./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-buffer-series.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/popl20-more-buffer-series.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 8dbd267b0e0821e8d358e8d234024d8e484ea32431972ed8b70b87052179a50c --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-17 03:38:31,290 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 03:38:31,337 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-17 03:38:31,343 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 03:38:31,344 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 03:38:31,362 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 03:38:31,363 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 03:38:31,364 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 03:38:31,364 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 03:38:31,365 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 03:38:31,366 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-17 03:38:31,366 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-17 03:38:31,366 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 03:38:31,368 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 03:38:31,368 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 03:38:31,368 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 03:38:31,368 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 03:38:31,369 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 03:38:31,369 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 03:38:31,369 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 03:38:31,370 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-17 03:38:31,372 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-17 03:38:31,372 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-17 03:38:31,373 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-17 03:38:31,373 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-17 03:38:31,373 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 03:38:31,373 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 03:38:31,373 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 03:38:31,373 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 03:38:31,374 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 03:38:31,374 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 03:38:31,374 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-17 03:38:31,374 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-17 03:38:31,374 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:38:31,374 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 03:38:31,374 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-17 03:38:31,375 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 03:38:31,375 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-17 03:38:31,375 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-17 03:38:31,375 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-17 03:38:31,375 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-17 03:38:31,375 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-17 03:38:31,375 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8dbd267b0e0821e8d358e8d234024d8e484ea32431972ed8b70b87052179a50c [2024-11-17 03:38:31,588 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 03:38:31,610 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 03:38:31,613 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 03:38:31,614 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 03:38:31,614 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 03:38:31,615 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2024-11-17 03:38:32,851 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 03:38:33,012 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 03:38:33,012 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2024-11-17 03:38:33,019 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/742bb23cf/d0eaa72941334c758476bd8e1b3d922f/FLAGefa442660 [2024-11-17 03:38:33,416 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/742bb23cf/d0eaa72941334c758476bd8e1b3d922f [2024-11-17 03:38:33,418 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 03:38:33,419 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 03:38:33,420 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 03:38:33,420 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 03:38:33,424 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 03:38:33,424 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:38:33" (1/1) ... [2024-11-17 03:38:33,425 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@269da782 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:33, skipping insertion in model container [2024-11-17 03:38:33,425 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:38:33" (1/1) ... [2024-11-17 03:38:33,444 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 03:38:33,610 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 03:38:33,614 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:38:33,620 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 03:38:33,648 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:38:33,662 INFO L204 MainTranslator]: Completed translation [2024-11-17 03:38:33,663 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:33 WrapperNode [2024-11-17 03:38:33,663 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 03:38:33,664 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 03:38:33,664 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 03:38:33,664 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 03:38:33,669 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:33" (1/1) ... [2024-11-17 03:38:33,676 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:33" (1/1) ... [2024-11-17 03:38:33,700 INFO L138 Inliner]: procedures = 26, calls = 68, calls flagged for inlining = 23, calls inlined = 29, statements flattened = 335 [2024-11-17 03:38:33,702 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 03:38:33,703 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 03:38:33,703 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 03:38:33,703 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 03:38:33,713 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:33" (1/1) ... [2024-11-17 03:38:33,713 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:33" (1/1) ... [2024-11-17 03:38:33,717 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:33" (1/1) ... [2024-11-17 03:38:33,736 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-17 03:38:33,737 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:33" (1/1) ... [2024-11-17 03:38:33,737 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:33" (1/1) ... [2024-11-17 03:38:33,744 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:33" (1/1) ... [2024-11-17 03:38:33,745 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:33" (1/1) ... [2024-11-17 03:38:33,746 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:33" (1/1) ... [2024-11-17 03:38:33,747 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:33" (1/1) ... [2024-11-17 03:38:33,750 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 03:38:33,750 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 03:38:33,750 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 03:38:33,751 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 03:38:33,751 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:33" (1/1) ... [2024-11-17 03:38:33,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:38:33,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:38:33,785 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 03:38:33,787 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 03:38:33,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 03:38:33,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-17 03:38:33,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-17 03:38:33,831 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-17 03:38:33,831 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-17 03:38:33,831 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-17 03:38:33,831 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-17 03:38:33,831 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-17 03:38:33,832 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-17 03:38:33,833 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-17 03:38:33,833 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-17 03:38:33,833 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-17 03:38:33,833 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-17 03:38:33,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 03:38:33,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-17 03:38:33,833 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-17 03:38:33,834 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-17 03:38:33,834 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-17 03:38:33,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 03:38:33,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 03:38:33,836 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 03:38:33,968 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 03:38:33,970 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 03:38:34,376 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-17 03:38:34,377 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 03:38:34,661 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 03:38:34,661 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 03:38:34,662 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:38:34 BoogieIcfgContainer [2024-11-17 03:38:34,662 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 03:38:34,664 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-17 03:38:34,664 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-17 03:38:34,667 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-17 03:38:34,667 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:38:33" (1/3) ... [2024-11-17 03:38:34,667 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18628668 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:38:34, skipping insertion in model container [2024-11-17 03:38:34,667 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:33" (2/3) ... [2024-11-17 03:38:34,669 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18628668 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:38:34, skipping insertion in model container [2024-11-17 03:38:34,669 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:38:34" (3/3) ... [2024-11-17 03:38:34,670 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series.wvr.c [2024-11-17 03:38:34,683 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-17 03:38:34,684 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2024-11-17 03:38:34,684 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-17 03:38:34,769 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-17 03:38:34,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 98 transitions, 224 flow [2024-11-17 03:38:34,834 INFO L124 PetriNetUnfolderBase]: 14/94 cut-off events. [2024-11-17 03:38:34,835 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-17 03:38:34,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 94 events. 14/94 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 237 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 78. Up to 2 conditions per place. [2024-11-17 03:38:34,841 INFO L82 GeneralOperation]: Start removeDead. Operand has 97 places, 98 transitions, 224 flow [2024-11-17 03:38:34,845 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 92 places, 93 transitions, 210 flow [2024-11-17 03:38:34,853 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:38:34,860 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;@18fee2b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:38:34,860 INFO L334 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2024-11-17 03:38:34,863 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:38:34,863 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-17 03:38:34,864 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:38:34,864 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:34,864 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:38:34,865 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:38:34,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:34,869 INFO L85 PathProgramCache]: Analyzing trace with hash 29557156, now seen corresponding path program 1 times [2024-11-17 03:38:34,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:34,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235396262] [2024-11-17 03:38:34,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:34,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:34,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:35,096 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 03:38:35,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:35,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235396262] [2024-11-17 03:38:35,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235396262] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:38:35,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:38:35,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:38:35,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409404493] [2024-11-17 03:38:35,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:38:35,106 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:38:35,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:35,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:38:35,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:38:35,149 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 98 [2024-11-17 03:38:35,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 93 transitions, 210 flow. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 03:38:35,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:35,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 98 [2024-11-17 03:38:35,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:37,996 INFO L124 PetriNetUnfolderBase]: 24724/34113 cut-off events. [2024-11-17 03:38:37,996 INFO L125 PetriNetUnfolderBase]: For 559/559 co-relation queries the response was YES. [2024-11-17 03:38:38,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67723 conditions, 34113 events. 24724/34113 cut-off events. For 559/559 co-relation queries the response was YES. Maximal size of possible extension queue 2428. Compared 244222 event pairs, 20908 based on Foata normal form. 3817/25081 useless extension candidates. Maximal degree in co-relation 64480. Up to 32075 conditions per place. [2024-11-17 03:38:38,271 INFO L140 encePairwiseOnDemand]: 83/98 looper letters, 51 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2024-11-17 03:38:38,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 79 transitions, 288 flow [2024-11-17 03:38:38,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:38:38,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:38:38,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 159 transitions. [2024-11-17 03:38:38,282 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5408163265306123 [2024-11-17 03:38:38,283 INFO L175 Difference]: Start difference. First operand has 92 places, 93 transitions, 210 flow. Second operand 3 states and 159 transitions. [2024-11-17 03:38:38,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 79 transitions, 288 flow [2024-11-17 03:38:38,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 79 transitions, 272 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-17 03:38:38,502 INFO L231 Difference]: Finished difference. Result has 79 places, 79 transitions, 170 flow [2024-11-17 03:38:38,504 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=98, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=79, PETRI_TRANSITIONS=79} [2024-11-17 03:38:38,506 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, -13 predicate places. [2024-11-17 03:38:38,507 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 79 transitions, 170 flow [2024-11-17 03:38:38,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 03:38:38,507 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:38,507 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:38:38,507 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-17 03:38:38,507 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:38:38,508 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:38,508 INFO L85 PathProgramCache]: Analyzing trace with hash 29557157, now seen corresponding path program 1 times [2024-11-17 03:38:38,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:38,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020191419] [2024-11-17 03:38:38,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:38,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:38,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:38,744 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 03:38:38,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:38,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020191419] [2024-11-17 03:38:38,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020191419] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:38:38,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:38:38,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:38:38,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56200086] [2024-11-17 03:38:38,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:38:38,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:38:38,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:38,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:38:38,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:38:38,773 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 98 [2024-11-17 03:38:38,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 79 transitions, 170 flow. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 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 03:38:38,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:38,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 98 [2024-11-17 03:38:38,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:40,927 INFO L124 PetriNetUnfolderBase]: 24725/34118 cut-off events. [2024-11-17 03:38:40,928 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2024-11-17 03:38:40,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66789 conditions, 34118 events. 24725/34118 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 2428. Compared 244155 event pairs, 20908 based on Foata normal form. 0/21266 useless extension candidates. Maximal degree in co-relation 66744. Up to 32088 conditions per place. [2024-11-17 03:38:41,109 INFO L140 encePairwiseOnDemand]: 93/98 looper letters, 55 selfloop transitions, 4 changer transitions 0/82 dead transitions. [2024-11-17 03:38:41,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 82 transitions, 294 flow [2024-11-17 03:38:41,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:38:41,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:38:41,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 184 transitions. [2024-11-17 03:38:41,113 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46938775510204084 [2024-11-17 03:38:41,113 INFO L175 Difference]: Start difference. First operand has 79 places, 79 transitions, 170 flow. Second operand 4 states and 184 transitions. [2024-11-17 03:38:41,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 82 transitions, 294 flow [2024-11-17 03:38:41,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 82 transitions, 290 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:38:41,115 INFO L231 Difference]: Finished difference. Result has 82 places, 82 transitions, 193 flow [2024-11-17 03:38:41,116 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=98, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=193, PETRI_PLACES=82, PETRI_TRANSITIONS=82} [2024-11-17 03:38:41,116 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, -10 predicate places. [2024-11-17 03:38:41,116 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 82 transitions, 193 flow [2024-11-17 03:38:41,117 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 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 03:38:41,117 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:41,117 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-17 03:38:41,117 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-17 03:38:41,118 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:38:41,119 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:41,119 INFO L85 PathProgramCache]: Analyzing trace with hash 69926304, now seen corresponding path program 1 times [2024-11-17 03:38:41,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:41,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223199684] [2024-11-17 03:38:41,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:41,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:41,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:41,384 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 03:38:41,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:41,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223199684] [2024-11-17 03:38:41,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223199684] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:38:41,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320196074] [2024-11-17 03:38:41,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:41,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:41,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:38:41,388 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 03:38:41,389 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 03:38:41,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:41,576 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-17 03:38:41,579 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:38:41,631 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 03:38:41,756 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:41,756 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:38:41,876 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 03:38:41,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320196074] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:38:41,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:38:41,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-17 03:38:41,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42453623] [2024-11-17 03:38:41,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:38:41,877 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-17 03:38:41,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:41,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-17 03:38:41,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-17 03:38:41,948 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 98 [2024-11-17 03:38:41,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 82 transitions, 193 flow. Second operand has 11 states, 11 states have (on average 29.363636363636363) internal successors, (323), 11 states have internal predecessors, (323), 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 03:38:41,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:41,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 98 [2024-11-17 03:38:41,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:44,401 INFO L124 PetriNetUnfolderBase]: 24725/34117 cut-off events. [2024-11-17 03:38:44,401 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-11-17 03:38:44,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66801 conditions, 34117 events. 24725/34117 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 2428. Compared 244412 event pairs, 20908 based on Foata normal form. 0/21264 useless extension candidates. Maximal degree in co-relation 66776. Up to 32084 conditions per place. [2024-11-17 03:38:44,594 INFO L140 encePairwiseOnDemand]: 89/98 looper letters, 51 selfloop transitions, 11 changer transitions 0/82 dead transitions. [2024-11-17 03:38:44,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 82 transitions, 315 flow [2024-11-17 03:38:44,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-17 03:38:44,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-17 03:38:44,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 259 transitions. [2024-11-17 03:38:44,597 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-11-17 03:38:44,597 INFO L175 Difference]: Start difference. First operand has 82 places, 82 transitions, 193 flow. Second operand 7 states and 259 transitions. [2024-11-17 03:38:44,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 82 transitions, 315 flow [2024-11-17 03:38:44,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 82 transitions, 312 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:38:44,599 INFO L231 Difference]: Finished difference. Result has 86 places, 81 transitions, 208 flow [2024-11-17 03:38:44,601 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=98, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=208, PETRI_PLACES=86, PETRI_TRANSITIONS=81} [2024-11-17 03:38:44,602 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, -6 predicate places. [2024-11-17 03:38:44,602 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 81 transitions, 208 flow [2024-11-17 03:38:44,602 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 29.363636363636363) internal successors, (323), 11 states have internal predecessors, (323), 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 03:38:44,602 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:44,603 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:44,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-17 03:38:44,807 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 03:38:44,808 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:38:44,809 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:44,810 INFO L85 PathProgramCache]: Analyzing trace with hash 71359097, now seen corresponding path program 1 times [2024-11-17 03:38:44,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:44,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210796867] [2024-11-17 03:38:44,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:44,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:44,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:44,945 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 03:38:44,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:44,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210796867] [2024-11-17 03:38:44,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210796867] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:38:44,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:38:44,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:38:44,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330039405] [2024-11-17 03:38:44,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:38:44,947 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:38:44,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:44,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:38:44,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:38:44,972 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 98 [2024-11-17 03:38:44,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 81 transitions, 208 flow. Second operand has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:38:44,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:44,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 98 [2024-11-17 03:38:44,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:46,868 INFO L124 PetriNetUnfolderBase]: 24726/34122 cut-off events. [2024-11-17 03:38:46,868 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-11-17 03:38:46,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66816 conditions, 34122 events. 24726/34122 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 2428. Compared 244008 event pairs, 20908 based on Foata normal form. 0/21271 useless extension candidates. Maximal degree in co-relation 66788. Up to 32086 conditions per place. [2024-11-17 03:38:47,261 INFO L140 encePairwiseOnDemand]: 90/98 looper letters, 54 selfloop transitions, 7 changer transitions 0/84 dead transitions. [2024-11-17 03:38:47,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 84 transitions, 338 flow [2024-11-17 03:38:47,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:38:47,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:38:47,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 217 transitions. [2024-11-17 03:38:47,268 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-11-17 03:38:47,268 INFO L175 Difference]: Start difference. First operand has 86 places, 81 transitions, 208 flow. Second operand 5 states and 217 transitions. [2024-11-17 03:38:47,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 84 transitions, 338 flow [2024-11-17 03:38:47,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 84 transitions, 305 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-17 03:38:47,272 INFO L231 Difference]: Finished difference. Result has 85 places, 84 transitions, 214 flow [2024-11-17 03:38:47,272 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=98, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=214, PETRI_PLACES=85, PETRI_TRANSITIONS=84} [2024-11-17 03:38:47,274 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, -7 predicate places. [2024-11-17 03:38:47,274 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 84 transitions, 214 flow [2024-11-17 03:38:47,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.8) internal successors, (159), 5 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:38:47,275 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:47,275 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:47,275 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-17 03:38:47,275 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:38:47,276 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:47,276 INFO L85 PathProgramCache]: Analyzing trace with hash -149051753, now seen corresponding path program 1 times [2024-11-17 03:38:47,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:47,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865393198] [2024-11-17 03:38:47,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:47,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:47,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:47,485 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 03:38:47,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:47,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865393198] [2024-11-17 03:38:47,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865393198] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:38:47,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496886887] [2024-11-17 03:38:47,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:47,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:47,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:38:47,489 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 03:38:47,490 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 03:38:47,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:47,559 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-17 03:38:47,561 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:38:47,574 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 03:38:47,753 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 03:38:47,754 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:38:47,928 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 03:38:47,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496886887] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:38:47,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:38:47,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-17 03:38:47,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187744004] [2024-11-17 03:38:47,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:38:47,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-17 03:38:47,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:47,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-17 03:38:47,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-17 03:38:48,022 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 98 [2024-11-17 03:38:48,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 84 transitions, 214 flow. Second operand has 13 states, 13 states have (on average 29.46153846153846) internal successors, (383), 13 states have internal predecessors, (383), 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 03:38:48,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:48,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 98 [2024-11-17 03:38:48,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:50,520 INFO L124 PetriNetUnfolderBase]: 24728/34131 cut-off events. [2024-11-17 03:38:50,520 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2024-11-17 03:38:50,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66839 conditions, 34131 events. 24728/34131 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 2428. Compared 244151 event pairs, 20908 based on Foata normal form. 0/21280 useless extension candidates. Maximal degree in co-relation 66771. Up to 32080 conditions per place. [2024-11-17 03:38:50,693 INFO L140 encePairwiseOnDemand]: 88/98 looper letters, 53 selfloop transitions, 20 changer transitions 0/93 dead transitions. [2024-11-17 03:38:50,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 93 transitions, 388 flow [2024-11-17 03:38:50,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-17 03:38:50,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-17 03:38:50,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 355 transitions. [2024-11-17 03:38:50,695 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3622448979591837 [2024-11-17 03:38:50,695 INFO L175 Difference]: Start difference. First operand has 85 places, 84 transitions, 214 flow. Second operand 10 states and 355 transitions. [2024-11-17 03:38:50,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 93 transitions, 388 flow [2024-11-17 03:38:50,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 93 transitions, 382 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:38:50,697 INFO L231 Difference]: Finished difference. Result has 91 places, 89 transitions, 268 flow [2024-11-17 03:38:50,697 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=98, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=268, PETRI_PLACES=91, PETRI_TRANSITIONS=89} [2024-11-17 03:38:50,698 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, -1 predicate places. [2024-11-17 03:38:50,698 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 89 transitions, 268 flow [2024-11-17 03:38:50,698 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 29.46153846153846) internal successors, (383), 13 states have internal predecessors, (383), 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 03:38:50,698 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:50,699 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:50,711 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 03:38:50,900 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 03:38:50,900 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:38:50,901 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:50,901 INFO L85 PathProgramCache]: Analyzing trace with hash -150932271, now seen corresponding path program 1 times [2024-11-17 03:38:50,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:50,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167761400] [2024-11-17 03:38:50,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:50,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:50,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:51,013 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 03:38:51,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:51,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167761400] [2024-11-17 03:38:51,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167761400] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:38:51,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:38:51,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:38:51,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032326587] [2024-11-17 03:38:51,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:38:51,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:38:51,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:51,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:38:51,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:38:51,047 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 98 [2024-11-17 03:38:51,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 89 transitions, 268 flow. Second operand has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 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 03:38:51,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:51,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 98 [2024-11-17 03:38:51,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:53,492 INFO L124 PetriNetUnfolderBase]: 24729/34136 cut-off events. [2024-11-17 03:38:53,493 INFO L125 PetriNetUnfolderBase]: For 86/86 co-relation queries the response was YES. [2024-11-17 03:38:53,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66859 conditions, 34136 events. 24729/34136 cut-off events. For 86/86 co-relation queries the response was YES. Maximal size of possible extension queue 2428. Compared 244149 event pairs, 20908 based on Foata normal form. 0/21286 useless extension candidates. Maximal degree in co-relation 66781. Up to 32093 conditions per place. [2024-11-17 03:38:53,618 INFO L140 encePairwiseOnDemand]: 89/98 looper letters, 59 selfloop transitions, 10 changer transitions 0/92 dead transitions. [2024-11-17 03:38:53,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 92 transitions, 414 flow [2024-11-17 03:38:53,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:38:53,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:38:53,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 216 transitions. [2024-11-17 03:38:53,619 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44081632653061226 [2024-11-17 03:38:53,619 INFO L175 Difference]: Start difference. First operand has 91 places, 89 transitions, 268 flow. Second operand 5 states and 216 transitions. [2024-11-17 03:38:53,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 92 transitions, 414 flow [2024-11-17 03:38:53,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 92 transitions, 372 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-17 03:38:53,621 INFO L231 Difference]: Finished difference. Result has 90 places, 92 transitions, 274 flow [2024-11-17 03:38:53,622 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=98, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=274, PETRI_PLACES=90, PETRI_TRANSITIONS=92} [2024-11-17 03:38:53,622 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, -2 predicate places. [2024-11-17 03:38:53,625 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 92 transitions, 274 flow [2024-11-17 03:38:53,625 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 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 03:38:53,625 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:53,625 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:53,626 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-17 03:38:53,626 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:38:53,626 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:53,626 INFO L85 PathProgramCache]: Analyzing trace with hash 408370906, now seen corresponding path program 1 times [2024-11-17 03:38:53,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:53,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25602648] [2024-11-17 03:38:53,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:53,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:53,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:53,812 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 03:38:53,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:53,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25602648] [2024-11-17 03:38:53,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25602648] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:38:53,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663093430] [2024-11-17 03:38:53,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:53,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:53,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:38:53,815 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 03:38:53,816 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 03:38:53,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:53,876 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-17 03:38:53,877 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:38:53,895 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 03:38:54,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:38:54,036 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:38:54,180 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 03:38:54,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663093430] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:38:54,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:38:54,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-17 03:38:54,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917270768] [2024-11-17 03:38:54,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:38:54,181 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-17 03:38:54,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:54,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-17 03:38:54,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-17 03:38:54,248 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 98 [2024-11-17 03:38:54,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 92 transitions, 274 flow. Second operand has 13 states, 13 states have (on average 29.76923076923077) internal successors, (387), 13 states have internal predecessors, (387), 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 03:38:54,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:54,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 98 [2024-11-17 03:38:54,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:56,248 INFO L124 PetriNetUnfolderBase]: 24729/34135 cut-off events. [2024-11-17 03:38:56,248 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2024-11-17 03:38:56,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66861 conditions, 34135 events. 24729/34135 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 2428. Compared 244211 event pairs, 20908 based on Foata normal form. 0/21286 useless extension candidates. Maximal degree in co-relation 66799. Up to 32084 conditions per place. [2024-11-17 03:38:56,408 INFO L140 encePairwiseOnDemand]: 88/98 looper letters, 53 selfloop transitions, 20 changer transitions 0/93 dead transitions. [2024-11-17 03:38:56,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 93 transitions, 420 flow [2024-11-17 03:38:56,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-17 03:38:56,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-17 03:38:56,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 289 transitions. [2024-11-17 03:38:56,409 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36862244897959184 [2024-11-17 03:38:56,409 INFO L175 Difference]: Start difference. First operand has 90 places, 92 transitions, 274 flow. Second operand 8 states and 289 transitions. [2024-11-17 03:38:56,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 93 transitions, 420 flow [2024-11-17 03:38:56,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 93 transitions, 412 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:38:56,411 INFO L231 Difference]: Finished difference. Result has 94 places, 91 transitions, 302 flow [2024-11-17 03:38:56,412 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=98, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=302, PETRI_PLACES=94, PETRI_TRANSITIONS=91} [2024-11-17 03:38:56,412 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, 2 predicate places. [2024-11-17 03:38:56,412 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 91 transitions, 302 flow [2024-11-17 03:38:56,413 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 29.76923076923077) internal successors, (387), 13 states have internal predecessors, (387), 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 03:38:56,413 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:56,413 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:56,425 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-17 03:38:56,613 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:38:56,614 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:38:56,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:56,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1736125208, now seen corresponding path program 1 times [2024-11-17 03:38:56,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:56,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738449804] [2024-11-17 03:38:56,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:56,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:56,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:56,668 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 03:38:56,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:56,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738449804] [2024-11-17 03:38:56,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738449804] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:38:56,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:38:56,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:38:56,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326855771] [2024-11-17 03:38:56,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:38:56,670 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:38:56,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:56,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:38:56,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:38:56,679 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 98 [2024-11-17 03:38:56,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 91 transitions, 302 flow. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 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 03:38:56,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:56,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 98 [2024-11-17 03:38:56,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:38:59,378 INFO L124 PetriNetUnfolderBase]: 28428/39638 cut-off events. [2024-11-17 03:38:59,378 INFO L125 PetriNetUnfolderBase]: For 130/130 co-relation queries the response was YES. [2024-11-17 03:38:59,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77619 conditions, 39638 events. 28428/39638 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 2689. Compared 290643 event pairs, 24260 based on Foata normal form. 780/26578 useless extension candidates. Maximal degree in co-relation 66825. Up to 32103 conditions per place. [2024-11-17 03:38:59,566 INFO L140 encePairwiseOnDemand]: 83/98 looper letters, 115 selfloop transitions, 8 changer transitions 0/143 dead transitions. [2024-11-17 03:38:59,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 143 transitions, 717 flow [2024-11-17 03:38:59,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:38:59,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:38:59,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 271 transitions. [2024-11-17 03:38:59,570 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5530612244897959 [2024-11-17 03:38:59,570 INFO L175 Difference]: Start difference. First operand has 94 places, 91 transitions, 302 flow. Second operand 5 states and 271 transitions. [2024-11-17 03:38:59,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 143 transitions, 717 flow [2024-11-17 03:38:59,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 143 transitions, 647 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-17 03:38:59,573 INFO L231 Difference]: Finished difference. Result has 94 places, 97 transitions, 340 flow [2024-11-17 03:38:59,573 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=98, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=340, PETRI_PLACES=94, PETRI_TRANSITIONS=97} [2024-11-17 03:38:59,574 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, 2 predicate places. [2024-11-17 03:38:59,574 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 97 transitions, 340 flow [2024-11-17 03:38:59,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 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 03:38:59,574 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:38:59,574 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:38:59,574 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-17 03:38:59,575 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:38:59,575 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:38:59,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1656063216, now seen corresponding path program 1 times [2024-11-17 03:38:59,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:38:59,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354139051] [2024-11-17 03:38:59,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:38:59,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:38:59,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:38:59,664 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 03:38:59,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:38:59,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354139051] [2024-11-17 03:38:59,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354139051] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:38:59,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:38:59,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:38:59,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834910805] [2024-11-17 03:38:59,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:38:59,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:38:59,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:38:59,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:38:59,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:38:59,679 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 98 [2024-11-17 03:38:59,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 97 transitions, 340 flow. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 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 03:38:59,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:38:59,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 98 [2024-11-17 03:38:59,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:39:02,819 INFO L124 PetriNetUnfolderBase]: 32871/46503 cut-off events. [2024-11-17 03:39:02,819 INFO L125 PetriNetUnfolderBase]: For 2434/2434 co-relation queries the response was YES. [2024-11-17 03:39:02,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99811 conditions, 46503 events. 32871/46503 cut-off events. For 2434/2434 co-relation queries the response was YES. Maximal size of possible extension queue 2810. Compared 353252 event pairs, 28321 based on Foata normal form. 713/31857 useless extension candidates. Maximal degree in co-relation 87145. Up to 37195 conditions per place. [2024-11-17 03:39:03,029 INFO L140 encePairwiseOnDemand]: 85/98 looper letters, 110 selfloop transitions, 10 changer transitions 0/140 dead transitions. [2024-11-17 03:39:03,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 140 transitions, 715 flow [2024-11-17 03:39:03,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-17 03:39:03,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-17 03:39:03,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 263 transitions. [2024-11-17 03:39:03,030 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.536734693877551 [2024-11-17 03:39:03,030 INFO L175 Difference]: Start difference. First operand has 94 places, 97 transitions, 340 flow. Second operand 5 states and 263 transitions. [2024-11-17 03:39:03,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 140 transitions, 715 flow [2024-11-17 03:39:03,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 140 transitions, 713 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-17 03:39:03,035 INFO L231 Difference]: Finished difference. Result has 100 places, 102 transitions, 427 flow [2024-11-17 03:39:03,035 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=98, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=427, PETRI_PLACES=100, PETRI_TRANSITIONS=102} [2024-11-17 03:39:03,035 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, 8 predicate places. [2024-11-17 03:39:03,036 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 102 transitions, 427 flow [2024-11-17 03:39:03,036 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 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 03:39:03,036 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:39:03,036 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:39:03,036 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-17 03:39:03,036 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-17 03:39:03,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:39:03,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1496974998, now seen corresponding path program 1 times [2024-11-17 03:39:03,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:39:03,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176866980] [2024-11-17 03:39:03,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:39:03,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:39:03,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:39:03,158 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 03:39:03,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:39:03,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176866980] [2024-11-17 03:39:03,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176866980] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:39:03,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:39:03,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-17 03:39:03,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687263286] [2024-11-17 03:39:03,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:39:03,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-17 03:39:03,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:39:03,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-17 03:39:03,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-17 03:39:03,180 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 98 [2024-11-17 03:39:03,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 102 transitions, 427 flow. Second operand has 6 states, 6 states have (on average 32.166666666666664) internal successors, (193), 6 states have internal predecessors, (193), 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 03:39:03,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:39:03,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 98 [2024-11-17 03:39:03,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand