 dead transitions. [2024-11-17 03:33:24,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 198 transitions, 849 flow [2024-11-17 03:33:24,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-17 03:33:24,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-17 03:33:24,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1080 transitions. [2024-11-17 03:33:24,922 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6020066889632107 [2024-11-17 03:33:24,922 INFO L175 Difference]: Start difference. First operand has 133 places, 134 transitions, 385 flow. Second operand 13 states and 1080 transitions. [2024-11-17 03:33:24,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 198 transitions, 849 flow [2024-11-17 03:33:24,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 198 transitions, 837 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:33:24,926 INFO L231 Difference]: Finished difference. Result has 148 places, 160 transitions, 645 flow [2024-11-17 03:33:24,926 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=645, PETRI_PLACES=148, PETRI_TRANSITIONS=160} [2024-11-17 03:33:24,927 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, 22 predicate places. [2024-11-17 03:33:24,927 INFO L471 AbstractCegarLoop]: Abstraction has has 148 places, 160 transitions, 645 flow [2024-11-17 03:33:24,927 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 76.21428571428571) internal successors, (1067), 14 states have internal predecessors, (1067), 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) [2024-11-17 03:33:24,927 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:24,928 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:24,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-17 03:33:25,128 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,SelfDestructingSolverStorable10 [2024-11-17 03:33:25,129 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-17 03:33:25,129 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:25,129 INFO L85 PathProgramCache]: Analyzing trace with hash -767617289, now seen corresponding path program 1 times [2024-11-17 03:33:25,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:25,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564011896] [2024-11-17 03:33:25,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:25,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:25,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:25,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-17 03:33:25,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:25,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564011896] [2024-11-17 03:33:25,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564011896] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:33:25,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:33:25,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:33:25,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487912679] [2024-11-17 03:33:25,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:33:25,222 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:33:25,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:25,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:33:25,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:33:25,253 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 138 [2024-11-17 03:33:25,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 160 transitions, 645 flow. Second operand has 4 states, 4 states have (on average 80.25) internal successors, (321), 4 states have internal predecessors, (321), 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) [2024-11-17 03:33:25,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:25,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 138 [2024-11-17 03:33:25,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:25,934 INFO L124 PetriNetUnfolderBase]: 4528/10035 cut-off events. [2024-11-17 03:33:25,934 INFO L125 PetriNetUnfolderBase]: For 222/222 co-relation queries the response was YES. [2024-11-17 03:33:25,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16369 conditions, 10035 events. 4528/10035 cut-off events. For 222/222 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 91694 event pairs, 2828 based on Foata normal form. 2/7745 useless extension candidates. Maximal degree in co-relation 8154. Up to 6063 conditions per place. [2024-11-17 03:33:25,989 INFO L140 encePairwiseOnDemand]: 134/138 looper letters, 86 selfloop transitions, 7 changer transitions 0/158 dead transitions. [2024-11-17 03:33:25,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 158 transitions, 816 flow [2024-11-17 03:33:25,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:33:25,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:33:25,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 364 transitions. [2024-11-17 03:33:25,991 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6594202898550725 [2024-11-17 03:33:25,991 INFO L175 Difference]: Start difference. First operand has 148 places, 160 transitions, 645 flow. Second operand 4 states and 364 transitions. [2024-11-17 03:33:25,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 158 transitions, 816 flow [2024-11-17 03:33:25,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 158 transitions, 808 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-17 03:33:25,997 INFO L231 Difference]: Finished difference. Result has 150 places, 157 transitions, 640 flow [2024-11-17 03:33:25,997 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=618, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=640, PETRI_PLACES=150, PETRI_TRANSITIONS=157} [2024-11-17 03:33:25,998 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, 24 predicate places. [2024-11-17 03:33:25,998 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 157 transitions, 640 flow [2024-11-17 03:33:25,999 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.25) internal successors, (321), 4 states have internal predecessors, (321), 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) [2024-11-17 03:33:25,999 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:25,999 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:25,999 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-17 03:33:25,999 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-17 03:33:26,000 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:26,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1625088453, now seen corresponding path program 2 times [2024-11-17 03:33:26,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:26,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385149738] [2024-11-17 03:33:26,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:26,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:26,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:26,377 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:33:26,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:26,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385149738] [2024-11-17 03:33:26,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385149738] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:33:26,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370110355] [2024-11-17 03:33:26,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:33:26,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:26,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:26,380 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) [2024-11-17 03:33:26,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-17 03:33:26,513 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:33:26,513 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:33:26,515 INFO L255 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-17 03:33:26,517 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:33:26,623 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 [2024-11-17 03:33:26,682 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:33:26,682 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:33:26,945 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:33:26,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370110355] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:33:26,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:33:26,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2024-11-17 03:33:26,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307348841] [2024-11-17 03:33:26,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:33:26,947 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-17 03:33:26,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:26,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-17 03:33:26,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2024-11-17 03:33:28,138 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 138 [2024-11-17 03:33:28,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 157 transitions, 640 flow. Second operand has 22 states, 22 states have (on average 73.13636363636364) internal successors, (1609), 22 states have internal predecessors, (1609), 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) [2024-11-17 03:33:28,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:28,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 138 [2024-11-17 03:33:28,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:30,760 INFO L124 PetriNetUnfolderBase]: 8925/19679 cut-off events. [2024-11-17 03:33:30,760 INFO L125 PetriNetUnfolderBase]: For 492/492 co-relation queries the response was YES. [2024-11-17 03:33:30,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32263 conditions, 19679 events. 8925/19679 cut-off events. For 492/492 co-relation queries the response was YES. Maximal size of possible extension queue 754. Compared 190166 event pairs, 5616 based on Foata normal form. 1/15364 useless extension candidates. Maximal degree in co-relation 8240. Up to 6057 conditions per place. [2024-11-17 03:33:30,866 INFO L140 encePairwiseOnDemand]: 121/138 looper letters, 183 selfloop transitions, 76 changer transitions 0/317 dead transitions. [2024-11-17 03:33:30,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 317 transitions, 1875 flow [2024-11-17 03:33:30,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-17 03:33:30,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-17 03:33:30,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1700 transitions. [2024-11-17 03:33:30,871 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5866114561766735 [2024-11-17 03:33:30,871 INFO L175 Difference]: Start difference. First operand has 150 places, 157 transitions, 640 flow. Second operand 21 states and 1700 transitions. [2024-11-17 03:33:30,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 317 transitions, 1875 flow [2024-11-17 03:33:30,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 317 transitions, 1849 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:33:30,879 INFO L231 Difference]: Finished difference. Result has 173 places, 210 transitions, 1260 flow [2024-11-17 03:33:30,880 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=626, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1260, PETRI_PLACES=173, PETRI_TRANSITIONS=210} [2024-11-17 03:33:30,880 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, 47 predicate places. [2024-11-17 03:33:30,880 INFO L471 AbstractCegarLoop]: Abstraction has has 173 places, 210 transitions, 1260 flow [2024-11-17 03:33:30,881 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 73.13636363636364) internal successors, (1609), 22 states have internal predecessors, (1609), 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) [2024-11-17 03:33:30,881 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:30,881 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:30,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-17 03:33:31,082 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:31,082 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-17 03:33:31,083 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:31,083 INFO L85 PathProgramCache]: Analyzing trace with hash 2146904713, now seen corresponding path program 1 times [2024-11-17 03:33:31,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:31,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012511300] [2024-11-17 03:33:31,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:31,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:31,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:31,400 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-17 03:33:31,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:31,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012511300] [2024-11-17 03:33:31,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012511300] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:33:31,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644400808] [2024-11-17 03:33:31,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:31,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:31,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:31,403 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) [2024-11-17 03:33:31,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-17 03:33:31,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:31,514 INFO L255 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-17 03:33:31,516 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:33:31,598 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 [2024-11-17 03:33:31,612 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-17 03:33:31,612 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:33:31,753 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-17 03:33:31,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644400808] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:33:31,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:33:31,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2024-11-17 03:33:31,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314314399] [2024-11-17 03:33:31,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:33:31,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-17 03:33:31,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:31,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-17 03:33:31,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-11-17 03:33:32,119 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 138 [2024-11-17 03:33:32,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 210 transitions, 1260 flow. Second operand has 15 states, 15 states have (on average 76.8) internal successors, (1152), 15 states have internal predecessors, (1152), 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) [2024-11-17 03:33:32,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:32,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 138 [2024-11-17 03:33:32,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:36,229 INFO L124 PetriNetUnfolderBase]: 17843/39315 cut-off events. [2024-11-17 03:33:36,230 INFO L125 PetriNetUnfolderBase]: For 1140/1140 co-relation queries the response was YES. [2024-11-17 03:33:36,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64518 conditions, 39315 events. 17843/39315 cut-off events. For 1140/1140 co-relation queries the response was YES. Maximal size of possible extension queue 1446. Compared 422038 event pairs, 11232 based on Foata normal form. 0/30691 useless extension candidates. Maximal degree in co-relation 48530. Up to 12098 conditions per place. [2024-11-17 03:33:36,523 INFO L140 encePairwiseOnDemand]: 127/138 looper letters, 195 selfloop transitions, 54 changer transitions 0/313 dead transitions. [2024-11-17 03:33:36,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 313 transitions, 2378 flow [2024-11-17 03:33:36,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-17 03:33:36,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-17 03:33:36,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 858 transitions. [2024-11-17 03:33:36,526 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6217391304347826 [2024-11-17 03:33:36,526 INFO L175 Difference]: Start difference. First operand has 173 places, 210 transitions, 1260 flow. Second operand 10 states and 858 transitions. [2024-11-17 03:33:36,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 313 transitions, 2378 flow [2024-11-17 03:33:36,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 313 transitions, 2326 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-11-17 03:33:36,538 INFO L231 Difference]: Finished difference. Result has 182 places, 243 transitions, 1736 flow [2024-11-17 03:33:36,538 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=1218, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1736, PETRI_PLACES=182, PETRI_TRANSITIONS=243} [2024-11-17 03:33:36,539 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, 56 predicate places. [2024-11-17 03:33:36,539 INFO L471 AbstractCegarLoop]: Abstraction has has 182 places, 243 transitions, 1736 flow [2024-11-17 03:33:36,539 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 76.8) internal successors, (1152), 15 states have internal predecessors, (1152), 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) [2024-11-17 03:33:36,540 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:36,540 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:36,559 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-17 03:33:36,740 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:36,741 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-17 03:33:36,741 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:36,741 INFO L85 PathProgramCache]: Analyzing trace with hash -137495519, now seen corresponding path program 3 times [2024-11-17 03:33:36,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:36,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322661593] [2024-11-17 03:33:36,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:36,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:36,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:36,907 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-17 03:33:36,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:36,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322661593] [2024-11-17 03:33:36,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322661593] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:33:36,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742876981] [2024-11-17 03:33:36,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-17 03:33:36,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:36,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:36,910 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) [2024-11-17 03:33:36,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-17 03:33:37,021 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-17 03:33:37,022 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:33:37,023 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-17 03:33:37,025 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:33:37,035 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 [2024-11-17 03:33:37,083 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 17 treesize of output 13 [2024-11-17 03:33:37,138 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 [2024-11-17 03:33:37,251 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-17 03:33:37,251 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:33:37,454 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-17 03:33:37,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742876981] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:33:37,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:33:37,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 20 [2024-11-17 03:33:37,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916567705] [2024-11-17 03:33:37,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:33:37,456 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-17 03:33:37,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:37,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-17 03:33:37,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2024-11-17 03:33:38,786 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 138 [2024-11-17 03:33:38,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 243 transitions, 1736 flow. Second operand has 21 states, 21 states have (on average 73.80952380952381) internal successors, (1550), 21 states have internal predecessors, (1550), 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) [2024-11-17 03:33:38,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:38,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 138 [2024-11-17 03:33:38,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:43,396 INFO L124 PetriNetUnfolderBase]: 17837/39283 cut-off events. [2024-11-17 03:33:43,396 INFO L125 PetriNetUnfolderBase]: For 1300/1300 co-relation queries the response was YES. [2024-11-17 03:33:43,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64580 conditions, 39283 events. 17837/39283 cut-off events. For 1300/1300 co-relation queries the response was YES. Maximal size of possible extension queue 1454. Compared 421962 event pairs, 11232 based on Foata normal form. 6/30665 useless extension candidates. Maximal degree in co-relation 48980. Up to 12052 conditions per place. [2024-11-17 03:33:43,714 INFO L140 encePairwiseOnDemand]: 120/138 looper letters, 145 selfloop transitions, 92 changer transitions 0/295 dead transitions. [2024-11-17 03:33:43,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 295 transitions, 2405 flow [2024-11-17 03:33:43,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-17 03:33:43,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-17 03:33:43,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1832 transitions. [2024-11-17 03:33:43,718 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5531400966183575 [2024-11-17 03:33:43,718 INFO L175 Difference]: Start difference. First operand has 182 places, 243 transitions, 1736 flow. Second operand 24 states and 1832 transitions. [2024-11-17 03:33:43,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 295 transitions, 2405 flow [2024-11-17 03:33:43,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 295 transitions, 2390 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-11-17 03:33:43,731 INFO L231 Difference]: Finished difference. Result has 202 places, 247 transitions, 1928 flow [2024-11-17 03:33:43,732 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=1673, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1928, PETRI_PLACES=202, PETRI_TRANSITIONS=247} [2024-11-17 03:33:43,732 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, 76 predicate places. [2024-11-17 03:33:43,732 INFO L471 AbstractCegarLoop]: Abstraction has has 202 places, 247 transitions, 1928 flow [2024-11-17 03:33:43,733 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 73.80952380952381) internal successors, (1550), 21 states have internal predecessors, (1550), 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) [2024-11-17 03:33:43,733 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:43,734 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:43,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-17 03:33:43,934 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,SelfDestructingSolverStorable14 [2024-11-17 03:33:43,934 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-17 03:33:43,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:43,935 INFO L85 PathProgramCache]: Analyzing trace with hash 2081456224, now seen corresponding path program 1 times [2024-11-17 03:33:43,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:43,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992894196] [2024-11-17 03:33:43,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:43,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:43,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:44,058 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-17 03:33:44,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:44,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992894196] [2024-11-17 03:33:44,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992894196] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:33:44,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222715123] [2024-11-17 03:33:44,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:44,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:44,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:44,061 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) [2024-11-17 03:33:44,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-17 03:33:44,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:44,178 INFO L255 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-17 03:33:44,180 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:33:44,261 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-17 03:33:44,262 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:33:44,337 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-17 03:33:44,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222715123] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:33:44,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:33:44,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-17 03:33:44,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890607323] [2024-11-17 03:33:44,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:33:44,339 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-17 03:33:44,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:44,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-17 03:33:44,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-17 03:33:44,649 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 138 [2024-11-17 03:33:44,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 247 transitions, 1928 flow. Second operand has 14 states, 14 states have (on average 76.5) internal successors, (1071), 14 states have internal predecessors, (1071), 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) [2024-11-17 03:33:44,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:44,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 138 [2024-11-17 03:33:44,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:48,629 INFO L124 PetriNetUnfolderBase]: 17833/39271 cut-off events. [2024-11-17 03:33:48,629 INFO L125 PetriNetUnfolderBase]: For 1555/1555 co-relation queries the response was YES. [2024-11-17 03:33:48,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64692 conditions, 39271 events. 17833/39271 cut-off events. For 1555/1555 co-relation queries the response was YES. Maximal size of possible extension queue 1446. Compared 421510 event pairs, 11232 based on Foata normal form. 4/30667 useless extension candidates. Maximal degree in co-relation 33500. Up to 12068 conditions per place. [2024-11-17 03:33:48,916 INFO L140 encePairwiseOnDemand]: 120/138 looper letters, 141 selfloop transitions, 124 changer transitions 0/325 dead transitions. [2024-11-17 03:33:48,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 325 transitions, 2942 flow [2024-11-17 03:33:48,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-17 03:33:48,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-17 03:33:48,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1076 transitions. [2024-11-17 03:33:48,918 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5997770345596433 [2024-11-17 03:33:48,918 INFO L175 Difference]: Start difference. First operand has 202 places, 247 transitions, 1928 flow. Second operand 13 states and 1076 transitions. [2024-11-17 03:33:48,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 325 transitions, 2942 flow [2024-11-17 03:33:48,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 325 transitions, 2811 flow, removed 16 selfloop flow, removed 12 redundant places. [2024-11-17 03:33:48,932 INFO L231 Difference]: Finished difference. Result has 204 places, 269 transitions, 2376 flow [2024-11-17 03:33:48,932 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=1853, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2376, PETRI_PLACES=204, PETRI_TRANSITIONS=269} [2024-11-17 03:33:48,933 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, 78 predicate places. [2024-11-17 03:33:48,933 INFO L471 AbstractCegarLoop]: Abstraction has has 204 places, 269 transitions, 2376 flow [2024-11-17 03:33:48,934 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 76.5) internal successors, (1071), 14 states have internal predecessors, (1071), 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) [2024-11-17 03:33:48,934 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:48,934 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:48,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-17 03:33:49,134 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-17 03:33:49,135 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-17 03:33:49,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:49,136 INFO L85 PathProgramCache]: Analyzing trace with hash 2081703690, now seen corresponding path program 1 times [2024-11-17 03:33:49,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:49,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089447677] [2024-11-17 03:33:49,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:49,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:49,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:49,230 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-17 03:33:49,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:49,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089447677] [2024-11-17 03:33:49,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089447677] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:33:49,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:33:49,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:33:49,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089327089] [2024-11-17 03:33:49,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:33:49,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:33:49,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:49,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:33:49,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:33:49,257 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 138 [2024-11-17 03:33:49,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 269 transitions, 2376 flow. Second operand has 4 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 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) [2024-11-17 03:33:49,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:49,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 138 [2024-11-17 03:33:49,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:33:53,680 INFO L124 PetriNetUnfolderBase]: 18097/40087 cut-off events. [2024-11-17 03:33:53,680 INFO L125 PetriNetUnfolderBase]: For 1788/1788 co-relation queries the response was YES. [2024-11-17 03:33:53,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65848 conditions, 40087 events. 18097/40087 cut-off events. For 1788/1788 co-relation queries the response was YES. Maximal size of possible extension queue 1466. Compared 433051 event pairs, 11312 based on Foata normal form. 8/30927 useless extension candidates. Maximal degree in co-relation 49648. Up to 24228 conditions per place. [2024-11-17 03:33:54,002 INFO L140 encePairwiseOnDemand]: 134/138 looper letters, 178 selfloop transitions, 11 changer transitions 0/261 dead transitions. [2024-11-17 03:33:54,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 261 transitions, 2653 flow [2024-11-17 03:33:54,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:33:54,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:33:54,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 364 transitions. [2024-11-17 03:33:54,003 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6594202898550725 [2024-11-17 03:33:54,003 INFO L175 Difference]: Start difference. First operand has 204 places, 269 transitions, 2376 flow. Second operand 4 states and 364 transitions. [2024-11-17 03:33:54,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 261 transitions, 2653 flow [2024-11-17 03:33:54,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 261 transitions, 2451 flow, removed 32 selfloop flow, removed 9 redundant places. [2024-11-17 03:33:54,014 INFO L231 Difference]: Finished difference. Result has 198 places, 260 transitions, 2107 flow [2024-11-17 03:33:54,014 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=2069, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2107, PETRI_PLACES=198, PETRI_TRANSITIONS=260} [2024-11-17 03:33:54,015 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, 72 predicate places. [2024-11-17 03:33:54,015 INFO L471 AbstractCegarLoop]: Abstraction has has 198 places, 260 transitions, 2107 flow [2024-11-17 03:33:54,015 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 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) [2024-11-17 03:33:54,015 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:33:54,016 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:33:54,016 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-17 03:33:54,016 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-17 03:33:54,016 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:33:54,016 INFO L85 PathProgramCache]: Analyzing trace with hash 383869024, now seen corresponding path program 2 times [2024-11-17 03:33:54,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:33:54,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483161160] [2024-11-17 03:33:54,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:33:54,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:33:54,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:33:54,328 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-17 03:33:54,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:33:54,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483161160] [2024-11-17 03:33:54,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483161160] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:33:54,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002174559] [2024-11-17 03:33:54,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-17 03:33:54,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:33:54,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:33:54,330 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) [2024-11-17 03:33:54,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-17 03:33:54,517 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-17 03:33:54,517 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-17 03:33:54,519 INFO L255 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-17 03:33:54,520 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:33:54,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:33:54,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 36 [2024-11-17 03:33:54,649 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 0 case distinctions, treesize of input 14 treesize of output 3 [2024-11-17 03:33:54,745 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-17 03:33:54,746 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:33:54,922 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-17 03:33:54,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002174559] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:33:54,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:33:54,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 21 [2024-11-17 03:33:54,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765531268] [2024-11-17 03:33:54,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:33:54,923 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-17 03:33:54,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:33:54,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-17 03:33:54,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2024-11-17 03:33:56,095 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 138 [2024-11-17 03:33:56,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 260 transitions, 2107 flow. Second operand has 22 states, 22 states have (on average 74.13636363636364) internal successors, (1631), 22 states have internal predecessors, (1631), 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) [2024-11-17 03:33:56,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:33:56,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 138 [2024-11-17 03:33:56,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:34:02,728 INFO L124 PetriNetUnfolderBase]: 26600/58475 cut-off events. [2024-11-17 03:34:02,728 INFO L125 PetriNetUnfolderBase]: For 2233/2233 co-relation queries the response was YES. [2024-11-17 03:34:03,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96359 conditions, 58475 events. 26600/58475 cut-off events. For 2233/2233 co-relation queries the response was YES. Maximal size of possible extension queue 1921. Compared 654102 event pairs, 16808 based on Foata normal form. 8/45831 useless extension candidates. Maximal degree in co-relation 72623. Up to 12116 conditions per place. [2024-11-17 03:34:03,320 INFO L140 encePairwiseOnDemand]: 123/138 looper letters, 295 selfloop transitions, 86 changer transitions 0/439 dead transitions. [2024-11-17 03:34:03,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 439 transitions, 4127 flow [2024-11-17 03:34:03,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-17 03:34:03,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-17 03:34:03,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1313 transitions. [2024-11-17 03:34:03,323 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5946557971014492 [2024-11-17 03:34:03,323 INFO L175 Difference]: Start difference. First operand has 198 places, 260 transitions, 2107 flow. Second operand 16 states and 1313 transitions. [2024-11-17 03:34:03,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 439 transitions, 4127 flow [2024-11-17 03:34:03,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 439 transitions, 4095 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-17 03:34:03,340 INFO L231 Difference]: Finished difference. Result has 216 places, 315 transitions, 3119 flow [2024-11-17 03:34:03,341 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=2085, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3119, PETRI_PLACES=216, PETRI_TRANSITIONS=315} [2024-11-17 03:34:03,341 INFO L277 CegarLoopForPetriNet]: 126 programPoint places, 90 predicate places. [2024-11-17 03:34:03,341 INFO L471 AbstractCegarLoop]: Abstraction has has 216 places, 315 transitions, 3119 flow [2024-11-17 03:34:03,342 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 74.13636363636364) internal successors, (1631), 22 states have internal predecessors, (1631), 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) [2024-11-17 03:34:03,342 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:34:03,342 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:34:03,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-17 03:34:03,542 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,SelfDestructingSolverStorable17 [2024-11-17 03:34:03,542 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-17 03:34:03,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:34:03,543 INFO L85 PathProgramCache]: Analyzing trace with hash -2074047021, now seen corresponding path program 1 times [2024-11-17 03:34:03,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:34:03,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388414933] [2024-11-17 03:34:03,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:34:03,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:34:03,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:34:03,973 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-17 03:34:03,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:34:03,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388414933] [2024-11-17 03:34:03,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388414933] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:34:03,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383147160] [2024-11-17 03:34:03,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:34:03,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:34:03,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:34:03,977 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) [2024-11-17 03:34:03,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-17 03:34:04,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:34:04,171 INFO L255 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-17 03:34:04,173 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:34:04,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:34:04,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 36 [2024-11-17 03:34:04,306 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 0 case distinctions, treesize of input 14 treesize of output 3 [2024-11-17 03:34:04,352 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-17 03:34:04,353 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-17 03:34:04,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383147160] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:34:04,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-17 03:34:04,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2024-11-17 03:34:04,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876619006] [2024-11-17 03:34:04,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:34:04,354 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:34:04,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:34:04,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:34:04,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-17 03:34:04,467 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 138 [2024-11-17 03:34:04,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 315 transitions, 3119 flow. Second operand has 4 states, 4 states have (on average 81.5) internal successors, (326), 4 states have internal predecessors, (326), 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) [2024-11-17 03:34:04,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:34:04,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 138 [2024-11-17 03:34:04,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand