./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/queue_longer.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/queue_longer.i -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 9f874a9872f93f025fac23ebed37f94a1f3b80bd0133ea4d7e298577c4fec427 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 19:24:34,936 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 19:24:35,000 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-11 19:24:35,006 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 19:24:35,006 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 19:24:35,039 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 19:24:35,040 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 19:24:35,040 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 19:24:35,041 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 19:24:35,041 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 19:24:35,042 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 19:24:35,042 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 19:24:35,043 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 19:24:35,044 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 19:24:35,044 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 19:24:35,045 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 19:24:35,045 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 19:24:35,046 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 19:24:35,046 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 19:24:35,046 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 19:24:35,047 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-11 19:24:35,047 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-11 19:24:35,048 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-11 19:24:35,058 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 19:24:35,059 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-11 19:24:35,059 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 19:24:35,059 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-11 19:24:35,059 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 19:24:35,060 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 19:24:35,060 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 19:24:35,060 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 19:24:35,060 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 19:24:35,060 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 19:24:35,061 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:24:35,061 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 19:24:35,061 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 19:24:35,061 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 19:24:35,062 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 19:24:35,062 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 19:24:35,062 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 19:24:35,064 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 19:24:35,065 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 19:24:35,065 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9f874a9872f93f025fac23ebed37f94a1f3b80bd0133ea4d7e298577c4fec427 [2024-10-11 19:24:35,327 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 19:24:35,355 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 19:24:35,358 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 19:24:35,359 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 19:24:35,360 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 19:24:35,361 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/queue_longer.i [2024-10-11 19:24:36,822 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 19:24:37,122 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 19:24:37,125 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/queue_longer.i [2024-10-11 19:24:37,144 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/385c37d20/01246a1494ab437b8472929411a649ca/FLAGe1ee6b2db [2024-10-11 19:24:37,158 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/385c37d20/01246a1494ab437b8472929411a649ca [2024-10-11 19:24:37,160 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 19:24:37,162 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 19:24:37,163 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 19:24:37,163 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 19:24:37,169 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 19:24:37,169 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:24:37" (1/1) ... [2024-10-11 19:24:37,172 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b02eda7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:24:37, skipping insertion in model container [2024-10-11 19:24:37,172 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:24:37" (1/1) ... [2024-10-11 19:24:37,221 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 19:24:37,652 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:24:37,664 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 19:24:37,718 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:24:37,769 INFO L204 MainTranslator]: Completed translation [2024-10-11 19:24:37,770 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:24:37 WrapperNode [2024-10-11 19:24:37,770 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 19:24:37,771 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 19:24:37,771 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 19:24:37,771 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 19:24:37,777 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:24:37" (1/1) ... [2024-10-11 19:24:37,795 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:24:37" (1/1) ... [2024-10-11 19:24:37,834 INFO L138 Inliner]: procedures = 274, calls = 56, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 245 [2024-10-11 19:24:37,835 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 19:24:37,835 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 19:24:37,836 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 19:24:37,836 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 19:24:37,844 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:24:37" (1/1) ... [2024-10-11 19:24:37,844 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:24:37" (1/1) ... [2024-10-11 19:24:37,849 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:24:37" (1/1) ... [2024-10-11 19:24:37,866 INFO L175 MemorySlicer]: Split 43 memory accesses to 4 slices as follows [2, 32, 5, 4]. 74 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 0, 5, 0]. The 18 writes are split as follows [0, 15, 0, 3]. [2024-10-11 19:24:37,867 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:24:37" (1/1) ... [2024-10-11 19:24:37,867 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:24:37" (1/1) ... [2024-10-11 19:24:37,878 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:24:37" (1/1) ... [2024-10-11 19:24:37,882 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:24:37" (1/1) ... [2024-10-11 19:24:37,884 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:24:37" (1/1) ... [2024-10-11 19:24:37,886 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:24:37" (1/1) ... [2024-10-11 19:24:37,889 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 19:24:37,890 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 19:24:37,890 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 19:24:37,890 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 19:24:37,891 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:24:37" (1/1) ... [2024-10-11 19:24:37,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:24:37,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:24:37,926 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 19:24:37,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 19:24:37,967 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-10-11 19:24:37,967 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-10-11 19:24:37,967 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-10-11 19:24:37,967 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-10-11 19:24:37,967 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-11 19:24:37,968 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 19:24:37,968 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 19:24:37,968 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-11 19:24:37,968 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-11 19:24:37,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 19:24:37,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 19:24:37,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-11 19:24:37,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-11 19:24:37,969 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-11 19:24:37,969 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 19:24:37,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 19:24:37,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 19:24:37,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-11 19:24:37,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-11 19:24:37,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 19:24:37,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 19:24:37,971 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 19:24:38,109 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 19:24:38,110 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 19:24:38,669 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 19:24:38,669 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 19:24:38,859 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 19:24:38,860 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-11 19:24:38,861 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:24:38 BoogieIcfgContainer [2024-10-11 19:24:38,861 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 19:24:38,863 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 19:24:38,863 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 19:24:38,867 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 19:24:38,867 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 07:24:37" (1/3) ... [2024-10-11 19:24:38,868 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b62bdf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:24:38, skipping insertion in model container [2024-10-11 19:24:38,868 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:24:37" (2/3) ... [2024-10-11 19:24:38,868 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b62bdf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:24:38, skipping insertion in model container [2024-10-11 19:24:38,869 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:24:38" (3/3) ... [2024-10-11 19:24:38,870 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_longer.i [2024-10-11 19:24:38,888 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 19:24:38,888 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 72 error locations. [2024-10-11 19:24:38,888 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 19:24:39,008 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-11 19:24:39,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 172 transitions, 358 flow [2024-10-11 19:24:39,109 INFO L124 PetriNetUnfolderBase]: 14/170 cut-off events. [2024-10-11 19:24:39,109 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 19:24:39,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 170 events. 14/170 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 524 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 142. Up to 2 conditions per place. [2024-10-11 19:24:39,116 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 172 transitions, 358 flow [2024-10-11 19:24:39,145 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 169 transitions, 350 flow [2024-10-11 19:24:39,154 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 19:24:39,160 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;@beec98, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 19:24:39,160 INFO L334 AbstractCegarLoop]: Starting to check reachability of 134 error locations. [2024-10-11 19:24:39,163 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 19:24:39,163 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2024-10-11 19:24:39,163 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:24:39,163 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:24:39,164 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-10-11 19:24:39,164 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-10-11 19:24:39,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:24:39,170 INFO L85 PathProgramCache]: Analyzing trace with hash 21994, now seen corresponding path program 1 times [2024-10-11 19:24:39,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:24:39,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663174332] [2024-10-11 19:24:39,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:24:39,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:24:39,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:24:39,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:24:39,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:24:39,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663174332] [2024-10-11 19:24:39,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663174332] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:24:39,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:24:39,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-11 19:24:39,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719761890] [2024-10-11 19:24:39,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:24:39,508 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:24:39,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:24:39,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:24:39,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:24:39,656 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 172 [2024-10-11 19:24:39,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 169 transitions, 350 flow. Second operand has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 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) [2024-10-11 19:24:39,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:24:39,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 172 [2024-10-11 19:24:39,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:24:40,364 INFO L124 PetriNetUnfolderBase]: 1744/4653 cut-off events. [2024-10-11 19:24:40,365 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2024-10-11 19:24:40,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7479 conditions, 4653 events. 1744/4653 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 37036 event pairs, 1393 based on Foata normal form. 182/3587 useless extension candidates. Maximal degree in co-relation 7362. Up to 2745 conditions per place. [2024-10-11 19:24:40,406 INFO L140 encePairwiseOnDemand]: 162/172 looper letters, 58 selfloop transitions, 2 changer transitions 0/154 dead transitions. [2024-10-11 19:24:40,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 154 transitions, 440 flow [2024-10-11 19:24:40,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:24:40,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:24:40,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 362 transitions. [2024-10-11 19:24:40,425 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7015503875968992 [2024-10-11 19:24:40,428 INFO L175 Difference]: Start difference. First operand has 162 places, 169 transitions, 350 flow. Second operand 3 states and 362 transitions. [2024-10-11 19:24:40,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 154 transitions, 440 flow [2024-10-11 19:24:40,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 154 transitions, 432 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-11 19:24:40,437 INFO L231 Difference]: Finished difference. Result has 151 places, 154 transitions, 316 flow [2024-10-11 19:24:40,440 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=316, PETRI_PLACES=151, PETRI_TRANSITIONS=154} [2024-10-11 19:24:40,444 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -11 predicate places. [2024-10-11 19:24:40,444 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 154 transitions, 316 flow [2024-10-11 19:24:40,445 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 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) [2024-10-11 19:24:40,445 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:24:40,445 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-10-11 19:24:40,446 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 19:24:40,446 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-10-11 19:24:40,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:24:40,447 INFO L85 PathProgramCache]: Analyzing trace with hash 21995, now seen corresponding path program 1 times [2024-10-11 19:24:40,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:24:40,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009373708] [2024-10-11 19:24:40,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:24:40,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:24:40,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:24:40,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:24:40,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:24:40,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009373708] [2024-10-11 19:24:40,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009373708] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:24:40,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:24:40,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-11 19:24:40,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095130644] [2024-10-11 19:24:40,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:24:40,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:24:40,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:24:40,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:24:40,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:24:40,691 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 172 [2024-10-11 19:24:40,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 154 transitions, 316 flow. Second operand has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 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) [2024-10-11 19:24:40,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:24:40,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 172 [2024-10-11 19:24:40,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:24:41,221 INFO L124 PetriNetUnfolderBase]: 1744/4650 cut-off events. [2024-10-11 19:24:41,221 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-10-11 19:24:41,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7430 conditions, 4650 events. 1744/4650 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 37031 event pairs, 1393 based on Foata normal form. 3/3407 useless extension candidates. Maximal degree in co-relation 7419. Up to 2745 conditions per place. [2024-10-11 19:24:41,251 INFO L140 encePairwiseOnDemand]: 167/172 looper letters, 58 selfloop transitions, 2 changer transitions 0/151 dead transitions. [2024-10-11 19:24:41,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 151 transitions, 430 flow [2024-10-11 19:24:41,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:24:41,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:24:41,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 357 transitions. [2024-10-11 19:24:41,257 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6918604651162791 [2024-10-11 19:24:41,257 INFO L175 Difference]: Start difference. First operand has 151 places, 154 transitions, 316 flow. Second operand 3 states and 357 transitions. [2024-10-11 19:24:41,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 151 transitions, 430 flow [2024-10-11 19:24:41,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 151 transitions, 426 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:24:41,261 INFO L231 Difference]: Finished difference. Result has 148 places, 151 transitions, 310 flow [2024-10-11 19:24:41,262 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=310, PETRI_PLACES=148, PETRI_TRANSITIONS=151} [2024-10-11 19:24:41,263 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -14 predicate places. [2024-10-11 19:24:41,263 INFO L471 AbstractCegarLoop]: Abstraction has has 148 places, 151 transitions, 310 flow [2024-10-11 19:24:41,264 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 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) [2024-10-11 19:24:41,264 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:24:41,264 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-11 19:24:41,264 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 19:24:41,265 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-10-11 19:24:41,266 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:24:41,267 INFO L85 PathProgramCache]: Analyzing trace with hash 655891996, now seen corresponding path program 1 times [2024-10-11 19:24:41,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:24:41,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869964488] [2024-10-11 19:24:41,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:24:41,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:24:41,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:24:41,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:24:41,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:24:41,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869964488] [2024-10-11 19:24:41,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869964488] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:24:41,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:24:41,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:24:41,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109806569] [2024-10-11 19:24:41,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:24:41,409 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:24:41,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:24:41,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:24:41,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:24:41,540 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 172 [2024-10-11 19:24:41,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 151 transitions, 310 flow. Second operand has 4 states, 4 states have (on average 99.75) internal successors, (399), 4 states have internal predecessors, (399), 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) [2024-10-11 19:24:41,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:24:41,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 172 [2024-10-11 19:24:41,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:24:42,051 INFO L124 PetriNetUnfolderBase]: 1744/4648 cut-off events. [2024-10-11 19:24:42,051 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-10-11 19:24:42,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7428 conditions, 4648 events. 1744/4648 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 36988 event pairs, 1393 based on Foata normal form. 1/3405 useless extension candidates. Maximal degree in co-relation 7417. Up to 2744 conditions per place. [2024-10-11 19:24:42,083 INFO L140 encePairwiseOnDemand]: 167/172 looper letters, 57 selfloop transitions, 3 changer transitions 0/149 dead transitions. [2024-10-11 19:24:42,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 149 transitions, 426 flow [2024-10-11 19:24:42,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:24:42,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:24:42,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 458 transitions. [2024-10-11 19:24:42,085 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6656976744186046 [2024-10-11 19:24:42,085 INFO L175 Difference]: Start difference. First operand has 148 places, 151 transitions, 310 flow. Second operand 4 states and 458 transitions. [2024-10-11 19:24:42,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 149 transitions, 426 flow [2024-10-11 19:24:42,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 149 transitions, 422 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:24:42,090 INFO L231 Difference]: Finished difference. Result has 147 places, 149 transitions, 308 flow [2024-10-11 19:24:42,092 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=308, PETRI_PLACES=147, PETRI_TRANSITIONS=149} [2024-10-11 19:24:42,093 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -15 predicate places. [2024-10-11 19:24:42,093 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 149 transitions, 308 flow [2024-10-11 19:24:42,094 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 99.75) internal successors, (399), 4 states have internal predecessors, (399), 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) [2024-10-11 19:24:42,094 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:24:42,094 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-11 19:24:42,094 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 19:24:42,094 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-10-11 19:24:42,095 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:24:42,095 INFO L85 PathProgramCache]: Analyzing trace with hash 655891997, now seen corresponding path program 1 times [2024-10-11 19:24:42,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:24:42,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105409846] [2024-10-11 19:24:42,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:24:42,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:24:42,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:24:42,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:24:42,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:24:42,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105409846] [2024-10-11 19:24:42,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105409846] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:24:42,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:24:42,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:24:42,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778505045] [2024-10-11 19:24:42,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:24:42,217 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:24:42,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:24:42,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:24:42,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:24:42,325 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 172 [2024-10-11 19:24:42,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 149 transitions, 308 flow. Second operand has 4 states, 4 states have (on average 99.75) internal successors, (399), 4 states have internal predecessors, (399), 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) [2024-10-11 19:24:42,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:24:42,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 172 [2024-10-11 19:24:42,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:24:42,781 INFO L124 PetriNetUnfolderBase]: 1744/4646 cut-off events. [2024-10-11 19:24:42,781 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-10-11 19:24:42,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7427 conditions, 4646 events. 1744/4646 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 36986 event pairs, 1393 based on Foata normal form. 2/3405 useless extension candidates. Maximal degree in co-relation 7412. Up to 2744 conditions per place. [2024-10-11 19:24:42,805 INFO L140 encePairwiseOnDemand]: 167/172 looper letters, 57 selfloop transitions, 3 changer transitions 0/147 dead transitions. [2024-10-11 19:24:42,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 147 transitions, 424 flow [2024-10-11 19:24:42,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:24:42,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:24:42,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 458 transitions. [2024-10-11 19:24:42,807 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6656976744186046 [2024-10-11 19:24:42,807 INFO L175 Difference]: Start difference. First operand has 147 places, 149 transitions, 308 flow. Second operand 4 states and 458 transitions. [2024-10-11 19:24:42,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 147 transitions, 424 flow [2024-10-11 19:24:42,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 147 transitions, 418 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 19:24:42,811 INFO L231 Difference]: Finished difference. Result has 145 places, 147 transitions, 304 flow [2024-10-11 19:24:42,812 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=304, PETRI_PLACES=145, PETRI_TRANSITIONS=147} [2024-10-11 19:24:42,813 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -17 predicate places. [2024-10-11 19:24:42,814 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 147 transitions, 304 flow [2024-10-11 19:24:42,814 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 99.75) internal successors, (399), 4 states have internal predecessors, (399), 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) [2024-10-11 19:24:42,814 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:24:42,815 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:24:42,815 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 19:24:42,815 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-10-11 19:24:42,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:24:42,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1000967965, now seen corresponding path program 1 times [2024-10-11 19:24:42,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:24:42,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357133620] [2024-10-11 19:24:42,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:24:42,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:24:42,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:24:42,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:24:42,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:24:42,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357133620] [2024-10-11 19:24:42,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357133620] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:24:42,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:24:42,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:24:42,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251238886] [2024-10-11 19:24:42,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:24:42,906 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:24:42,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:24:42,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:24:42,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:24:43,071 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 172 [2024-10-11 19:24:43,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 147 transitions, 304 flow. Second operand has 4 states, 4 states have (on average 87.5) internal successors, (350), 4 states have internal predecessors, (350), 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) [2024-10-11 19:24:43,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:24:43,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 172 [2024-10-11 19:24:43,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:24:43,498 INFO L124 PetriNetUnfolderBase]: 1703/4145 cut-off events. [2024-10-11 19:24:43,499 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-10-11 19:24:43,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6882 conditions, 4145 events. 1703/4145 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 30733 event pairs, 702 based on Foata normal form. 204/3609 useless extension candidates. Maximal degree in co-relation 6867. Up to 1414 conditions per place. [2024-10-11 19:24:43,518 INFO L140 encePairwiseOnDemand]: 151/172 looper letters, 74 selfloop transitions, 5 changer transitions 0/150 dead transitions. [2024-10-11 19:24:43,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 150 transitions, 469 flow [2024-10-11 19:24:43,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:24:43,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:24:43,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 435 transitions. [2024-10-11 19:24:43,520 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6322674418604651 [2024-10-11 19:24:43,520 INFO L175 Difference]: Start difference. First operand has 145 places, 147 transitions, 304 flow. Second operand 4 states and 435 transitions. [2024-10-11 19:24:43,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 150 transitions, 469 flow [2024-10-11 19:24:43,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 150 transitions, 463 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 19:24:43,524 INFO L231 Difference]: Finished difference. Result has 129 places, 131 transitions, 276 flow [2024-10-11 19:24:43,525 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=276, PETRI_PLACES=129, PETRI_TRANSITIONS=131} [2024-10-11 19:24:43,526 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -33 predicate places. [2024-10-11 19:24:43,526 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 131 transitions, 276 flow [2024-10-11 19:24:43,526 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 87.5) internal successors, (350), 4 states have internal predecessors, (350), 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) [2024-10-11 19:24:43,526 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:24:43,527 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:24:43,527 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-11 19:24:43,527 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-10-11 19:24:43,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:24:43,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1000967966, now seen corresponding path program 1 times [2024-10-11 19:24:43,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:24:43,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584292806] [2024-10-11 19:24:43,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:24:43,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:24:43,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:24:43,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:24:43,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:24:43,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584292806] [2024-10-11 19:24:43,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584292806] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:24:43,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:24:43,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:24:43,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662588075] [2024-10-11 19:24:43,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:24:43,653 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:24:43,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:24:43,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:24:43,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:24:43,797 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 172 [2024-10-11 19:24:43,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 131 transitions, 276 flow. Second operand has 4 states, 4 states have (on average 89.5) internal successors, (358), 4 states have internal predecessors, (358), 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) [2024-10-11 19:24:43,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:24:43,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 172 [2024-10-11 19:24:43,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:24:44,304 INFO L124 PetriNetUnfolderBase]: 1703/3676 cut-off events. [2024-10-11 19:24:44,305 INFO L125 PetriNetUnfolderBase]: For 148/148 co-relation queries the response was YES. [2024-10-11 19:24:44,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6547 conditions, 3676 events. 1703/3676 cut-off events. For 148/148 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 24522 event pairs, 702 based on Foata normal form. 204/3341 useless extension candidates. Maximal degree in co-relation 2518. Up to 1414 conditions per place. [2024-10-11 19:24:44,323 INFO L140 encePairwiseOnDemand]: 153/172 looper letters, 74 selfloop transitions, 5 changer transitions 0/136 dead transitions. [2024-10-11 19:24:44,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 136 transitions, 445 flow [2024-10-11 19:24:44,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:24:44,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:24:44,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 441 transitions. [2024-10-11 19:24:44,326 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6409883720930233 [2024-10-11 19:24:44,326 INFO L175 Difference]: Start difference. First operand has 129 places, 131 transitions, 276 flow. Second operand 4 states and 441 transitions. [2024-10-11 19:24:44,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 136 transitions, 445 flow [2024-10-11 19:24:44,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 136 transitions, 435 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 19:24:44,330 INFO L231 Difference]: Finished difference. Result has 115 places, 117 transitions, 248 flow [2024-10-11 19:24:44,330 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=248, PETRI_PLACES=115, PETRI_TRANSITIONS=117} [2024-10-11 19:24:44,331 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -47 predicate places. [2024-10-11 19:24:44,331 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 117 transitions, 248 flow [2024-10-11 19:24:44,331 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 89.5) internal successors, (358), 4 states have internal predecessors, (358), 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) [2024-10-11 19:24:44,332 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:24:44,332 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:24:44,332 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-11 19:24:44,332 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-10-11 19:24:44,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:24:44,333 INFO L85 PathProgramCache]: Analyzing trace with hash 965236617, now seen corresponding path program 1 times [2024-10-11 19:24:44,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:24:44,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308839395] [2024-10-11 19:24:44,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:24:44,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:24:44,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:24:44,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:24:44,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:24:44,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308839395] [2024-10-11 19:24:44,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308839395] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:24:44,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:24:44,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-11 19:24:44,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197590072] [2024-10-11 19:24:44,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:24:44,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 19:24:44,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:24:44,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 19:24:44,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-10-11 19:24:45,329 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 172 [2024-10-11 19:24:45,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 117 transitions, 248 flow. Second operand has 8 states, 8 states have (on average 74.5) internal successors, (596), 8 states have internal predecessors, (596), 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) [2024-10-11 19:24:45,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:24:45,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 172 [2024-10-11 19:24:45,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:24:46,154 INFO L124 PetriNetUnfolderBase]: 2502/5392 cut-off events. [2024-10-11 19:24:46,155 INFO L125 PetriNetUnfolderBase]: For 118/118 co-relation queries the response was YES. [2024-10-11 19:24:46,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9549 conditions, 5392 events. 2502/5392 cut-off events. For 118/118 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 38758 event pairs, 536 based on Foata normal form. 0/4394 useless extension candidates. Maximal degree in co-relation 3717. Up to 3436 conditions per place. [2024-10-11 19:24:46,176 INFO L140 encePairwiseOnDemand]: 162/172 looper letters, 124 selfloop transitions, 12 changer transitions 0/184 dead transitions. [2024-10-11 19:24:46,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 184 transitions, 659 flow [2024-10-11 19:24:46,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 19:24:46,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 19:24:46,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 722 transitions. [2024-10-11 19:24:46,179 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5247093023255814 [2024-10-11 19:24:46,179 INFO L175 Difference]: Start difference. First operand has 115 places, 117 transitions, 248 flow. Second operand 8 states and 722 transitions. [2024-10-11 19:24:46,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 184 transitions, 659 flow [2024-10-11 19:24:46,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 184 transitions, 647 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 19:24:46,185 INFO L231 Difference]: Finished difference. Result has 123 places, 127 transitions, 314 flow [2024-10-11 19:24:46,185 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=314, PETRI_PLACES=123, PETRI_TRANSITIONS=127} [2024-10-11 19:24:46,186 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -39 predicate places. [2024-10-11 19:24:46,186 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 127 transitions, 314 flow [2024-10-11 19:24:46,186 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 74.5) internal successors, (596), 8 states have internal predecessors, (596), 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) [2024-10-11 19:24:46,187 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:24:46,187 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:24:46,187 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-11 19:24:46,187 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-10-11 19:24:46,188 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:24:46,188 INFO L85 PathProgramCache]: Analyzing trace with hash -133765851, now seen corresponding path program 1 times [2024-10-11 19:24:46,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:24:46,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069794048] [2024-10-11 19:24:46,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:24:46,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:24:46,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:24:46,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:24:46,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:24:46,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069794048] [2024-10-11 19:24:46,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069794048] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:24:46,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:24:46,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:24:46,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264283382] [2024-10-11 19:24:46,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:24:46,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:24:46,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:24:46,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:24:46,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:24:46,458 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 172 [2024-10-11 19:24:46,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 127 transitions, 314 flow. Second operand has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 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) [2024-10-11 19:24:46,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:24:46,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 172 [2024-10-11 19:24:46,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:24:46,951 INFO L124 PetriNetUnfolderBase]: 2073/4641 cut-off events. [2024-10-11 19:24:46,951 INFO L125 PetriNetUnfolderBase]: For 208/208 co-relation queries the response was YES. [2024-10-11 19:24:46,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8318 conditions, 4641 events. 2073/4641 cut-off events. For 208/208 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 33386 event pairs, 892 based on Foata normal form. 375/4320 useless extension candidates. Maximal degree in co-relation 8045. Up to 1823 conditions per place. [2024-10-11 19:24:46,971 INFO L140 encePairwiseOnDemand]: 161/172 looper letters, 104 selfloop transitions, 3 changer transitions 0/158 dead transitions. [2024-10-11 19:24:46,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 158 transitions, 611 flow [2024-10-11 19:24:46,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:24:46,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:24:46,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 475 transitions. [2024-10-11 19:24:46,973 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.690406976744186 [2024-10-11 19:24:46,977 INFO L175 Difference]: Start difference. First operand has 123 places, 127 transitions, 314 flow. Second operand 4 states and 475 transitions. [2024-10-11 19:24:46,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 158 transitions, 611 flow [2024-10-11 19:24:46,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 158 transitions, 607 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:24:46,981 INFO L231 Difference]: Finished difference. Result has 116 places, 119 transitions, 300 flow [2024-10-11 19:24:46,982 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=300, PETRI_PLACES=116, PETRI_TRANSITIONS=119} [2024-10-11 19:24:46,982 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -46 predicate places. [2024-10-11 19:24:46,983 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 119 transitions, 300 flow [2024-10-11 19:24:46,984 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 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) [2024-10-11 19:24:46,984 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:24:46,984 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:24:46,985 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-11 19:24:46,985 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-10-11 19:24:46,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:24:46,985 INFO L85 PathProgramCache]: Analyzing trace with hash -133765850, now seen corresponding path program 1 times [2024-10-11 19:24:46,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:24:46,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758603956] [2024-10-11 19:24:46,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:24:46,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:24:47,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:24:47,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:24:47,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:24:47,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758603956] [2024-10-11 19:24:47,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758603956] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:24:47,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:24:47,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:24:47,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734510411] [2024-10-11 19:24:47,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:24:47,059 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:24:47,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:24:47,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:24:47,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:24:47,063 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 172 [2024-10-11 19:24:47,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 119 transitions, 300 flow. Second operand has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 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) [2024-10-11 19:24:47,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:24:47,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 172 [2024-10-11 19:24:47,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:24:47,391 INFO L124 PetriNetUnfolderBase]: 1382/3055 cut-off events. [2024-10-11 19:24:47,392 INFO L125 PetriNetUnfolderBase]: For 182/182 co-relation queries the response was YES. [2024-10-11 19:24:47,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5511 conditions, 3055 events. 1382/3055 cut-off events. For 182/182 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 17510 event pairs, 703 based on Foata normal form. 55/2727 useless extension candidates. Maximal degree in co-relation 5503. Up to 1211 conditions per place. [2024-10-11 19:24:47,449 INFO L140 encePairwiseOnDemand]: 168/172 looper letters, 81 selfloop transitions, 3 changer transitions 0/132 dead transitions. [2024-10-11 19:24:47,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 132 transitions, 468 flow [2024-10-11 19:24:47,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:24:47,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:24:47,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 388 transitions. [2024-10-11 19:24:47,451 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.751937984496124 [2024-10-11 19:24:47,451 INFO L175 Difference]: Start difference. First operand has 116 places, 119 transitions, 300 flow. Second operand 3 states and 388 transitions. [2024-10-11 19:24:47,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 132 transitions, 468 flow [2024-10-11 19:24:47,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 132 transitions, 439 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-10-11 19:24:47,456 INFO L231 Difference]: Finished difference. Result has 107 places, 109 transitions, 235 flow [2024-10-11 19:24:47,456 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=235, PETRI_PLACES=107, PETRI_TRANSITIONS=109} [2024-10-11 19:24:47,457 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -55 predicate places. [2024-10-11 19:24:47,457 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 109 transitions, 235 flow [2024-10-11 19:24:47,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 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) [2024-10-11 19:24:47,458 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:24:47,458 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:24:47,458 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-11 19:24:47,458 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-10-11 19:24:47,459 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:24:47,459 INFO L85 PathProgramCache]: Analyzing trace with hash 180296953, now seen corresponding path program 1 times [2024-10-11 19:24:47,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:24:47,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153684071] [2024-10-11 19:24:47,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:24:47,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:24:47,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:24:47,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:24:47,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:24:47,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153684071] [2024-10-11 19:24:47,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153684071] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:24:47,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:24:47,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-11 19:24:47,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125692733] [2024-10-11 19:24:47,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:24:47,570 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:24:47,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:24:47,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:24:47,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:24:47,654 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 172 [2024-10-11 19:24:47,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 109 transitions, 235 flow. Second operand has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:24:47,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:24:47,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 172 [2024-10-11 19:24:47,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:24:47,923 INFO L124 PetriNetUnfolderBase]: 1392/3119 cut-off events. [2024-10-11 19:24:47,923 INFO L125 PetriNetUnfolderBase]: For 94/94 co-relation queries the response was YES. [2024-10-11 19:24:47,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5502 conditions, 3119 events. 1392/3119 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 18153 event pairs, 1089 based on Foata normal form. 0/2730 useless extension candidates. Maximal degree in co-relation 5497. Up to 2216 conditions per place. [2024-10-11 19:24:47,938 INFO L140 encePairwiseOnDemand]: 170/172 looper letters, 60 selfloop transitions, 1 changer transitions 0/108 dead transitions. [2024-10-11 19:24:47,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 108 transitions, 355 flow [2024-10-11 19:24:47,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:24:47,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:24:47,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 361 transitions. [2024-10-11 19:24:47,940 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6996124031007752 [2024-10-11 19:24:47,940 INFO L175 Difference]: Start difference. First operand has 107 places, 109 transitions, 235 flow. Second operand 3 states and 361 transitions. [2024-10-11 19:24:47,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 108 transitions, 355 flow [2024-10-11 19:24:47,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 108 transitions, 352 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 19:24:47,942 INFO L231 Difference]: Finished difference. Result has 107 places, 108 transitions, 232 flow [2024-10-11 19:24:47,943 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=107, PETRI_TRANSITIONS=108} [2024-10-11 19:24:47,943 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -55 predicate places. [2024-10-11 19:24:47,943 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 108 transitions, 232 flow [2024-10-11 19:24:47,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:24:47,944 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:24:47,944 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:24:47,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-11 19:24:47,945 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-10-11 19:24:47,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:24:47,945 INFO L85 PathProgramCache]: Analyzing trace with hash 180296952, now seen corresponding path program 1 times [2024-10-11 19:24:47,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:24:47,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454832692] [2024-10-11 19:24:47,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:24:47,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:24:47,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:24:48,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:24:48,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:24:48,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454832692] [2024-10-11 19:24:48,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454832692] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:24:48,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:24:48,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-11 19:24:48,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118221019] [2024-10-11 19:24:48,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:24:48,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:24:48,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:24:48,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:24:48,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:24:48,120 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 172 [2024-10-11 19:24:48,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 108 transitions, 232 flow. Second operand has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 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) [2024-10-11 19:24:48,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:24:48,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 172 [2024-10-11 19:24:48,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:24:48,496 INFO L124 PetriNetUnfolderBase]: 1392/3052 cut-off events. [2024-10-11 19:24:48,496 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2024-10-11 19:24:48,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5422 conditions, 3052 events. 1392/3052 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 17363 event pairs, 1089 based on Foata normal form. 77/2795 useless extension candidates. Maximal degree in co-relation 5417. Up to 2216 conditions per place. [2024-10-11 19:24:48,514 INFO L140 encePairwiseOnDemand]: 168/172 looper letters, 60 selfloop transitions, 1 changer transitions 0/105 dead transitions. [2024-10-11 19:24:48,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 105 transitions, 348 flow [2024-10-11 19:24:48,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:24:48,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:24:48,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 357 transitions. [2024-10-11 19:24:48,517 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6918604651162791 [2024-10-11 19:24:48,517 INFO L175 Difference]: Start difference. First operand has 107 places, 108 transitions, 232 flow. Second operand 3 states and 357 transitions. [2024-10-11 19:24:48,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 105 transitions, 348 flow [2024-10-11 19:24:48,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 105 transitions, 347 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 19:24:48,523 INFO L231 Difference]: Finished difference. Result has 105 places, 105 transitions, 227 flow [2024-10-11 19:24:48,523 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=227, PETRI_PLACES=105, PETRI_TRANSITIONS=105} [2024-10-11 19:24:48,524 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -57 predicate places. [2024-10-11 19:24:48,524 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 105 transitions, 227 flow [2024-10-11 19:24:48,524 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 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) [2024-10-11 19:24:48,524 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:24:48,524 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:24:48,525 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-11 19:24:48,525 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-10-11 19:24:48,528 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:24:48,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1294239115, now seen corresponding path program 1 times [2024-10-11 19:24:48,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:24:48,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104227807] [2024-10-11 19:24:48,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:24:48,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:24:48,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:24:48,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:24:48,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:24:48,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104227807] [2024-10-11 19:24:48,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104227807] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:24:48,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:24:48,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:24:48,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678664398] [2024-10-11 19:24:48,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:24:48,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:24:48,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:24:48,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:24:48,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:24:48,835 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 172 [2024-10-11 19:24:48,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 105 transitions, 227 flow. Second operand has 4 states, 4 states have (on average 103.25) internal successors, (413), 4 states have internal predecessors, (413), 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) [2024-10-11 19:24:48,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:24:48,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 172 [2024-10-11 19:24:48,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:24:49,170 INFO L124 PetriNetUnfolderBase]: 1392/3028 cut-off events. [2024-10-11 19:24:49,170 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2024-10-11 19:24:49,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5399 conditions, 3028 events. 1392/3028 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 17073 event pairs, 1074 based on Foata normal form. 12/2730 useless extension candidates. Maximal degree in co-relation 5394. Up to 2187 conditions per place. [2024-10-11 19:24:49,184 INFO L140 encePairwiseOnDemand]: 167/172 looper letters, 66 selfloop transitions, 3 changer transitions 0/111 dead transitions. [2024-10-11 19:24:49,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 111 transitions, 378 flow [2024-10-11 19:24:49,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:24:49,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:24:49,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 466 transitions. [2024-10-11 19:24:49,186 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6773255813953488 [2024-10-11 19:24:49,186 INFO L175 Difference]: Start difference. First operand has 105 places, 105 transitions, 227 flow. Second operand 4 states and 466 transitions. [2024-10-11 19:24:49,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 111 transitions, 378 flow [2024-10-11 19:24:49,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 111 transitions, 377 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 19:24:49,188 INFO L231 Difference]: Finished difference. Result has 105 places, 103 transitions, 228 flow [2024-10-11 19:24:49,189 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=228, PETRI_PLACES=105, PETRI_TRANSITIONS=103} [2024-10-11 19:24:49,191 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -57 predicate places. [2024-10-11 19:24:49,191 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 103 transitions, 228 flow [2024-10-11 19:24:49,191 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.25) internal successors, (413), 4 states have internal predecessors, (413), 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) [2024-10-11 19:24:49,191 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:24:49,192 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:24:49,192 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-11 19:24:49,192 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-10-11 19:24:49,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:24:49,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1294239116, now seen corresponding path program 1 times [2024-10-11 19:24:49,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:24:49,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167101867] [2024-10-11 19:24:49,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:24:49,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:24:49,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:24:49,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:24:49,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:24:49,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167101867] [2024-10-11 19:24:49,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167101867] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:24:49,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:24:49,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:24:49,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784728061] [2024-10-11 19:24:49,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:24:49,355 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:24:49,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:24:49,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:24:49,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:24:49,506 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 172 [2024-10-11 19:24:49,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 103 transitions, 228 flow. Second operand has 4 states, 4 states have (on average 103.25) internal successors, (413), 4 states have internal predecessors, (413), 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) [2024-10-11 19:24:49,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:24:49,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 172 [2024-10-11 19:24:49,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:24:49,798 INFO L124 PetriNetUnfolderBase]: 1392/3004 cut-off events. [2024-10-11 19:24:49,798 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2024-10-11 19:24:49,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5400 conditions, 3004 events. 1392/3004 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 16841 event pairs, 1074 based on Foata normal form. 24/2730 useless extension candidates. Maximal degree in co-relation 5395. Up to 2187 conditions per place. [2024-10-11 19:24:49,813 INFO L140 encePairwiseOnDemand]: 167/172 looper letters, 66 selfloop transitions, 3 changer transitions 0/109 dead transitions. [2024-10-11 19:24:49,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 109 transitions, 379 flow [2024-10-11 19:24:49,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:24:49,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:24:49,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 466 transitions. [2024-10-11 19:24:49,816 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6773255813953488 [2024-10-11 19:24:49,816 INFO L175 Difference]: Start difference. First operand has 105 places, 103 transitions, 228 flow. Second operand 4 states and 466 transitions. [2024-10-11 19:24:49,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 109 transitions, 379 flow [2024-10-11 19:24:49,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 109 transitions, 373 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 19:24:49,819 INFO L231 Difference]: Finished difference. Result has 103 places, 101 transitions, 224 flow [2024-10-11 19:24:49,819 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=224, PETRI_PLACES=103, PETRI_TRANSITIONS=101} [2024-10-11 19:24:49,820 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -59 predicate places. [2024-10-11 19:24:49,820 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 101 transitions, 224 flow [2024-10-11 19:24:49,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.25) internal successors, (413), 4 states have internal predecessors, (413), 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) [2024-10-11 19:24:49,821 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:24:49,821 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:24:49,821 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-11 19:24:49,822 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-10-11 19:24:49,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:24:49,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1466675005, now seen corresponding path program 1 times [2024-10-11 19:24:49,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:24:49,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889000713] [2024-10-11 19:24:49,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:24:49,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:24:49,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:24:49,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:24:49,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:24:49,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889000713] [2024-10-11 19:24:49,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889000713] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:24:49,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:24:49,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:24:49,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853818258] [2024-10-11 19:24:49,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:24:49,872 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:24:49,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:24:49,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:24:49,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:24:49,873 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 172 [2024-10-11 19:24:49,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 101 transitions, 224 flow. Second operand has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:24:49,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:24:49,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 172 [2024-10-11 19:24:49,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:24:50,170 INFO L124 PetriNetUnfolderBase]: 1380/2992 cut-off events. [2024-10-11 19:24:50,170 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2024-10-11 19:24:50,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5376 conditions, 2992 events. 1380/2992 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 16843 event pairs, 1074 based on Foata normal form. 0/2706 useless extension candidates. Maximal degree in co-relation 5371. Up to 2176 conditions per place. [2024-10-11 19:24:50,186 INFO L140 encePairwiseOnDemand]: 169/172 looper letters, 66 selfloop transitions, 2 changer transitions 0/108 dead transitions. [2024-10-11 19:24:50,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 108 transitions, 375 flow [2024-10-11 19:24:50,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:24:50,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:24:50,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 371 transitions. [2024-10-11 19:24:50,188 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7189922480620154 [2024-10-11 19:24:50,188 INFO L175 Difference]: Start difference. First operand has 103 places, 101 transitions, 224 flow. Second operand 3 states and 371 transitions. [2024-10-11 19:24:50,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 108 transitions, 375 flow [2024-10-11 19:24:50,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 108 transitions, 369 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 19:24:50,191 INFO L231 Difference]: Finished difference. Result has 102 places, 100 transitions, 220 flow [2024-10-11 19:24:50,191 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=102, PETRI_TRANSITIONS=100} [2024-10-11 19:24:50,192 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -60 predicate places. [2024-10-11 19:24:50,192 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 100 transitions, 220 flow [2024-10-11 19:24:50,193 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:24:50,193 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:24:50,193 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:24:50,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-11 19:24:50,194 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-10-11 19:24:50,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:24:50,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1499857943, now seen corresponding path program 1 times [2024-10-11 19:24:50,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:24:50,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781614856] [2024-10-11 19:24:50,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:24:50,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:24:50,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:24:50,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:24:50,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:24:50,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781614856] [2024-10-11 19:24:50,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781614856] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:24:50,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:24:50,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-11 19:24:50,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656411145] [2024-10-11 19:24:50,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:24:50,818 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 19:24:50,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:24:50,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 19:24:50,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-10-11 19:24:51,213 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 172 [2024-10-11 19:24:51,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 100 transitions, 220 flow. Second operand has 9 states, 9 states have (on average 94.44444444444444) internal successors, (850), 9 states have internal predecessors, (850), 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) [2024-10-11 19:24:51,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:24:51,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 172 [2024-10-11 19:24:51,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:24:51,669 INFO L124 PetriNetUnfolderBase]: 1640/3354 cut-off events. [2024-10-11 19:24:51,669 INFO L125 PetriNetUnfolderBase]: For 74/74 co-relation queries the response was YES. [2024-10-11 19:24:51,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6226 conditions, 3354 events. 1640/3354 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 18275 event pairs, 406 based on Foata normal form. 0/3120 useless extension candidates. Maximal degree in co-relation 6221. Up to 2360 conditions per place. [2024-10-11 19:24:51,680 INFO L140 encePairwiseOnDemand]: 162/172 looper letters, 90 selfloop transitions, 9 changer transitions 0/130 dead transitions. [2024-10-11 19:24:51,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 130 transitions, 482 flow [2024-10-11 19:24:51,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 19:24:51,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 19:24:51,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 835 transitions. [2024-10-11 19:24:51,683 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6068313953488372 [2024-10-11 19:24:51,683 INFO L175 Difference]: Start difference. First operand has 102 places, 100 transitions, 220 flow. Second operand 8 states and 835 transitions. [2024-10-11 19:24:51,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 130 transitions, 482 flow [2024-10-11 19:24:51,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 130 transitions, 478 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:24:51,686 INFO L231 Difference]: Finished difference. Result has 106 places, 98 transitions, 230 flow [2024-10-11 19:24:51,687 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=230, PETRI_PLACES=106, PETRI_TRANSITIONS=98} [2024-10-11 19:24:51,687 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -56 predicate places. [2024-10-11 19:24:51,687 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 98 transitions, 230 flow [2024-10-11 19:24:51,688 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 94.44444444444444) internal successors, (850), 9 states have internal predecessors, (850), 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) [2024-10-11 19:24:51,688 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:24:51,688 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:24:51,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-11 19:24:51,688 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-10-11 19:24:51,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:24:51,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1863755492, now seen corresponding path program 1 times [2024-10-11 19:24:51,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:24:51,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570360775] [2024-10-11 19:24:51,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:24:51,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:24:51,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:24:52,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:24:52,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:24:52,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570360775] [2024-10-11 19:24:52,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570360775] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:24:52,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:24:52,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-10-11 19:24:52,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157797340] [2024-10-11 19:24:52,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:24:52,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-11 19:24:52,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:24:52,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-11 19:24:52,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-10-11 19:24:53,886 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 172 [2024-10-11 19:24:53,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 98 transitions, 230 flow. Second operand has 14 states, 14 states have (on average 93.71428571428571) internal successors, (1312), 14 states have internal predecessors, (1312), 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) [2024-10-11 19:24:53,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:24:53,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 172 [2024-10-11 19:24:53,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:24:54,596 INFO L124 PetriNetUnfolderBase]: 1634/3281 cut-off events. [2024-10-11 19:24:54,596 INFO L125 PetriNetUnfolderBase]: For 84/84 co-relation queries the response was YES. [2024-10-11 19:24:54,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6176 conditions, 3281 events. 1634/3281 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 17823 event pairs, 434 based on Foata normal form. 0/3085 useless extension candidates. Maximal degree in co-relation 6171. Up to 1938 conditions per place. [2024-10-11 19:24:54,608 INFO L140 encePairwiseOnDemand]: 158/172 looper letters, 126 selfloop transitions, 13 changer transitions 0/167 dead transitions. [2024-10-11 19:24:54,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 167 transitions, 656 flow [2024-10-11 19:24:54,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 19:24:54,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-11 19:24:54,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1243 transitions. [2024-10-11 19:24:54,611 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6022286821705426 [2024-10-11 19:24:54,611 INFO L175 Difference]: Start difference. First operand has 106 places, 98 transitions, 230 flow. Second operand 12 states and 1243 transitions. [2024-10-11 19:24:54,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 167 transitions, 656 flow [2024-10-11 19:24:54,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 167 transitions, 638 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-10-11 19:24:54,615 INFO L231 Difference]: Finished difference. Result has 107 places, 95 transitions, 238 flow [2024-10-11 19:24:54,615 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=238, PETRI_PLACES=107, PETRI_TRANSITIONS=95} [2024-10-11 19:24:54,615 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -55 predicate places. [2024-10-11 19:24:54,615 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 95 transitions, 238 flow [2024-10-11 19:24:54,616 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 93.71428571428571) internal successors, (1312), 14 states have internal predecessors, (1312), 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) [2024-10-11 19:24:54,616 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:24:54,616 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:24:54,617 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-10-11 19:24:54,617 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-10-11 19:24:54,617 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:24:54,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1617576106, now seen corresponding path program 1 times [2024-10-11 19:24:54,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:24:54,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588666538] [2024-10-11 19:24:54,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:24:54,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:24:54,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:24:55,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:24:55,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:24:55,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588666538] [2024-10-11 19:24:55,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588666538] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:24:55,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:24:55,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-10-11 19:24:55,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001112806] [2024-10-11 19:24:55,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:24:55,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-11 19:24:55,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:24:55,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-11 19:24:55,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-10-11 19:24:56,748 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 172 [2024-10-11 19:24:56,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 95 transitions, 238 flow. Second operand has 13 states, 13 states have (on average 74.23076923076923) internal successors, (965), 13 states have internal predecessors, (965), 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) [2024-10-11 19:24:56,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:24:56,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 172 [2024-10-11 19:24:56,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:24:57,494 INFO L124 PetriNetUnfolderBase]: 2303/4534 cut-off events. [2024-10-11 19:24:57,494 INFO L125 PetriNetUnfolderBase]: For 173/173 co-relation queries the response was YES. [2024-10-11 19:24:57,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8728 conditions, 4534 events. 2303/4534 cut-off events. For 173/173 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 26776 event pairs, 196 based on Foata normal form. 56/4343 useless extension candidates. Maximal degree in co-relation 8722. Up to 2057 conditions per place. [2024-10-11 19:24:57,515 INFO L140 encePairwiseOnDemand]: 154/172 looper letters, 156 selfloop transitions, 21 changer transitions 0/205 dead transitions. [2024-10-11 19:24:57,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 205 transitions, 838 flow [2024-10-11 19:24:57,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-11 19:24:57,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-11 19:24:57,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1112 transitions. [2024-10-11 19:24:57,519 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49731663685152055 [2024-10-11 19:24:57,519 INFO L175 Difference]: Start difference. First operand has 107 places, 95 transitions, 238 flow. Second operand 13 states and 1112 transitions. [2024-10-11 19:24:57,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 205 transitions, 838 flow [2024-10-11 19:24:57,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 205 transitions, 816 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-10-11 19:24:57,523 INFO L231 Difference]: Finished difference. Result has 113 places, 104 transitions, 317 flow [2024-10-11 19:24:57,523 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=317, PETRI_PLACES=113, PETRI_TRANSITIONS=104} [2024-10-11 19:24:57,524 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -49 predicate places. [2024-10-11 19:24:57,524 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 104 transitions, 317 flow [2024-10-11 19:24:57,525 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 74.23076923076923) internal successors, (965), 13 states have internal predecessors, (965), 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) [2024-10-11 19:24:57,525 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:24:57,525 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:24:57,525 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-10-11 19:24:57,525 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-10-11 19:24:57,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:24:57,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1792755013, now seen corresponding path program 1 times [2024-10-11 19:24:57,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:24:57,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888184888] [2024-10-11 19:24:57,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:24:57,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:24:57,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:24:57,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:24:57,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:24:57,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888184888] [2024-10-11 19:24:57,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888184888] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:24:57,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:24:57,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:24:57,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74560867] [2024-10-11 19:24:57,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:24:57,602 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:24:57,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:24:57,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:24:57,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:24:57,609 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 172 [2024-10-11 19:24:57,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 104 transitions, 317 flow. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 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) [2024-10-11 19:24:57,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:24:57,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 172 [2024-10-11 19:24:57,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:24:58,354 INFO L124 PetriNetUnfolderBase]: 3297/7270 cut-off events. [2024-10-11 19:24:58,355 INFO L125 PetriNetUnfolderBase]: For 1435/1435 co-relation queries the response was YES. [2024-10-11 19:24:58,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14326 conditions, 7270 events. 3297/7270 cut-off events. For 1435/1435 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 53856 event pairs, 1489 based on Foata normal form. 117/6770 useless extension candidates. Maximal degree in co-relation 14316. Up to 3185 conditions per place. [2024-10-11 19:24:58,389 INFO L140 encePairwiseOnDemand]: 169/172 looper letters, 121 selfloop transitions, 2 changer transitions 0/160 dead transitions. [2024-10-11 19:24:58,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 160 transitions, 759 flow [2024-10-11 19:24:58,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:24:58,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:24:58,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 407 transitions. [2024-10-11 19:24:58,391 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7887596899224806 [2024-10-11 19:24:58,391 INFO L175 Difference]: Start difference. First operand has 113 places, 104 transitions, 317 flow. Second operand 3 states and 407 transitions. [2024-10-11 19:24:58,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 160 transitions, 759 flow [2024-10-11 19:24:58,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 160 transitions, 726 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-10-11 19:24:58,398 INFO L231 Difference]: Finished difference. Result has 109 places, 105 transitions, 309 flow [2024-10-11 19:24:58,399 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=309, PETRI_PLACES=109, PETRI_TRANSITIONS=105} [2024-10-11 19:24:58,399 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -53 predicate places. [2024-10-11 19:24:58,400 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 105 transitions, 309 flow [2024-10-11 19:24:58,400 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 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) [2024-10-11 19:24:58,400 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:24:58,400 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:24:58,400 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-10-11 19:24:58,400 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-10-11 19:24:58,401 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:24:58,401 INFO L85 PathProgramCache]: Analyzing trace with hash -768837185, now seen corresponding path program 1 times [2024-10-11 19:24:58,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:24:58,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960435931] [2024-10-11 19:24:58,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:24:58,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:24:58,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:24:58,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:24:58,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:24:58,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960435931] [2024-10-11 19:24:58,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960435931] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:24:58,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:24:58,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:24:58,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007922005] [2024-10-11 19:24:58,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:24:58,543 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:24:58,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:24:58,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:24:58,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:24:58,662 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 172 [2024-10-11 19:24:58,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 105 transitions, 309 flow. Second operand has 4 states, 4 states have (on average 106.5) internal successors, (426), 4 states have internal predecessors, (426), 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) [2024-10-11 19:24:58,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:24:58,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 172 [2024-10-11 19:24:58,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:24:59,344 INFO L124 PetriNetUnfolderBase]: 4169/8303 cut-off events. [2024-10-11 19:24:59,344 INFO L125 PetriNetUnfolderBase]: For 2085/2085 co-relation queries the response was YES. [2024-10-11 19:24:59,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17895 conditions, 8303 events. 4169/8303 cut-off events. For 2085/2085 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 58295 event pairs, 2275 based on Foata normal form. 54/7826 useless extension candidates. Maximal degree in co-relation 17883. Up to 5581 conditions per place. [2024-10-11 19:24:59,376 INFO L140 encePairwiseOnDemand]: 167/172 looper letters, 101 selfloop transitions, 3 changer transitions 0/140 dead transitions. [2024-10-11 19:24:59,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 140 transitions, 628 flow [2024-10-11 19:24:59,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:24:59,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:24:59,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 488 transitions. [2024-10-11 19:24:59,377 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7093023255813954 [2024-10-11 19:24:59,378 INFO L175 Difference]: Start difference. First operand has 109 places, 105 transitions, 309 flow. Second operand 4 states and 488 transitions. [2024-10-11 19:24:59,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 140 transitions, 628 flow [2024-10-11 19:24:59,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 140 transitions, 624 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 19:24:59,386 INFO L231 Difference]: Finished difference. Result has 112 places, 106 transitions, 323 flow [2024-10-11 19:24:59,386 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=323, PETRI_PLACES=112, PETRI_TRANSITIONS=106} [2024-10-11 19:24:59,387 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -50 predicate places. [2024-10-11 19:24:59,387 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 106 transitions, 323 flow [2024-10-11 19:24:59,387 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 106.5) internal successors, (426), 4 states have internal predecessors, (426), 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) [2024-10-11 19:24:59,387 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:24:59,388 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:24:59,388 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-10-11 19:24:59,388 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-10-11 19:24:59,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:24:59,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1906914504, now seen corresponding path program 1 times [2024-10-11 19:24:59,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:24:59,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006709557] [2024-10-11 19:24:59,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:24:59,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:24:59,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:24:59,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:24:59,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:24:59,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006709557] [2024-10-11 19:24:59,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006709557] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:24:59,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:24:59,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:24:59,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621048445] [2024-10-11 19:24:59,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:24:59,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:24:59,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:24:59,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:24:59,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:24:59,446 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 172 [2024-10-11 19:24:59,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 106 transitions, 323 flow. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 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) [2024-10-11 19:24:59,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:24:59,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 172 [2024-10-11 19:24:59,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:24:59,808 INFO L124 PetriNetUnfolderBase]: 2462/5217 cut-off events. [2024-10-11 19:24:59,808 INFO L125 PetriNetUnfolderBase]: For 1237/1237 co-relation queries the response was YES. [2024-10-11 19:24:59,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11091 conditions, 5217 events. 2462/5217 cut-off events. For 1237/1237 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 33737 event pairs, 1201 based on Foata normal form. 124/5063 useless extension candidates. Maximal degree in co-relation 11078. Up to 2282 conditions per place. [2024-10-11 19:24:59,823 INFO L140 encePairwiseOnDemand]: 168/172 looper letters, 79 selfloop transitions, 3 changer transitions 0/118 dead transitions. [2024-10-11 19:24:59,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 118 transitions, 511 flow [2024-10-11 19:24:59,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:24:59,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:24:59,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 374 transitions. [2024-10-11 19:24:59,824 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7248062015503876 [2024-10-11 19:24:59,824 INFO L175 Difference]: Start difference. First operand has 112 places, 106 transitions, 323 flow. Second operand 3 states and 374 transitions. [2024-10-11 19:24:59,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 118 transitions, 511 flow [2024-10-11 19:24:59,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 118 transitions, 493 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-10-11 19:24:59,829 INFO L231 Difference]: Finished difference. Result has 109 places, 102 transitions, 298 flow [2024-10-11 19:24:59,829 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=298, PETRI_PLACES=109, PETRI_TRANSITIONS=102} [2024-10-11 19:24:59,830 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -53 predicate places. [2024-10-11 19:24:59,830 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 102 transitions, 298 flow [2024-10-11 19:24:59,830 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 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) [2024-10-11 19:24:59,830 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:24:59,830 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:24:59,830 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-10-11 19:24:59,830 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-10-11 19:24:59,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:24:59,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1996137524, now seen corresponding path program 1 times [2024-10-11 19:24:59,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:24:59,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652480463] [2024-10-11 19:24:59,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:24:59,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:24:59,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:24:59,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:24:59,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:24:59,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652480463] [2024-10-11 19:24:59,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652480463] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:24:59,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:24:59,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:24:59,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371101392] [2024-10-11 19:24:59,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:24:59,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:24:59,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:24:59,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:24:59,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:24:59,931 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 172 [2024-10-11 19:24:59,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 102 transitions, 298 flow. Second operand has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 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) [2024-10-11 19:24:59,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:24:59,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 172 [2024-10-11 19:24:59,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:25:00,257 INFO L124 PetriNetUnfolderBase]: 1502/3584 cut-off events. [2024-10-11 19:25:00,257 INFO L125 PetriNetUnfolderBase]: For 1083/1083 co-relation queries the response was YES. [2024-10-11 19:25:00,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7759 conditions, 3584 events. 1502/3584 cut-off events. For 1083/1083 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 21460 event pairs, 368 based on Foata normal form. 216/3634 useless extension candidates. Maximal degree in co-relation 7747. Up to 1831 conditions per place. [2024-10-11 19:25:00,275 INFO L140 encePairwiseOnDemand]: 166/172 looper letters, 71 selfloop transitions, 6 changer transitions 0/115 dead transitions. [2024-10-11 19:25:00,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 115 transitions, 496 flow [2024-10-11 19:25:00,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:25:00,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:25:00,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 374 transitions. [2024-10-11 19:25:00,277 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7248062015503876 [2024-10-11 19:25:00,277 INFO L175 Difference]: Start difference. First operand has 109 places, 102 transitions, 298 flow. Second operand 3 states and 374 transitions. [2024-10-11 19:25:00,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 115 transitions, 496 flow [2024-10-11 19:25:00,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 115 transitions, 490 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:25:00,282 INFO L231 Difference]: Finished difference. Result has 109 places, 102 transitions, 304 flow [2024-10-11 19:25:00,282 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=304, PETRI_PLACES=109, PETRI_TRANSITIONS=102} [2024-10-11 19:25:00,282 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -53 predicate places. [2024-10-11 19:25:00,282 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 102 transitions, 304 flow [2024-10-11 19:25:00,283 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 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) [2024-10-11 19:25:00,283 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:25:00,283 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:25:00,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-10-11 19:25:00,283 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-10-11 19:25:00,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:25:00,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1729400946, now seen corresponding path program 1 times [2024-10-11 19:25:00,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:25:00,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22268842] [2024-10-11 19:25:00,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:25:00,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:25:00,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:25:00,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:25:00,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:25:00,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22268842] [2024-10-11 19:25:00,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22268842] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:25:00,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:25:00,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:25:00,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930748467] [2024-10-11 19:25:00,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:25:00,488 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:25:00,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:25:00,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:25:00,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:25:00,643 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 172 [2024-10-11 19:25:00,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 102 transitions, 304 flow. Second operand has 4 states, 4 states have (on average 103.25) internal successors, (413), 4 states have internal predecessors, (413), 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) [2024-10-11 19:25:00,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:25:00,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 172 [2024-10-11 19:25:00,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:25:01,045 INFO L124 PetriNetUnfolderBase]: 1502/3335 cut-off events. [2024-10-11 19:25:01,045 INFO L125 PetriNetUnfolderBase]: For 1236/1236 co-relation queries the response was YES. [2024-10-11 19:25:01,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7807 conditions, 3335 events. 1502/3335 cut-off events. For 1236/1236 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 18708 event pairs, 1013 based on Foata normal form. 126/3373 useless extension candidates. Maximal degree in co-relation 7795. Up to 2189 conditions per place. [2024-10-11 19:25:01,056 INFO L140 encePairwiseOnDemand]: 162/172 looper letters, 66 selfloop transitions, 3 changer transitions 0/100 dead transitions. [2024-10-11 19:25:01,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 100 transitions, 445 flow [2024-10-11 19:25:01,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:25:01,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:25:01,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 444 transitions. [2024-10-11 19:25:01,058 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6453488372093024 [2024-10-11 19:25:01,058 INFO L175 Difference]: Start difference. First operand has 109 places, 102 transitions, 304 flow. Second operand 4 states and 444 transitions. [2024-10-11 19:25:01,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 100 transitions, 445 flow [2024-10-11 19:25:01,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 100 transitions, 439 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 19:25:01,063 INFO L231 Difference]: Finished difference. Result has 104 places, 95 transitions, 290 flow [2024-10-11 19:25:01,063 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=290, PETRI_PLACES=104, PETRI_TRANSITIONS=95} [2024-10-11 19:25:01,063 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -58 predicate places. [2024-10-11 19:25:01,064 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 95 transitions, 290 flow [2024-10-11 19:25:01,064 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.25) internal successors, (413), 4 states have internal predecessors, (413), 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) [2024-10-11 19:25:01,064 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:25:01,064 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:25:01,064 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-10-11 19:25:01,065 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-10-11 19:25:01,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:25:01,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1828955163, now seen corresponding path program 1 times [2024-10-11 19:25:01,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:25:01,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719551651] [2024-10-11 19:25:01,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:25:01,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:25:01,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:25:01,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 19:25:01,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:25:01,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719551651] [2024-10-11 19:25:01,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719551651] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:25:01,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625586110] [2024-10-11 19:25:01,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:25:01,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:25:01,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:25:01,135 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:25:01,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 19:25:01,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:25:01,290 INFO L255 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-11 19:25:01,296 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:25:01,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 19:25:01,373 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:25:01,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625586110] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:25:01,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 19:25:01,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2024-10-11 19:25:01,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975231835] [2024-10-11 19:25:01,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:25:01,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:25:01,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:25:01,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:25:01,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 19:25:01,454 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 172 [2024-10-11 19:25:01,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 95 transitions, 290 flow. Second operand has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 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) [2024-10-11 19:25:01,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:25:01,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 172 [2024-10-11 19:25:01,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:25:01,711 INFO L124 PetriNetUnfolderBase]: 1502/3338 cut-off events. [2024-10-11 19:25:01,711 INFO L125 PetriNetUnfolderBase]: For 1161/1161 co-relation queries the response was YES. [2024-10-11 19:25:01,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7694 conditions, 3338 events. 1502/3338 cut-off events. For 1161/1161 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 18770 event pairs, 1193 based on Foata normal form. 5/3241 useless extension candidates. Maximal degree in co-relation 7681. Up to 2607 conditions per place. [2024-10-11 19:25:01,724 INFO L140 encePairwiseOnDemand]: 170/172 looper letters, 62 selfloop transitions, 1 changer transitions 2/94 dead transitions. [2024-10-11 19:25:01,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 94 transitions, 416 flow [2024-10-11 19:25:01,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:25:01,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:25:01,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 358 transitions. [2024-10-11 19:25:01,726 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6937984496124031 [2024-10-11 19:25:01,726 INFO L175 Difference]: Start difference. First operand has 104 places, 95 transitions, 290 flow. Second operand 3 states and 358 transitions. [2024-10-11 19:25:01,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 94 transitions, 416 flow [2024-10-11 19:25:01,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 94 transitions, 410 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 19:25:01,730 INFO L231 Difference]: Finished difference. Result has 102 places, 92 transitions, 279 flow [2024-10-11 19:25:01,730 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=279, PETRI_PLACES=102, PETRI_TRANSITIONS=92} [2024-10-11 19:25:01,730 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -60 predicate places. [2024-10-11 19:25:01,730 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 92 transitions, 279 flow [2024-10-11 19:25:01,731 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 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) [2024-10-11 19:25:01,731 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:25:01,731 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:25:01,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 19:25:01,933 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-10-11 19:25:01,934 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-10-11 19:25:01,934 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:25:01,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1234515603, now seen corresponding path program 1 times [2024-10-11 19:25:01,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:25:01,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725731979] [2024-10-11 19:25:01,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:25:01,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:25:01,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:25:02,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:25:02,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:25:02,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725731979] [2024-10-11 19:25:02,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725731979] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:25:02,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:25:02,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-10-11 19:25:02,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419465875] [2024-10-11 19:25:02,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:25:02,998 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-11 19:25:02,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:25:02,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-11 19:25:02,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-10-11 19:25:03,817 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 172 [2024-10-11 19:25:03,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 92 transitions, 279 flow. Second operand has 14 states, 14 states have (on average 95.0) internal successors, (1330), 14 states have internal predecessors, (1330), 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) [2024-10-11 19:25:03,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:25:03,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 172 [2024-10-11 19:25:03,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:25:04,345 INFO L124 PetriNetUnfolderBase]: 1358/2896 cut-off events. [2024-10-11 19:25:04,345 INFO L125 PetriNetUnfolderBase]: For 947/947 co-relation queries the response was YES. [2024-10-11 19:25:04,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6732 conditions, 2896 events. 1358/2896 cut-off events. For 947/947 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 14380 event pairs, 281 based on Foata normal form. 0/2826 useless extension candidates. Maximal degree in co-relation 6719. Up to 1267 conditions per place. [2024-10-11 19:25:04,354 INFO L140 encePairwiseOnDemand]: 152/172 looper letters, 123 selfloop transitions, 19 changer transitions 14/176 dead transitions. [2024-10-11 19:25:04,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 176 transitions, 857 flow [2024-10-11 19:25:04,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-11 19:25:04,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-11 19:25:04,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1432 transitions. [2024-10-11 19:25:04,356 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5946843853820598 [2024-10-11 19:25:04,356 INFO L175 Difference]: Start difference. First operand has 102 places, 92 transitions, 279 flow. Second operand 14 states and 1432 transitions. [2024-10-11 19:25:04,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 176 transitions, 857 flow [2024-10-11 19:25:04,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 176 transitions, 850 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-10-11 19:25:04,361 INFO L231 Difference]: Finished difference. Result has 114 places, 93 transitions, 323 flow [2024-10-11 19:25:04,361 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=323, PETRI_PLACES=114, PETRI_TRANSITIONS=93} [2024-10-11 19:25:04,362 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -48 predicate places. [2024-10-11 19:25:04,362 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 93 transitions, 323 flow [2024-10-11 19:25:04,363 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 95.0) internal successors, (1330), 14 states have internal predecessors, (1330), 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) [2024-10-11 19:25:04,363 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:25:04,363 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:25:04,363 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-10-11 19:25:04,363 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-10-11 19:25:04,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:25:04,364 INFO L85 PathProgramCache]: Analyzing trace with hash 695686713, now seen corresponding path program 1 times [2024-10-11 19:25:04,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:25:04,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530573682] [2024-10-11 19:25:04,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:25:04,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:25:04,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:25:06,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:25:06,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:25:06,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530573682] [2024-10-11 19:25:06,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530573682] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:25:06,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:25:06,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2024-10-11 19:25:06,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011872241] [2024-10-11 19:25:06,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:25:06,397 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-11 19:25:06,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:25:06,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-11 19:25:06,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2024-10-11 19:25:07,792 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 172 [2024-10-11 19:25:07,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 93 transitions, 323 flow. Second operand has 18 states, 18 states have (on average 63.44444444444444) internal successors, (1142), 18 states have internal predecessors, (1142), 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) [2024-10-11 19:25:07,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:25:07,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 172 [2024-10-11 19:25:07,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:25:08,550 INFO L124 PetriNetUnfolderBase]: 1500/3171 cut-off events. [2024-10-11 19:25:08,550 INFO L125 PetriNetUnfolderBase]: For 1162/1162 co-relation queries the response was YES. [2024-10-11 19:25:08,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7618 conditions, 3171 events. 1500/3171 cut-off events. For 1162/1162 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 15370 event pairs, 216 based on Foata normal form. 0/3089 useless extension candidates. Maximal degree in co-relation 7603. Up to 939 conditions per place. [2024-10-11 19:25:08,560 INFO L140 encePairwiseOnDemand]: 151/172 looper letters, 149 selfloop transitions, 20 changer transitions 15/203 dead transitions. [2024-10-11 19:25:08,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 203 transitions, 1043 flow [2024-10-11 19:25:08,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-11 19:25:08,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-10-11 19:25:08,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1144 transitions. [2024-10-11 19:25:08,563 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-10-11 19:25:08,563 INFO L175 Difference]: Start difference. First operand has 114 places, 93 transitions, 323 flow. Second operand 16 states and 1144 transitions. [2024-10-11 19:25:08,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 203 transitions, 1043 flow [2024-10-11 19:25:08,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 203 transitions, 1017 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-10-11 19:25:08,569 INFO L231 Difference]: Finished difference. Result has 123 places, 99 transitions, 378 flow [2024-10-11 19:25:08,569 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=378, PETRI_PLACES=123, PETRI_TRANSITIONS=99} [2024-10-11 19:25:08,570 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -39 predicate places. [2024-10-11 19:25:08,570 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 99 transitions, 378 flow [2024-10-11 19:25:08,571 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 63.44444444444444) internal successors, (1142), 18 states have internal predecessors, (1142), 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) [2024-10-11 19:25:08,571 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:25:08,571 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:25:08,571 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-10-11 19:25:08,571 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting t2Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-10-11 19:25:08,572 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:25:08,572 INFO L85 PathProgramCache]: Analyzing trace with hash 63816408, now seen corresponding path program 1 times [2024-10-11 19:25:08,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:25:08,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739452917] [2024-10-11 19:25:08,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:25:08,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:25:08,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:25:08,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:25:08,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:25:08,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739452917] [2024-10-11 19:25:08,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739452917] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:25:08,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:25:08,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:25:08,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439975603] [2024-10-11 19:25:08,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:25:08,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:25:08,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:25:08,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:25:08,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:25:08,902 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 172 [2024-10-11 19:25:08,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 99 transitions, 378 flow. Second operand has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 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) [2024-10-11 19:25:08,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:25:08,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 172 [2024-10-11 19:25:08,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:25:09,181 INFO L124 PetriNetUnfolderBase]: 1385/3076 cut-off events. [2024-10-11 19:25:09,182 INFO L125 PetriNetUnfolderBase]: For 1366/1372 co-relation queries the response was YES. [2024-10-11 19:25:09,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7467 conditions, 3076 events. 1385/3076 cut-off events. For 1366/1372 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 15803 event pairs, 682 based on Foata normal form. 12/3021 useless extension candidates. Maximal degree in co-relation 7448. Up to 1705 conditions per place. [2024-10-11 19:25:09,196 INFO L140 encePairwiseOnDemand]: 168/172 looper letters, 116 selfloop transitions, 3 changer transitions 0/151 dead transitions. [2024-10-11 19:25:09,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 151 transitions, 828 flow [2024-10-11 19:25:09,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:25:09,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:25:09,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 500 transitions. [2024-10-11 19:25:09,197 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7267441860465116 [2024-10-11 19:25:09,197 INFO L175 Difference]: Start difference. First operand has 123 places, 99 transitions, 378 flow. Second operand 4 states and 500 transitions. [2024-10-11 19:25:09,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 151 transitions, 828 flow [2024-10-11 19:25:09,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 151 transitions, 782 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-10-11 19:25:09,203 INFO L231 Difference]: Finished difference. Result has 116 places, 99 transitions, 359 flow [2024-10-11 19:25:09,203 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=359, PETRI_PLACES=116, PETRI_TRANSITIONS=99} [2024-10-11 19:25:09,204 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -46 predicate places. [2024-10-11 19:25:09,204 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 99 transitions, 359 flow [2024-10-11 19:25:09,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 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) [2024-10-11 19:25:09,204 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:25:09,205 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:25:09,205 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-10-11 19:25:09,205 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-10-11 19:25:09,205 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:25:09,205 INFO L85 PathProgramCache]: Analyzing trace with hash -234743062, now seen corresponding path program 1 times [2024-10-11 19:25:09,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:25:09,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782871672] [2024-10-11 19:25:09,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:25:09,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:25:09,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:25:11,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:25:11,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:25:11,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782871672] [2024-10-11 19:25:11,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782871672] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:25:11,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:25:11,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2024-10-11 19:25:11,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021402050] [2024-10-11 19:25:11,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:25:11,288 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-11 19:25:11,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:25:11,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-11 19:25:11,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2024-10-11 19:25:12,682 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 172 [2024-10-11 19:25:12,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 99 transitions, 359 flow. Second operand has 20 states, 20 states have (on average 92.6) internal successors, (1852), 20 states have internal predecessors, (1852), 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) [2024-10-11 19:25:12,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:25:12,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 172 [2024-10-11 19:25:12,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:25:13,419 INFO L124 PetriNetUnfolderBase]: 1484/3121 cut-off events. [2024-10-11 19:25:13,419 INFO L125 PetriNetUnfolderBase]: For 1912/1912 co-relation queries the response was YES. [2024-10-11 19:25:13,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8015 conditions, 3121 events. 1484/3121 cut-off events. For 1912/1912 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 14942 event pairs, 211 based on Foata normal form. 0/3078 useless extension candidates. Maximal degree in co-relation 7995. Up to 906 conditions per place. [2024-10-11 19:25:13,428 INFO L140 encePairwiseOnDemand]: 149/172 looper letters, 152 selfloop transitions, 22 changer transitions 16/209 dead transitions. [2024-10-11 19:25:13,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 209 transitions, 1157 flow [2024-10-11 19:25:13,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-11 19:25:13,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-11 19:25:13,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1703 transitions. [2024-10-11 19:25:13,430 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.582421340629275 [2024-10-11 19:25:13,430 INFO L175 Difference]: Start difference. First operand has 116 places, 99 transitions, 359 flow. Second operand 17 states and 1703 transitions. [2024-10-11 19:25:13,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 209 transitions, 1157 flow [2024-10-11 19:25:13,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 209 transitions, 1107 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-10-11 19:25:13,438 INFO L231 Difference]: Finished difference. Result has 131 places, 100 transitions, 407 flow [2024-10-11 19:25:13,438 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=407, PETRI_PLACES=131, PETRI_TRANSITIONS=100} [2024-10-11 19:25:13,439 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, -31 predicate places. [2024-10-11 19:25:13,439 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 100 transitions, 407 flow [2024-10-11 19:25:13,439 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 92.6) internal successors, (1852), 20 states have internal predecessors, (1852), 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) [2024-10-11 19:25:13,440 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:25:13,440 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:25:13,440 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-10-11 19:25:13,440 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-10-11 19:25:13,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:25:13,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1935397497, now seen corresponding path program 1 times [2024-10-11 19:25:13,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:25:13,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354632152] [2024-10-11 19:25:13,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:25:13,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:25:13,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:25:16,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:25:16,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:25:16,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354632152] [2024-10-11 19:25:16,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354632152] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:25:16,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:25:16,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2024-10-11 19:25:16,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129774347] [2024-10-11 19:25:16,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:25:16,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-11 19:25:16,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:25:16,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-11 19:25:16,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2024-10-11 19:25:20,009 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 172 [2024-10-11 19:25:20,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 100 transitions, 407 flow. Second operand has 27 states, 27 states have (on average 92.92592592592592) internal successors, (2509), 27 states have internal predecessors, (2509), 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) [2024-10-11 19:25:20,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:25:20,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 172 [2024-10-11 19:25:20,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:25:21,408 INFO L124 PetriNetUnfolderBase]: 1764/3763 cut-off events. [2024-10-11 19:25:21,408 INFO L125 PetriNetUnfolderBase]: For 2142/2144 co-relation queries the response was YES. [2024-10-11 19:25:21,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9845 conditions, 3763 events. 1764/3763 cut-off events. For 2142/2144 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 19865 event pairs, 397 based on Foata normal form. 0/3714 useless extension candidates. Maximal degree in co-relation 9823. Up to 2440 conditions per place. [2024-10-11 19:25:21,419 INFO L140 encePairwiseOnDemand]: 144/172 looper letters, 156 selfloop transitions, 50 changer transitions 20/247 dead transitions. [2024-10-11 19:25:21,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 247 transitions, 1425 flow [2024-10-11 19:25:21,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-11 19:25:21,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-10-11 19:25:21,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2758 transitions. [2024-10-11 19:25:21,423 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5726744186046512 [2024-10-11 19:25:21,423 INFO L175 Difference]: Start difference. First operand has 131 places, 100 transitions, 407 flow. Second operand 28 states and 2758 transitions. [2024-10-11 19:25:21,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 247 transitions, 1425 flow [2024-10-11 19:25:21,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 247 transitions, 1341 flow, removed 2 selfloop flow, removed 14 redundant places. [2024-10-11 19:25:21,432 INFO L231 Difference]: Finished difference. Result has 166 places, 146 transitions, 828 flow [2024-10-11 19:25:21,433 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=828, PETRI_PLACES=166, PETRI_TRANSITIONS=146} [2024-10-11 19:25:21,433 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, 4 predicate places. [2024-10-11 19:25:21,433 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 146 transitions, 828 flow [2024-10-11 19:25:21,435 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 92.92592592592592) internal successors, (2509), 27 states have internal predecessors, (2509), 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) [2024-10-11 19:25:21,435 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:25:21,435 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:25:21,435 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-10-11 19:25:21,435 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-10-11 19:25:21,435 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:25:21,436 INFO L85 PathProgramCache]: Analyzing trace with hash 379737055, now seen corresponding path program 2 times [2024-10-11 19:25:21,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:25:21,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355976407] [2024-10-11 19:25:21,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:25:21,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:25:21,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:25:24,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:25:24,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:25:24,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355976407] [2024-10-11 19:25:24,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355976407] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:25:24,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:25:24,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2024-10-11 19:25:24,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279531080] [2024-10-11 19:25:24,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:25:24,722 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-11 19:25:24,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:25:24,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-11 19:25:24,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2024-10-11 19:25:29,187 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 172 [2024-10-11 19:25:29,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 146 transitions, 828 flow. Second operand has 27 states, 27 states have (on average 92.92592592592592) internal successors, (2509), 27 states have internal predecessors, (2509), 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) [2024-10-11 19:25:29,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:25:29,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 172 [2024-10-11 19:25:29,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:25:31,186 INFO L124 PetriNetUnfolderBase]: 1989/4265 cut-off events. [2024-10-11 19:25:31,186 INFO L125 PetriNetUnfolderBase]: For 8791/8791 co-relation queries the response was YES. [2024-10-11 19:25:31,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13537 conditions, 4265 events. 1989/4265 cut-off events. For 8791/8791 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 23621 event pairs, 427 based on Foata normal form. 0/4204 useless extension candidates. Maximal degree in co-relation 13493. Up to 2747 conditions per place. [2024-10-11 19:25:31,205 INFO L140 encePairwiseOnDemand]: 146/172 looper letters, 194 selfloop transitions, 46 changer transitions 22/283 dead transitions. [2024-10-11 19:25:31,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 283 transitions, 2072 flow [2024-10-11 19:25:31,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-11 19:25:31,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-10-11 19:25:31,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2748 transitions. [2024-10-11 19:25:31,208 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5705980066445183 [2024-10-11 19:25:31,208 INFO L175 Difference]: Start difference. First operand has 166 places, 146 transitions, 828 flow. Second operand 28 states and 2748 transitions. [2024-10-11 19:25:31,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 283 transitions, 2072 flow [2024-10-11 19:25:31,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 283 transitions, 2048 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-10-11 19:25:31,235 INFO L231 Difference]: Finished difference. Result has 207 places, 179 transitions, 1276 flow [2024-10-11 19:25:31,235 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=820, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1276, PETRI_PLACES=207, PETRI_TRANSITIONS=179} [2024-10-11 19:25:31,236 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, 45 predicate places. [2024-10-11 19:25:31,236 INFO L471 AbstractCegarLoop]: Abstraction has has 207 places, 179 transitions, 1276 flow [2024-10-11 19:25:31,237 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 92.92592592592592) internal successors, (2509), 27 states have internal predecessors, (2509), 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) [2024-10-11 19:25:31,237 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:25:31,237 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:25:31,237 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-10-11 19:25:31,238 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-10-11 19:25:31,238 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:25:31,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1544009109, now seen corresponding path program 3 times [2024-10-11 19:25:31,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:25:31,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132142346] [2024-10-11 19:25:31,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:25:31,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:25:31,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:25:34,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:25:34,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:25:34,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132142346] [2024-10-11 19:25:34,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132142346] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:25:34,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:25:34,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2024-10-11 19:25:34,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615019801] [2024-10-11 19:25:34,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:25:34,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-11 19:25:34,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:25:34,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-11 19:25:34,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2024-10-11 19:25:39,491 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 172 [2024-10-11 19:25:39,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 179 transitions, 1276 flow. Second operand has 27 states, 27 states have (on average 92.92592592592592) internal successors, (2509), 27 states have internal predecessors, (2509), 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) [2024-10-11 19:25:39,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:25:39,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 172 [2024-10-11 19:25:39,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:25:41,712 INFO L124 PetriNetUnfolderBase]: 2228/4786 cut-off events. [2024-10-11 19:25:41,712 INFO L125 PetriNetUnfolderBase]: For 17135/17135 co-relation queries the response was YES. [2024-10-11 19:25:41,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16714 conditions, 4786 events. 2228/4786 cut-off events. For 17135/17135 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 27642 event pairs, 477 based on Foata normal form. 0/4723 useless extension candidates. Maximal degree in co-relation 16653. Up to 3179 conditions per place. [2024-10-11 19:25:41,732 INFO L140 encePairwiseOnDemand]: 146/172 looper letters, 227 selfloop transitions, 48 changer transitions 23/319 dead transitions. [2024-10-11 19:25:41,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 319 transitions, 2720 flow [2024-10-11 19:25:41,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-10-11 19:25:41,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-10-11 19:25:41,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2753 transitions. [2024-10-11 19:25:41,735 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5716362126245847 [2024-10-11 19:25:41,735 INFO L175 Difference]: Start difference. First operand has 207 places, 179 transitions, 1276 flow. Second operand 28 states and 2753 transitions. [2024-10-11 19:25:41,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 319 transitions, 2720 flow [2024-10-11 19:25:41,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 319 transitions, 2611 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-10-11 19:25:41,778 INFO L231 Difference]: Finished difference. Result has 246 places, 212 transitions, 1727 flow [2024-10-11 19:25:41,778 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=1167, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1727, PETRI_PLACES=246, PETRI_TRANSITIONS=212} [2024-10-11 19:25:41,778 INFO L277 CegarLoopForPetriNet]: 162 programPoint places, 84 predicate places. [2024-10-11 19:25:41,778 INFO L471 AbstractCegarLoop]: Abstraction has has 246 places, 212 transitions, 1727 flow [2024-10-11 19:25:41,779 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 92.92592592592592) internal successors, (2509), 27 states have internal predecessors, (2509), 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) [2024-10-11 19:25:41,779 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:25:41,780 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:25:41,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-10-11 19:25:41,780 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting t2Err18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 131 more)] === [2024-10-11 19:25:41,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:25:41,780 INFO L85 PathProgramCache]: Analyzing trace with hash 67341393, now seen corresponding path program 4 times [2024-10-11 19:25:41,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:25:41,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975032828] [2024-10-11 19:25:41,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:25:41,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:25:41,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:25:44,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:25:44,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:25:44,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975032828] [2024-10-11 19:25:44,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975032828] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:25:44,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:25:44,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2024-10-11 19:25:44,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806570616] [2024-10-11 19:25:44,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:25:44,763 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-10-11 19:25:44,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:25:44,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-10-11 19:25:44,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702