./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/safe016_rmo.opt.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/safe016_rmo.opt.i -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 e946e8dea30db7efb52f6f71a24f03cd895152f9df0eae9d8d1291d135f806ee --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 19:03:39,393 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 19:03:39,479 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-24 19:03:39,487 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 19:03:39,488 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 19:03:39,519 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 19:03:39,519 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 19:03:39,520 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 19:03:39,521 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 19:03:39,526 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 19:03:39,526 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 19:03:39,527 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 19:03:39,527 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 19:03:39,527 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 19:03:39,528 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 19:03:39,528 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 19:03:39,528 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 19:03:39,528 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 19:03:39,529 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 19:03:39,529 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 19:03:39,529 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-24 19:03:39,530 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-24 19:03:39,532 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-24 19:03:39,532 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 19:03:39,532 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-24 19:03:39,532 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 19:03:39,532 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 19:03:39,533 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 19:03:39,533 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 19:03:39,533 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 19:03:39,533 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 19:03:39,533 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 19:03:39,534 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 19:03:39,534 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:03:39,534 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 19:03:39,534 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 19:03:39,534 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 19:03:39,535 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 19:03:39,535 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 19:03:39,537 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 19:03:39,538 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 19:03:39,538 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 19:03:39,539 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e946e8dea30db7efb52f6f71a24f03cd895152f9df0eae9d8d1291d135f806ee [2024-10-24 19:03:39,808 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 19:03:39,835 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 19:03:39,839 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 19:03:39,840 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 19:03:39,840 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 19:03:39,842 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/safe016_rmo.opt.i [2024-10-24 19:03:41,299 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 19:03:41,570 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 19:03:41,571 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/safe016_rmo.opt.i [2024-10-24 19:03:41,586 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7538f74e6/fca43f7d9e6b4b04bb0572bdf593e0c9/FLAG714707b13 [2024-10-24 19:03:41,884 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7538f74e6/fca43f7d9e6b4b04bb0572bdf593e0c9 [2024-10-24 19:03:41,887 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 19:03:41,888 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 19:03:41,889 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 19:03:41,889 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 19:03:41,898 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 19:03:41,899 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:03:41" (1/1) ... [2024-10-24 19:03:41,902 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22a00b33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:03:41, skipping insertion in model container [2024-10-24 19:03:41,902 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:03:41" (1/1) ... [2024-10-24 19:03:41,960 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 19:03:42,402 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:03:42,415 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 19:03:42,489 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:03:42,527 INFO L204 MainTranslator]: Completed translation [2024-10-24 19:03:42,528 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:03:42 WrapperNode [2024-10-24 19:03:42,528 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 19:03:42,529 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 19:03:42,529 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 19:03:42,529 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 19:03:42,537 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:03:42" (1/1) ... [2024-10-24 19:03:42,560 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:03:42" (1/1) ... [2024-10-24 19:03:42,588 INFO L138 Inliner]: procedures = 176, calls = 74, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 172 [2024-10-24 19:03:42,589 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 19:03:42,590 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 19:03:42,590 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 19:03:42,590 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 19:03:42,602 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:03:42" (1/1) ... [2024-10-24 19:03:42,602 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:03:42" (1/1) ... [2024-10-24 19:03:42,610 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:03:42" (1/1) ... [2024-10-24 19:03:42,651 INFO L175 MemorySlicer]: Split 28 memory accesses to 2 slices as follows [2, 26]. 93 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 11 writes are split as follows [0, 11]. [2024-10-24 19:03:42,651 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:03:42" (1/1) ... [2024-10-24 19:03:42,652 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:03:42" (1/1) ... [2024-10-24 19:03:42,667 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:03:42" (1/1) ... [2024-10-24 19:03:42,671 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:03:42" (1/1) ... [2024-10-24 19:03:42,677 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:03:42" (1/1) ... [2024-10-24 19:03:42,680 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:03:42" (1/1) ... [2024-10-24 19:03:42,690 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 19:03:42,691 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 19:03:42,692 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 19:03:42,692 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 19:03:42,693 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:03:42" (1/1) ... [2024-10-24 19:03:42,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:03:42,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:03:42,729 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-24 19:03:42,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-24 19:03:42,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-24 19:03:42,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-24 19:03:42,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-24 19:03:42,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-24 19:03:42,786 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-24 19:03:42,786 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 19:03:42,786 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-10-24 19:03:42,786 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-10-24 19:03:42,786 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-10-24 19:03:42,787 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-10-24 19:03:42,787 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-10-24 19:03:42,788 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-10-24 19:03:42,788 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-10-24 19:03:42,789 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-10-24 19:03:42,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 19:03:42,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-24 19:03:42,789 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-24 19:03:42,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 19:03:42,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 19:03:42,792 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-24 19:03:42,965 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 19:03:42,967 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 19:03:43,589 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-24 19:03:43,589 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 19:03:44,316 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 19:03:44,317 INFO L314 CfgBuilder]: Removed 0 assume(true) statements. [2024-10-24 19:03:44,317 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 07:03:44 BoogieIcfgContainer [2024-10-24 19:03:44,318 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 19:03:44,319 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 19:03:44,320 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 19:03:44,323 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 19:03:44,324 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 07:03:41" (1/3) ... [2024-10-24 19:03:44,325 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@525cb66a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 07:03:44, skipping insertion in model container [2024-10-24 19:03:44,325 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:03:42" (2/3) ... [2024-10-24 19:03:44,326 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@525cb66a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 07:03:44, skipping insertion in model container [2024-10-24 19:03:44,326 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 07:03:44" (3/3) ... [2024-10-24 19:03:44,327 INFO L112 eAbstractionObserver]: Analyzing ICFG safe016_rmo.opt.i [2024-10-24 19:03:44,345 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 19:03:44,346 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 52 error locations. [2024-10-24 19:03:44,346 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-24 19:03:44,493 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-24 19:03:44,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 100 transitions, 216 flow [2024-10-24 19:03:44,590 INFO L124 PetriNetUnfolderBase]: 2/96 cut-off events. [2024-10-24 19:03:44,591 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 19:03:44,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 96 events. 2/96 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 389 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 100. Up to 2 conditions per place. [2024-10-24 19:03:44,601 INFO L82 GeneralOperation]: Start removeDead. Operand has 111 places, 100 transitions, 216 flow [2024-10-24 19:03:44,606 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 96 transitions, 204 flow [2024-10-24 19:03:44,621 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 19:03:44,633 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;@676a2dac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 19:03:44,633 INFO L334 AbstractCegarLoop]: Starting to check reachability of 88 error locations. [2024-10-24 19:03:44,640 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 19:03:44,640 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2024-10-24 19:03:44,640 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 19:03:44,640 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:03:44,641 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-24 19:03:44,642 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 85 more)] === [2024-10-24 19:03:44,646 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:03:44,647 INFO L85 PathProgramCache]: Analyzing trace with hash 882979422, now seen corresponding path program 1 times [2024-10-24 19:03:44,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:03:44,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322728869] [2024-10-24 19:03:44,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:03:44,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:03:44,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:03:44,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:03:44,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:03:44,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322728869] [2024-10-24 19:03:44,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322728869] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:03:44,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:03:44,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-24 19:03:44,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255919981] [2024-10-24 19:03:44,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:03:44,997 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:03:45,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:03:45,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:03:45,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:03:45,037 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 100 [2024-10-24 19:03:45,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 96 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:03:45,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:03:45,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 100 [2024-10-24 19:03:45,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:04:01,394 INFO L124 PetriNetUnfolderBase]: 81178/115764 cut-off events. [2024-10-24 19:04:01,394 INFO L125 PetriNetUnfolderBase]: For 240/240 co-relation queries the response was YES. [2024-10-24 19:04:01,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222557 conditions, 115764 events. 81178/115764 cut-off events. For 240/240 co-relation queries the response was YES. Maximal size of possible extension queue 7127. Compared 957699 event pairs, 81178 based on Foata normal form. 3430/68313 useless extension candidates. Maximal degree in co-relation 222545. Up to 105987 conditions per place. [2024-10-24 19:04:02,653 INFO L140 encePairwiseOnDemand]: 63/100 looper letters, 42 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2024-10-24 19:04:02,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 59 transitions, 216 flow [2024-10-24 19:04:02,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:04:02,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:04:02,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 139 transitions. [2024-10-24 19:04:02,664 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4633333333333333 [2024-10-24 19:04:02,666 INFO L175 Difference]: Start difference. First operand has 107 places, 96 transitions, 204 flow. Second operand 3 states and 139 transitions. [2024-10-24 19:04:02,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 59 transitions, 216 flow [2024-10-24 19:04:02,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 59 transitions, 212 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-24 19:04:02,701 INFO L231 Difference]: Finished difference. Result has 70 places, 59 transitions, 128 flow [2024-10-24 19:04:02,703 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=70, PETRI_TRANSITIONS=59} [2024-10-24 19:04:02,706 INFO L277 CegarLoopForPetriNet]: 107 programPoint places, -37 predicate places. [2024-10-24 19:04:02,707 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 59 transitions, 128 flow [2024-10-24 19:04:02,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:04:02,707 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:04:02,707 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-24 19:04:02,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 19:04:02,708 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 85 more)] === [2024-10-24 19:04:02,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:04:02,709 INFO L85 PathProgramCache]: Analyzing trace with hash 882979423, now seen corresponding path program 1 times [2024-10-24 19:04:02,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:04:02,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966252709] [2024-10-24 19:04:02,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:04:02,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:04:02,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:04:02,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:04:02,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:04:02,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966252709] [2024-10-24 19:04:02,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966252709] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:04:02,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:04:02,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-24 19:04:02,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157637029] [2024-10-24 19:04:02,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:04:02,867 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:04:02,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:04:02,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:04:02,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:04:02,869 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 100 [2024-10-24 19:04:02,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 59 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:04:02,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:04:02,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 100 [2024-10-24 19:04:02,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:04:04,904 INFO L124 PetriNetUnfolderBase]: 6311/9814 cut-off events. [2024-10-24 19:04:04,904 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 19:04:04,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18580 conditions, 9814 events. 6311/9814 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 67742 event pairs, 6311 based on Foata normal form. 0/9246 useless extension candidates. Maximal degree in co-relation 18574. Up to 8592 conditions per place. [2024-10-24 19:04:04,977 INFO L140 encePairwiseOnDemand]: 85/100 looper letters, 27 selfloop transitions, 1 changer transitions 1/45 dead transitions. [2024-10-24 19:04:04,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 45 transitions, 158 flow [2024-10-24 19:04:04,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:04:04,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:04:04,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2024-10-24 19:04:04,980 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3433333333333333 [2024-10-24 19:04:04,980 INFO L175 Difference]: Start difference. First operand has 70 places, 59 transitions, 128 flow. Second operand 3 states and 103 transitions. [2024-10-24 19:04:04,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 45 transitions, 158 flow [2024-10-24 19:04:04,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 45 transitions, 157 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 19:04:04,981 INFO L231 Difference]: Finished difference. Result has 57 places, 44 transitions, 99 flow [2024-10-24 19:04:04,982 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=57, PETRI_TRANSITIONS=44} [2024-10-24 19:04:04,984 INFO L277 CegarLoopForPetriNet]: 107 programPoint places, -50 predicate places. [2024-10-24 19:04:04,985 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 44 transitions, 99 flow [2024-10-24 19:04:04,985 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:04:04,985 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:04:04,986 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:04:04,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-24 19:04:04,987 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 85 more)] === [2024-10-24 19:04:04,988 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:04:04,988 INFO L85 PathProgramCache]: Analyzing trace with hash 919965507, now seen corresponding path program 1 times [2024-10-24 19:04:04,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:04:04,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968888214] [2024-10-24 19:04:04,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:04:04,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:04:05,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:04:05,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:04:05,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:04:05,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968888214] [2024-10-24 19:04:05,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968888214] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:04:05,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:04:05,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-24 19:04:05,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701772796] [2024-10-24 19:04:05,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:04:05,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:04:05,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:04:05,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:04:05,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:04:05,272 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 100 [2024-10-24 19:04:05,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:04:05,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:04:05,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 100 [2024-10-24 19:04:05,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:04:06,504 INFO L124 PetriNetUnfolderBase]: 5447/8464 cut-off events. [2024-10-24 19:04:06,504 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 19:04:06,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16079 conditions, 8464 events. 5447/8464 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 55783 event pairs, 1783 based on Foata normal form. 0/8125 useless extension candidates. Maximal degree in co-relation 16072. Up to 6097 conditions per place. [2024-10-24 19:04:06,560 INFO L140 encePairwiseOnDemand]: 96/100 looper letters, 43 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2024-10-24 19:04:06,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 61 transitions, 225 flow [2024-10-24 19:04:06,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:04:06,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:04:06,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2024-10-24 19:04:06,562 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3566666666666667 [2024-10-24 19:04:06,563 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 99 flow. Second operand 3 states and 107 transitions. [2024-10-24 19:04:06,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 61 transitions, 225 flow [2024-10-24 19:04:06,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 61 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 19:04:06,565 INFO L231 Difference]: Finished difference. Result has 58 places, 44 transitions, 108 flow [2024-10-24 19:04:06,566 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=58, PETRI_TRANSITIONS=44} [2024-10-24 19:04:06,566 INFO L277 CegarLoopForPetriNet]: 107 programPoint places, -49 predicate places. [2024-10-24 19:04:06,567 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 44 transitions, 108 flow [2024-10-24 19:04:06,567 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:04:06,567 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:04:06,567 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:04:06,568 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-24 19:04:06,568 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 85 more)] === [2024-10-24 19:04:06,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:04:06,568 INFO L85 PathProgramCache]: Analyzing trace with hash -676299082, now seen corresponding path program 1 times [2024-10-24 19:04:06,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:04:06,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541468408] [2024-10-24 19:04:06,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:04:06,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:04:06,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:04:06,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:04:06,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:04:06,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541468408] [2024-10-24 19:04:06,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541468408] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:04:06,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:04:06,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 19:04:06,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528033132] [2024-10-24 19:04:06,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:04:06,730 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:04:06,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:04:06,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:04:06,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:04:06,738 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 100 [2024-10-24 19:04:06,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 44 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:04:06,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:04:06,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 100 [2024-10-24 19:04:06,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:04:07,958 INFO L124 PetriNetUnfolderBase]: 5039/7912 cut-off events. [2024-10-24 19:04:07,958 INFO L125 PetriNetUnfolderBase]: For 544/544 co-relation queries the response was YES. [2024-10-24 19:04:07,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15953 conditions, 7912 events. 5039/7912 cut-off events. For 544/544 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 52246 event pairs, 1591 based on Foata normal form. 0/7861 useless extension candidates. Maximal degree in co-relation 15944. Up to 5544 conditions per place. [2024-10-24 19:04:08,013 INFO L140 encePairwiseOnDemand]: 97/100 looper letters, 42 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2024-10-24 19:04:08,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 60 transitions, 228 flow [2024-10-24 19:04:08,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:04:08,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:04:08,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 125 transitions. [2024-10-24 19:04:08,015 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3125 [2024-10-24 19:04:08,015 INFO L175 Difference]: Start difference. First operand has 58 places, 44 transitions, 108 flow. Second operand 4 states and 125 transitions. [2024-10-24 19:04:08,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 60 transitions, 228 flow [2024-10-24 19:04:08,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 60 transitions, 224 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:04:08,019 INFO L231 Difference]: Finished difference. Result has 58 places, 43 transitions, 104 flow [2024-10-24 19:04:08,020 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=58, PETRI_TRANSITIONS=43} [2024-10-24 19:04:08,020 INFO L277 CegarLoopForPetriNet]: 107 programPoint places, -49 predicate places. [2024-10-24 19:04:08,021 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 43 transitions, 104 flow [2024-10-24 19:04:08,021 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:04:08,021 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:04:08,021 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:04:08,021 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-24 19:04:08,022 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 85 more)] === [2024-10-24 19:04:08,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:04:08,022 INFO L85 PathProgramCache]: Analyzing trace with hash -676299081, now seen corresponding path program 1 times [2024-10-24 19:04:08,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:04:08,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467452537] [2024-10-24 19:04:08,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:04:08,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:04:08,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:04:08,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:04:08,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:04:08,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467452537] [2024-10-24 19:04:08,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467452537] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:04:08,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:04:08,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:04:08,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298691226] [2024-10-24 19:04:08,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:04:08,356 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:04:08,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:04:08,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:04:08,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:04:08,357 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 100 [2024-10-24 19:04:08,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 43 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:04:08,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:04:08,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 100 [2024-10-24 19:04:08,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:04:09,576 INFO L124 PetriNetUnfolderBase]: 4631/7488 cut-off events. [2024-10-24 19:04:09,576 INFO L125 PetriNetUnfolderBase]: For 512/512 co-relation queries the response was YES. [2024-10-24 19:04:09,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14833 conditions, 7488 events. 4631/7488 cut-off events. For 512/512 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 51977 event pairs, 887 based on Foata normal form. 144/7581 useless extension candidates. Maximal degree in co-relation 14824. Up to 4992 conditions per place. [2024-10-24 19:04:09,630 INFO L140 encePairwiseOnDemand]: 97/100 looper letters, 41 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2024-10-24 19:04:09,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 59 transitions, 222 flow [2024-10-24 19:04:09,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:04:09,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:04:09,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 124 transitions. [2024-10-24 19:04:09,633 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.31 [2024-10-24 19:04:09,633 INFO L175 Difference]: Start difference. First operand has 58 places, 43 transitions, 104 flow. Second operand 4 states and 124 transitions. [2024-10-24 19:04:09,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 59 transitions, 222 flow [2024-10-24 19:04:09,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 59 transitions, 217 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-24 19:04:09,636 INFO L231 Difference]: Finished difference. Result has 57 places, 42 transitions, 99 flow [2024-10-24 19:04:09,636 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=99, PETRI_PLACES=57, PETRI_TRANSITIONS=42} [2024-10-24 19:04:09,637 INFO L277 CegarLoopForPetriNet]: 107 programPoint places, -50 predicate places. [2024-10-24 19:04:09,637 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 42 transitions, 99 flow [2024-10-24 19:04:09,637 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:04:09,637 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:04:09,637 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:04:09,637 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-24 19:04:09,637 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 85 more)] === [2024-10-24 19:04:09,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:04:09,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1456215445, now seen corresponding path program 1 times [2024-10-24 19:04:09,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:04:09,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976002427] [2024-10-24 19:04:09,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:04:09,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:04:09,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:04:09,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:04:09,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:04:09,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976002427] [2024-10-24 19:04:09,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976002427] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:04:09,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:04:09,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-24 19:04:09,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112202055] [2024-10-24 19:04:09,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:04:09,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:04:09,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:04:09,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:04:09,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:04:09,740 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 100 [2024-10-24 19:04:09,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 42 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:04:09,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:04:09,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 100 [2024-10-24 19:04:09,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:04:10,884 INFO L124 PetriNetUnfolderBase]: 4631/7366 cut-off events. [2024-10-24 19:04:10,885 INFO L125 PetriNetUnfolderBase]: For 416/416 co-relation queries the response was YES. [2024-10-24 19:04:10,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14710 conditions, 7366 events. 4631/7366 cut-off events. For 416/416 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 50247 event pairs, 4631 based on Foata normal form. 192/7374 useless extension candidates. Maximal degree in co-relation 14702. Up to 6336 conditions per place. [2024-10-24 19:04:10,927 INFO L140 encePairwiseOnDemand]: 98/100 looper letters, 24 selfloop transitions, 1 changer transitions 1/41 dead transitions. [2024-10-24 19:04:10,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 41 transitions, 149 flow [2024-10-24 19:04:10,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:04:10,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:04:10,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2024-10-24 19:04:10,929 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.28 [2024-10-24 19:04:10,929 INFO L175 Difference]: Start difference. First operand has 57 places, 42 transitions, 99 flow. Second operand 3 states and 84 transitions. [2024-10-24 19:04:10,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 41 transitions, 149 flow [2024-10-24 19:04:10,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 41 transitions, 146 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:04:10,931 INFO L231 Difference]: Finished difference. Result has 56 places, 40 transitions, 94 flow [2024-10-24 19:04:10,931 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=56, PETRI_TRANSITIONS=40} [2024-10-24 19:04:10,932 INFO L277 CegarLoopForPetriNet]: 107 programPoint places, -51 predicate places. [2024-10-24 19:04:10,932 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 40 transitions, 94 flow [2024-10-24 19:04:10,932 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:04:10,932 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:04:10,932 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:04:10,933 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-24 19:04:10,933 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [P0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, P0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 85 more)] === [2024-10-24 19:04:10,933 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:04:10,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1456214123, now seen corresponding path program 1 times [2024-10-24 19:04:10,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:04:10,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932787058] [2024-10-24 19:04:10,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:04:10,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:04:10,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:04:11,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:04:11,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:04:11,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932787058] [2024-10-24 19:04:11,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932787058] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:04:11,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:04:11,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 19:04:11,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568743572] [2024-10-24 19:04:11,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:04:11,154 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:04:11,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:04:11,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:04:11,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:04:11,160 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 100 [2024-10-24 19:04:11,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 40 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:04:11,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:04:11,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 100 [2024-10-24 19:04:11,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand