./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_13-arraycollapse_nr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_13-arraycollapse_nr.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b018c23c1a90f89310fc4f08bf16b02660af5a398ccd47f63d319e7a234c112b --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 19:08:28,169 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 19:08:28,236 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-24 19:08:28,242 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 19:08:28,244 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 19:08:28,279 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 19:08:28,280 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 19:08:28,281 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 19:08:28,281 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 19:08:28,282 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 19:08:28,283 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 19:08:28,283 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 19:08:28,284 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 19:08:28,284 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 19:08:28,285 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 19:08:28,286 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 19:08:28,286 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 19:08:28,286 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 19:08:28,287 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 19:08:28,287 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 19:08:28,288 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-24 19:08:28,288 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-24 19:08:28,288 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-24 19:08:28,289 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 19:08:28,289 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-24 19:08:28,289 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 19:08:28,290 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 19:08:28,290 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 19:08:28,290 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 19:08:28,291 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 19:08:28,291 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 19:08:28,291 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 19:08:28,292 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 19:08:28,292 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:08:28,292 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 19:08:28,293 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 19:08:28,293 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 19:08:28,294 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 19:08:28,294 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 19:08:28,294 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 19:08:28,295 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 19:08:28,295 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 19:08:28,295 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b018c23c1a90f89310fc4f08bf16b02660af5a398ccd47f63d319e7a234c112b [2024-10-24 19:08:28,555 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 19:08:28,579 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 19:08:28,582 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 19:08:28,583 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 19:08:28,584 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 19:08:28,585 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_13-arraycollapse_nr.i [2024-10-24 19:08:30,011 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 19:08:30,255 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 19:08:30,255 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_13-arraycollapse_nr.i [2024-10-24 19:08:30,278 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6c519d42/6f81418c566f4decba611cfc9dc88112/FLAGd653773de [2024-10-24 19:08:30,291 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6c519d42/6f81418c566f4decba611cfc9dc88112 [2024-10-24 19:08:30,294 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 19:08:30,295 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 19:08:30,297 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 19:08:30,299 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 19:08:30,306 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 19:08:30,306 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:08:30" (1/1) ... [2024-10-24 19:08:30,307 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9fecdee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:08:30, skipping insertion in model container [2024-10-24 19:08:30,307 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:08:30" (1/1) ... [2024-10-24 19:08:30,356 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 19:08:30,880 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:08:30,897 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 19:08:30,945 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:08:31,037 INFO L204 MainTranslator]: Completed translation [2024-10-24 19:08:31,038 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:08:31 WrapperNode [2024-10-24 19:08:31,038 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 19:08:31,039 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 19:08:31,039 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 19:08:31,040 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 19:08:31,047 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:08:31" (1/1) ... [2024-10-24 19:08:31,081 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:08:31" (1/1) ... [2024-10-24 19:08:31,115 INFO L138 Inliner]: procedures = 370, calls = 35, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 171 [2024-10-24 19:08:31,116 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 19:08:31,116 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 19:08:31,117 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 19:08:31,117 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 19:08:31,127 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:08:31" (1/1) ... [2024-10-24 19:08:31,127 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:08:31" (1/1) ... [2024-10-24 19:08:31,132 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:08:31" (1/1) ... [2024-10-24 19:08:31,158 INFO L175 MemorySlicer]: Split 32 memory accesses to 3 slices as follows [1, 7, 24]. 75 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0, 0]. The 21 writes are split as follows [1, 2, 18]. [2024-10-24 19:08:31,158 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:08:31" (1/1) ... [2024-10-24 19:08:31,161 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:08:31" (1/1) ... [2024-10-24 19:08:31,172 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:08:31" (1/1) ... [2024-10-24 19:08:31,177 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:08:31" (1/1) ... [2024-10-24 19:08:31,180 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:08:31" (1/1) ... [2024-10-24 19:08:31,182 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:08:31" (1/1) ... [2024-10-24 19:08:31,191 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 19:08:31,192 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 19:08:31,192 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 19:08:31,192 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 19:08:31,193 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:08:31" (1/1) ... [2024-10-24 19:08:31,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:08:31,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:08:31,240 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-24 19:08:31,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-24 19:08:31,312 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-10-24 19:08:31,312 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-10-24 19:08:31,312 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-10-24 19:08:31,313 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-24 19:08:31,313 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-24 19:08:31,313 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-24 19:08:31,314 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-24 19:08:31,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-24 19:08:31,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-24 19:08:31,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-24 19:08:31,314 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-24 19:08:31,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-24 19:08:31,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 19:08:31,316 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-10-24 19:08:31,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-10-24 19:08:31,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-10-24 19:08:31,317 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-10-24 19:08:31,348 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-10-24 19:08:31,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 19:08:31,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 19:08:31,350 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-24 19:08:31,514 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 19:08:31,516 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 19:08:32,041 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-24 19:08:32,042 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 19:08:32,285 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 19:08:32,286 INFO L314 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-24 19:08:32,286 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 07:08:32 BoogieIcfgContainer [2024-10-24 19:08:32,287 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 19:08:32,289 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 19:08:32,290 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 19:08:32,293 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 19:08:32,294 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 07:08:30" (1/3) ... [2024-10-24 19:08:32,295 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c7e3ea6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 07:08:32, skipping insertion in model container [2024-10-24 19:08:32,295 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:08:31" (2/3) ... [2024-10-24 19:08:32,295 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c7e3ea6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 07:08:32, skipping insertion in model container [2024-10-24 19:08:32,296 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 07:08:32" (3/3) ... [2024-10-24 19:08:32,297 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_13-arraycollapse_nr.i [2024-10-24 19:08:32,314 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 19:08:32,314 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 61 error locations. [2024-10-24 19:08:32,314 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-24 19:08:32,371 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-24 19:08:32,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 107 transitions, 218 flow [2024-10-24 19:08:32,462 INFO L124 PetriNetUnfolderBase]: 1/106 cut-off events. [2024-10-24 19:08:32,462 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 19:08:32,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110 conditions, 106 events. 1/106 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 328 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 66. Up to 2 conditions per place. [2024-10-24 19:08:32,465 INFO L82 GeneralOperation]: Start removeDead. Operand has 110 places, 107 transitions, 218 flow [2024-10-24 19:08:32,470 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 106 transitions, 215 flow [2024-10-24 19:08:32,484 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 19:08:32,492 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;@339fb8a8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 19:08:32,493 INFO L334 AbstractCegarLoop]: Starting to check reachability of 74 error locations. [2024-10-24 19:08:32,497 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 19:08:32,497 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-24 19:08:32,497 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 19:08:32,497 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:08:32,498 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-24 19:08:32,498 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-10-24 19:08:32,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:08:32,505 INFO L85 PathProgramCache]: Analyzing trace with hash 546601, now seen corresponding path program 1 times [2024-10-24 19:08:32,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:08:32,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855349362] [2024-10-24 19:08:32,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:08:32,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:08:32,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:08:32,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:08:32,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:08:32,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855349362] [2024-10-24 19:08:32,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855349362] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:08:32,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:08:32,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:08:32,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674607148] [2024-10-24 19:08:32,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:08:32,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:08:32,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:08:32,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:08:32,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:08:33,037 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 107 [2024-10-24 19:08:33,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 106 transitions, 215 flow. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:08:33,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:08:33,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 107 [2024-10-24 19:08:33,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:08:33,227 INFO L124 PetriNetUnfolderBase]: 64/293 cut-off events. [2024-10-24 19:08:33,230 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 19:08:33,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 462 conditions, 293 events. 64/293 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1323 event pairs, 63 based on Foata normal form. 0/226 useless extension candidates. Maximal degree in co-relation 376. Up to 157 conditions per place. [2024-10-24 19:08:33,236 INFO L140 encePairwiseOnDemand]: 91/107 looper letters, 30 selfloop transitions, 8 changer transitions 0/98 dead transitions. [2024-10-24 19:08:33,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 98 transitions, 275 flow [2024-10-24 19:08:33,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:08:33,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:08:33,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 229 transitions. [2024-10-24 19:08:33,251 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7133956386292835 [2024-10-24 19:08:33,253 INFO L175 Difference]: Start difference. First operand has 109 places, 106 transitions, 215 flow. Second operand 3 states and 229 transitions. [2024-10-24 19:08:33,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 98 transitions, 275 flow [2024-10-24 19:08:33,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 98 transitions, 274 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 19:08:33,260 INFO L231 Difference]: Finished difference. Result has 102 places, 98 transitions, 214 flow [2024-10-24 19:08:33,263 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=102, PETRI_TRANSITIONS=98} [2024-10-24 19:08:33,268 INFO L277 CegarLoopForPetriNet]: 109 programPoint places, -7 predicate places. [2024-10-24 19:08:33,269 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 98 transitions, 214 flow [2024-10-24 19:08:33,269 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:08:33,269 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:08:33,269 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-24 19:08:33,270 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 19:08:33,270 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-10-24 19:08:33,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:08:33,271 INFO L85 PathProgramCache]: Analyzing trace with hash 546602, now seen corresponding path program 1 times [2024-10-24 19:08:33,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:08:33,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746277122] [2024-10-24 19:08:33,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:08:33,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:08:33,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:08:33,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:08:33,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:08:33,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746277122] [2024-10-24 19:08:33,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746277122] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:08:33,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:08:33,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:08:33,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618823602] [2024-10-24 19:08:33,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:08:33,404 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:08:33,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:08:33,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:08:33,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:08:33,520 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 107 [2024-10-24 19:08:33,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 98 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:08:33,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:08:33,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 107 [2024-10-24 19:08:33,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:08:33,657 INFO L124 PetriNetUnfolderBase]: 64/285 cut-off events. [2024-10-24 19:08:33,658 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-10-24 19:08:33,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 458 conditions, 285 events. 64/285 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1284 event pairs, 63 based on Foata normal form. 8/226 useless extension candidates. Maximal degree in co-relation 395. Up to 157 conditions per place. [2024-10-24 19:08:33,661 INFO L140 encePairwiseOnDemand]: 91/107 looper letters, 26 selfloop transitions, 8 changer transitions 0/90 dead transitions. [2024-10-24 19:08:33,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 90 transitions, 266 flow [2024-10-24 19:08:33,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:08:33,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:08:33,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 237 transitions. [2024-10-24 19:08:33,666 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7383177570093458 [2024-10-24 19:08:33,666 INFO L175 Difference]: Start difference. First operand has 102 places, 98 transitions, 214 flow. Second operand 3 states and 237 transitions. [2024-10-24 19:08:33,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 90 transitions, 266 flow [2024-10-24 19:08:33,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 90 transitions, 250 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:08:33,669 INFO L231 Difference]: Finished difference. Result has 94 places, 90 transitions, 198 flow [2024-10-24 19:08:33,669 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=94, PETRI_TRANSITIONS=90} [2024-10-24 19:08:33,670 INFO L277 CegarLoopForPetriNet]: 109 programPoint places, -15 predicate places. [2024-10-24 19:08:33,670 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 90 transitions, 198 flow [2024-10-24 19:08:33,671 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:08:33,671 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:08:33,671 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-24 19:08:33,671 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-24 19:08:33,671 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-10-24 19:08:33,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:08:33,672 INFO L85 PathProgramCache]: Analyzing trace with hash 525300751, now seen corresponding path program 1 times [2024-10-24 19:08:33,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:08:33,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990017793] [2024-10-24 19:08:33,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:08:33,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:08:33,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:08:33,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:08:33,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:08:33,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990017793] [2024-10-24 19:08:33,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990017793] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:08:33,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:08:33,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 19:08:33,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637581877] [2024-10-24 19:08:33,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:08:33,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 19:08:33,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:08:33,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 19:08:33,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-10-24 19:08:34,117 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 107 [2024-10-24 19:08:34,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 90 transitions, 198 flow. Second operand has 6 states, 6 states have (on average 62.833333333333336) internal successors, (377), 6 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:08:34,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:08:34,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 107 [2024-10-24 19:08:34,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:08:34,244 INFO L124 PetriNetUnfolderBase]: 73/305 cut-off events. [2024-10-24 19:08:34,244 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-24 19:08:34,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 501 conditions, 305 events. 73/305 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1389 event pairs, 72 based on Foata normal form. 1/245 useless extension candidates. Maximal degree in co-relation 437. Up to 183 conditions per place. [2024-10-24 19:08:34,247 INFO L140 encePairwiseOnDemand]: 100/107 looper letters, 38 selfloop transitions, 1 changer transitions 0/84 dead transitions. [2024-10-24 19:08:34,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 84 transitions, 264 flow [2024-10-24 19:08:34,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:08:34,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:08:34,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 231 transitions. [2024-10-24 19:08:34,249 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.719626168224299 [2024-10-24 19:08:34,249 INFO L175 Difference]: Start difference. First operand has 94 places, 90 transitions, 198 flow. Second operand 3 states and 231 transitions. [2024-10-24 19:08:34,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 84 transitions, 264 flow [2024-10-24 19:08:34,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 84 transitions, 248 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:08:34,251 INFO L231 Difference]: Finished difference. Result has 88 places, 84 transitions, 172 flow [2024-10-24 19:08:34,252 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=88, PETRI_TRANSITIONS=84} [2024-10-24 19:08:34,252 INFO L277 CegarLoopForPetriNet]: 109 programPoint places, -21 predicate places. [2024-10-24 19:08:34,253 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 84 transitions, 172 flow [2024-10-24 19:08:34,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 62.833333333333336) internal successors, (377), 6 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:08:34,253 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:08:34,253 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-24 19:08:34,254 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-24 19:08:34,254 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-10-24 19:08:34,254 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:08:34,254 INFO L85 PathProgramCache]: Analyzing trace with hash 525300752, now seen corresponding path program 1 times [2024-10-24 19:08:34,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:08:34,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54532038] [2024-10-24 19:08:34,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:08:34,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:08:34,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:08:34,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:08:34,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:08:34,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54532038] [2024-10-24 19:08:34,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54532038] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:08:34,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:08:34,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 19:08:34,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866461251] [2024-10-24 19:08:34,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:08:34,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 19:08:34,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:08:34,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 19:08:34,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-24 19:08:34,655 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 107 [2024-10-24 19:08:34,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 84 transitions, 172 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:08:34,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:08:34,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 107 [2024-10-24 19:08:34,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:08:34,815 INFO L124 PetriNetUnfolderBase]: 64/291 cut-off events. [2024-10-24 19:08:34,816 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 19:08:34,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 466 conditions, 291 events. 64/291 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1224 event pairs, 63 based on Foata normal form. 0/228 useless extension candidates. Maximal degree in co-relation 460. Up to 163 conditions per place. [2024-10-24 19:08:34,818 INFO L140 encePairwiseOnDemand]: 98/107 looper letters, 37 selfloop transitions, 6 changer transitions 0/91 dead transitions. [2024-10-24 19:08:34,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 91 transitions, 272 flow [2024-10-24 19:08:34,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:08:34,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:08:34,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 274 transitions. [2024-10-24 19:08:34,821 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6401869158878505 [2024-10-24 19:08:34,822 INFO L175 Difference]: Start difference. First operand has 88 places, 84 transitions, 172 flow. Second operand 4 states and 274 transitions. [2024-10-24 19:08:34,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 91 transitions, 272 flow [2024-10-24 19:08:34,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 91 transitions, 271 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 19:08:34,826 INFO L231 Difference]: Finished difference. Result has 92 places, 89 transitions, 219 flow [2024-10-24 19:08:34,826 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=219, PETRI_PLACES=92, PETRI_TRANSITIONS=89} [2024-10-24 19:08:34,827 INFO L277 CegarLoopForPetriNet]: 109 programPoint places, -17 predicate places. [2024-10-24 19:08:34,827 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 89 transitions, 219 flow [2024-10-24 19:08:34,828 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:08:34,828 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:08:34,828 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:08:34,828 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-24 19:08:34,829 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-10-24 19:08:34,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:08:34,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1146614251, now seen corresponding path program 1 times [2024-10-24 19:08:34,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:08:34,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249803040] [2024-10-24 19:08:34,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:08:34,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:08:34,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:08:35,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:08:35,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:08:35,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249803040] [2024-10-24 19:08:35,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249803040] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:08:35,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:08:35,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-24 19:08:35,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35101487] [2024-10-24 19:08:35,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:08:35,087 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 19:08:35,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:08:35,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 19:08:35,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-24 19:08:35,446 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 107 [2024-10-24 19:08:35,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 89 transitions, 219 flow. Second operand has 7 states, 7 states have (on average 53.285714285714285) internal successors, (373), 7 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:08:35,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:08:35,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 107 [2024-10-24 19:08:35,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:08:35,644 INFO L124 PetriNetUnfolderBase]: 64/285 cut-off events. [2024-10-24 19:08:35,645 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-24 19:08:35,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 491 conditions, 285 events. 64/285 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1182 event pairs, 63 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 482. Up to 154 conditions per place. [2024-10-24 19:08:35,647 INFO L140 encePairwiseOnDemand]: 90/107 looper letters, 30 selfloop transitions, 18 changer transitions 0/85 dead transitions. [2024-10-24 19:08:35,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 85 transitions, 307 flow [2024-10-24 19:08:35,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 19:08:35,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-24 19:08:35,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 463 transitions. [2024-10-24 19:08:35,651 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5408878504672897 [2024-10-24 19:08:35,651 INFO L175 Difference]: Start difference. First operand has 92 places, 89 transitions, 219 flow. Second operand 8 states and 463 transitions. [2024-10-24 19:08:35,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 85 transitions, 307 flow [2024-10-24 19:08:35,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 85 transitions, 305 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 19:08:35,654 INFO L231 Difference]: Finished difference. Result has 94 places, 85 transitions, 245 flow [2024-10-24 19:08:35,654 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=245, PETRI_PLACES=94, PETRI_TRANSITIONS=85} [2024-10-24 19:08:35,655 INFO L277 CegarLoopForPetriNet]: 109 programPoint places, -15 predicate places. [2024-10-24 19:08:35,655 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 85 transitions, 245 flow [2024-10-24 19:08:35,656 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 53.285714285714285) internal successors, (373), 7 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:08:35,656 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:08:35,656 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:08:35,657 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-24 19:08:35,657 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-10-24 19:08:35,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:08:35,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1146614252, now seen corresponding path program 1 times [2024-10-24 19:08:35,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:08:35,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718284133] [2024-10-24 19:08:35,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:08:35,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:08:35,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:08:36,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:08:36,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:08:36,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718284133] [2024-10-24 19:08:36,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718284133] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:08:36,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:08:36,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-24 19:08:36,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050654407] [2024-10-24 19:08:36,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:08:36,043 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 19:08:36,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:08:36,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 19:08:36,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-24 19:08:36,675 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 107 [2024-10-24 19:08:36,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 85 transitions, 245 flow. Second operand has 7 states, 7 states have (on average 48.285714285714285) internal successors, (338), 7 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) [2024-10-24 19:08:36,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:08:36,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 107 [2024-10-24 19:08:36,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:08:36,866 INFO L124 PetriNetUnfolderBase]: 64/281 cut-off events. [2024-10-24 19:08:36,866 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-10-24 19:08:36,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 503 conditions, 281 events. 64/281 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1180 event pairs, 63 based on Foata normal form. 2/234 useless extension candidates. Maximal degree in co-relation 494. Up to 158 conditions per place. [2024-10-24 19:08:36,868 INFO L140 encePairwiseOnDemand]: 95/107 looper letters, 32 selfloop transitions, 15 changer transitions 0/83 dead transitions. [2024-10-24 19:08:36,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 83 transitions, 335 flow [2024-10-24 19:08:36,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-24 19:08:36,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-24 19:08:36,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 373 transitions. [2024-10-24 19:08:36,870 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4979973297730307 [2024-10-24 19:08:36,870 INFO L175 Difference]: Start difference. First operand has 94 places, 85 transitions, 245 flow. Second operand 7 states and 373 transitions. [2024-10-24 19:08:36,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 83 transitions, 335 flow [2024-10-24 19:08:36,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 83 transitions, 299 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-10-24 19:08:36,873 INFO L231 Difference]: Finished difference. Result has 91 places, 83 transitions, 235 flow [2024-10-24 19:08:36,873 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=235, PETRI_PLACES=91, PETRI_TRANSITIONS=83} [2024-10-24 19:08:36,874 INFO L277 CegarLoopForPetriNet]: 109 programPoint places, -18 predicate places. [2024-10-24 19:08:36,874 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 83 transitions, 235 flow [2024-10-24 19:08:36,874 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 48.285714285714285) internal successors, (338), 7 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) [2024-10-24 19:08:36,874 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:08:36,875 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:08:36,875 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-24 19:08:36,875 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-10-24 19:08:36,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:08:36,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1910280929, now seen corresponding path program 1 times [2024-10-24 19:08:36,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:08:36,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591566218] [2024-10-24 19:08:36,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:08:36,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:08:36,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:08:36,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:08:36,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:08:36,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591566218] [2024-10-24 19:08:36,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591566218] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:08:36,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:08:36,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 19:08:36,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441659603] [2024-10-24 19:08:36,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:08:36,974 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 19:08:36,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:08:36,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 19:08:36,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 19:08:37,210 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 107 [2024-10-24 19:08:37,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 83 transitions, 235 flow. Second operand has 5 states, 5 states have (on average 60.0) internal successors, (300), 5 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:08:37,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:08:37,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 107 [2024-10-24 19:08:37,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:08:37,368 INFO L124 PetriNetUnfolderBase]: 64/279 cut-off events. [2024-10-24 19:08:37,369 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-10-24 19:08:37,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496 conditions, 279 events. 64/279 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1165 event pairs, 63 based on Foata normal form. 2/231 useless extension candidates. Maximal degree in co-relation 487. Up to 158 conditions per place. [2024-10-24 19:08:37,370 INFO L140 encePairwiseOnDemand]: 96/107 looper letters, 30 selfloop transitions, 15 changer transitions 0/82 dead transitions. [2024-10-24 19:08:37,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 82 transitions, 323 flow [2024-10-24 19:08:37,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 19:08:37,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 19:08:37,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 331 transitions. [2024-10-24 19:08:37,372 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6186915887850467 [2024-10-24 19:08:37,372 INFO L175 Difference]: Start difference. First operand has 91 places, 83 transitions, 235 flow. Second operand 5 states and 331 transitions. [2024-10-24 19:08:37,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 82 transitions, 323 flow [2024-10-24 19:08:37,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 82 transitions, 293 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-24 19:08:37,375 INFO L231 Difference]: Finished difference. Result has 88 places, 82 transitions, 233 flow [2024-10-24 19:08:37,375 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=233, PETRI_PLACES=88, PETRI_TRANSITIONS=82} [2024-10-24 19:08:37,376 INFO L277 CegarLoopForPetriNet]: 109 programPoint places, -21 predicate places. [2024-10-24 19:08:37,376 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 82 transitions, 233 flow [2024-10-24 19:08:37,376 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 60.0) internal successors, (300), 5 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:08:37,376 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:08:37,377 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:08:37,377 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-24 19:08:37,377 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-10-24 19:08:37,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:08:37,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1910280928, now seen corresponding path program 1 times [2024-10-24 19:08:37,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:08:37,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483448210] [2024-10-24 19:08:37,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:08:37,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:08:37,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:08:37,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:08:37,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:08:37,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483448210] [2024-10-24 19:08:37,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483448210] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:08:37,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:08:37,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 19:08:37,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554553668] [2024-10-24 19:08:37,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:08:37,540 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 19:08:37,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:08:37,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 19:08:37,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 19:08:37,757 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 107 [2024-10-24 19:08:37,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 82 transitions, 233 flow. Second operand has 5 states, 5 states have (on average 63.6) internal successors, (318), 5 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:08:37,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:08:37,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 107 [2024-10-24 19:08:37,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:08:37,885 INFO L124 PetriNetUnfolderBase]: 64/277 cut-off events. [2024-10-24 19:08:37,886 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-10-24 19:08:37,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 488 conditions, 277 events. 64/277 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1161 event pairs, 63 based on Foata normal form. 2/229 useless extension candidates. Maximal degree in co-relation 479. Up to 158 conditions per place. [2024-10-24 19:08:37,887 INFO L140 encePairwiseOnDemand]: 96/107 looper letters, 26 selfloop transitions, 15 changer transitions 0/81 dead transitions. [2024-10-24 19:08:37,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 81 transitions, 313 flow [2024-10-24 19:08:37,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 19:08:37,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 19:08:37,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 347 transitions. [2024-10-24 19:08:37,889 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6485981308411215 [2024-10-24 19:08:37,889 INFO L175 Difference]: Start difference. First operand has 88 places, 82 transitions, 233 flow. Second operand 5 states and 347 transitions. [2024-10-24 19:08:37,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 81 transitions, 313 flow [2024-10-24 19:08:37,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 81 transitions, 283 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-24 19:08:37,892 INFO L231 Difference]: Finished difference. Result has 87 places, 81 transitions, 231 flow [2024-10-24 19:08:37,892 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=231, PETRI_PLACES=87, PETRI_TRANSITIONS=81} [2024-10-24 19:08:37,893 INFO L277 CegarLoopForPetriNet]: 109 programPoint places, -22 predicate places. [2024-10-24 19:08:37,893 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 81 transitions, 231 flow [2024-10-24 19:08:37,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 63.6) internal successors, (318), 5 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:08:37,895 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:08:37,895 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:08:37,896 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-24 19:08:37,899 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-10-24 19:08:37,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:08:37,900 INFO L85 PathProgramCache]: Analyzing trace with hash -949831031, now seen corresponding path program 1 times [2024-10-24 19:08:37,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:08:37,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554875438] [2024-10-24 19:08:37,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:08:37,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:08:37,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:08:38,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:08:38,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:08:38,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554875438] [2024-10-24 19:08:38,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554875438] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 19:08:38,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110537196] [2024-10-24 19:08:38,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:08:38,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:08:38,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:08:38,246 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 19:08:38,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 19:08:38,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:08:38,392 INFO L255 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-24 19:08:38,397 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:08:38,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:08:38,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-24 19:08:38,565 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-24 19:08:38,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-10-24 19:08:38,592 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-24 19:08:38,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-24 19:08:38,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:08:38,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-24 19:08:38,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:08:38,759 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:08:38,988 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 19:08:38,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-10-24 19:08:39,074 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-24 19:08:39,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-10-24 19:08:39,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:08:39,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110537196] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:08:39,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 19:08:39,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 16 [2024-10-24 19:08:39,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262703779] [2024-10-24 19:08:39,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 19:08:39,155 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-24 19:08:39,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:08:39,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-24 19:08:39,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2024-10-24 19:08:41,422 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 107 [2024-10-24 19:08:41,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 81 transitions, 231 flow. Second operand has 18 states, 18 states have (on average 57.833333333333336) internal successors, (1041), 18 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:08:41,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:08:41,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 107 [2024-10-24 19:08:41,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:08:41,925 INFO L124 PetriNetUnfolderBase]: 75/332 cut-off events. [2024-10-24 19:08:41,926 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2024-10-24 19:08:41,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 611 conditions, 332 events. 75/332 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1455 event pairs, 72 based on Foata normal form. 6/281 useless extension candidates. Maximal degree in co-relation 602. Up to 178 conditions per place. [2024-10-24 19:08:41,927 INFO L140 encePairwiseOnDemand]: 98/107 looper letters, 46 selfloop transitions, 16 changer transitions 0/101 dead transitions. [2024-10-24 19:08:41,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 101 transitions, 459 flow [2024-10-24 19:08:41,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-24 19:08:41,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-24 19:08:41,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 573 transitions. [2024-10-24 19:08:41,930 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5950155763239875 [2024-10-24 19:08:41,930 INFO L175 Difference]: Start difference. First operand has 87 places, 81 transitions, 231 flow. Second operand 9 states and 573 transitions. [2024-10-24 19:08:41,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 101 transitions, 459 flow [2024-10-24 19:08:41,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 101 transitions, 393 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-24 19:08:41,934 INFO L231 Difference]: Finished difference. Result has 95 places, 89 transitions, 305 flow [2024-10-24 19:08:41,934 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=305, PETRI_PLACES=95, PETRI_TRANSITIONS=89} [2024-10-24 19:08:41,934 INFO L277 CegarLoopForPetriNet]: 109 programPoint places, -14 predicate places. [2024-10-24 19:08:41,935 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 89 transitions, 305 flow [2024-10-24 19:08:41,938 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 57.833333333333336) internal successors, (1041), 18 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:08:41,938 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:08:41,938 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-10-24 19:08:41,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-24 19:08:42,139 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:08:42,139 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-10-24 19:08:42,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:08:42,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1666266677, now seen corresponding path program 1 times [2024-10-24 19:08:42,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:08:42,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704078337] [2024-10-24 19:08:42,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:08:42,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:08:42,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:08:42,318 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:08:42,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:08:42,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704078337] [2024-10-24 19:08:42,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704078337] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 19:08:42,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003872045] [2024-10-24 19:08:42,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:08:42,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:08:42,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:08:42,322 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 19:08:42,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-24 19:08:42,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:08:42,524 INFO L255 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-24 19:08:42,526 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:08:42,564 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:08:42,565 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:08:42,619 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:08:42,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003872045] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:08:42,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 19:08:42,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-10-24 19:08:42,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97354507] [2024-10-24 19:08:42,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 19:08:42,620 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-24 19:08:42,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:08:42,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-24 19:08:42,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-10-24 19:08:42,638 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 107 [2024-10-24 19:08:42,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 89 transitions, 305 flow. Second operand has 9 states, 9 states have (on average 77.55555555555556) internal successors, (698), 9 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:08:42,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:08:42,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 107 [2024-10-24 19:08:42,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:08:42,848 INFO L124 PetriNetUnfolderBase]: 64/318 cut-off events. [2024-10-24 19:08:42,849 INFO L125 PetriNetUnfolderBase]: For 108/108 co-relation queries the response was YES. [2024-10-24 19:08:42,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 618 conditions, 318 events. 64/318 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1129 event pairs, 63 based on Foata normal form. 4/272 useless extension candidates. Maximal degree in co-relation 603. Up to 154 conditions per place. [2024-10-24 19:08:42,851 INFO L140 encePairwiseOnDemand]: 103/107 looper letters, 62 selfloop transitions, 8 changer transitions 0/111 dead transitions. [2024-10-24 19:08:42,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 111 transitions, 541 flow [2024-10-24 19:08:42,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 19:08:42,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-24 19:08:42,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 658 transitions. [2024-10-24 19:08:42,853 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7686915887850467 [2024-10-24 19:08:42,853 INFO L175 Difference]: Start difference. First operand has 95 places, 89 transitions, 305 flow. Second operand 8 states and 658 transitions. [2024-10-24 19:08:42,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 111 transitions, 541 flow [2024-10-24 19:08:42,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 111 transitions, 521 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-10-24 19:08:42,856 INFO L231 Difference]: Finished difference. Result has 103 places, 90 transitions, 321 flow [2024-10-24 19:08:42,857 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=321, PETRI_PLACES=103, PETRI_TRANSITIONS=90} [2024-10-24 19:08:42,857 INFO L277 CegarLoopForPetriNet]: 109 programPoint places, -6 predicate places. [2024-10-24 19:08:42,857 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 90 transitions, 321 flow [2024-10-24 19:08:42,858 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 77.55555555555556) internal successors, (698), 9 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:08:42,858 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:08:42,858 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1] [2024-10-24 19:08:42,876 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-24 19:08:43,062 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-24 19:08:43,063 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-10-24 19:08:43,063 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:08:43,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1380629108, now seen corresponding path program 2 times [2024-10-24 19:08:43,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:08:43,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725217168] [2024-10-24 19:08:43,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:08:43,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:08:43,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:08:45,037 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:08:45,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:08:45,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725217168] [2024-10-24 19:08:45,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725217168] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 19:08:45,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823205087] [2024-10-24 19:08:45,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 19:08:45,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:08:45,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:08:45,042 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 19:08:45,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-24 19:08:45,357 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 19:08:45,358 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:08:45,362 INFO L255 TraceCheckSpWp]: Trace formula consists of 888 conjuncts, 93 conjuncts are in the unsatisfiable core [2024-10-24 19:08:45,367 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:08:45,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:08:45,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-24 19:08:45,478 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-24 19:08:45,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-10-24 19:08:45,497 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-24 19:08:45,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-24 19:08:45,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:08:45,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-24 19:08:45,693 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-24 19:08:45,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-24 19:08:45,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-24 19:08:45,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:08:45,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-24 19:08:45,904 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-24 19:08:45,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-10-24 19:08:45,917 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-24 19:08:45,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-24 19:08:46,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:08:46,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-24 19:08:46,123 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-24 19:08:46,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-10-24 19:08:46,142 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-24 19:08:46,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-24 19:08:46,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:08:46,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-24 19:08:46,340 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:08:46,340 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:08:46,600 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 19:08:46,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-10-24 19:08:46,680 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-24 19:08:46,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-10-24 19:08:46,900 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 19:08:46,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-10-24 19:08:46,981 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-24 19:08:46,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-10-24 19:08:47,196 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 19:08:47,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-10-24 19:08:47,274 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-24 19:08:47,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-10-24 19:08:47,493 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 19:08:47,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-10-24 19:08:47,589 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-24 19:08:47,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-10-24 19:08:47,671 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:08:47,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823205087] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:08:47,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 19:08:47,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 10] total 44 [2024-10-24 19:08:47,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052355041] [2024-10-24 19:08:47,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 19:08:47,673 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-10-24 19:08:47,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:08:47,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-10-24 19:08:47,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=1737, Unknown=0, NotChecked=0, Total=2070 [2024-10-24 19:09:00,013 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 107 [2024-10-24 19:09:00,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 90 transitions, 321 flow. Second operand has 46 states, 46 states have (on average 58.08695652173913) internal successors, (2672), 46 states have internal predecessors, (2672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:09:00,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:09:00,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 107 [2024-10-24 19:09:00,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:09:01,494 INFO L124 PetriNetUnfolderBase]: 77/394 cut-off events. [2024-10-24 19:09:01,495 INFO L125 PetriNetUnfolderBase]: For 263/263 co-relation queries the response was YES. [2024-10-24 19:09:01,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 840 conditions, 394 events. 77/394 cut-off events. For 263/263 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1530 event pairs, 72 based on Foata normal form. 6/346 useless extension candidates. Maximal degree in co-relation 821. Up to 180 conditions per place. [2024-10-24 19:09:01,497 INFO L140 encePairwiseOnDemand]: 99/107 looper letters, 70 selfloop transitions, 36 changer transitions 0/145 dead transitions. [2024-10-24 19:09:01,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 145 transitions, 867 flow [2024-10-24 19:09:01,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-24 19:09:01,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-10-24 19:09:01,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1288 transitions. [2024-10-24 19:09:01,502 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.573208722741433 [2024-10-24 19:09:01,502 INFO L175 Difference]: Start difference. First operand has 103 places, 90 transitions, 321 flow. Second operand 21 states and 1288 transitions. [2024-10-24 19:09:01,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 145 transitions, 867 flow [2024-10-24 19:09:01,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 145 transitions, 851 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-10-24 19:09:01,506 INFO L231 Difference]: Finished difference. Result has 130 places, 110 transitions, 629 flow [2024-10-24 19:09:01,506 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=629, PETRI_PLACES=130, PETRI_TRANSITIONS=110} [2024-10-24 19:09:01,507 INFO L277 CegarLoopForPetriNet]: 109 programPoint places, 21 predicate places. [2024-10-24 19:09:01,507 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 110 transitions, 629 flow [2024-10-24 19:09:01,508 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 58.08695652173913) internal successors, (2672), 46 states have internal predecessors, (2672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:09:01,508 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:09:01,508 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1] [2024-10-24 19:09:01,522 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-24 19:09:01,708 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:09:01,708 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-10-24 19:09:01,709 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:09:01,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1124791855, now seen corresponding path program 2 times [2024-10-24 19:09:01,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:09:01,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247333380] [2024-10-24 19:09:01,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:09:01,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:09:01,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:09:02,148 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:09:02,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:09:02,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247333380] [2024-10-24 19:09:02,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247333380] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 19:09:02,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541312904] [2024-10-24 19:09:02,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 19:09:02,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:09:02,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:09:02,151 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 19:09:02,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-24 19:09:02,536 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 19:09:02,537 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:09:02,543 INFO L255 TraceCheckSpWp]: Trace formula consists of 1288 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 19:09:02,547 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:09:02,626 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:09:02,627 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:09:02,741 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:09:02,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541312904] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:09:02,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 19:09:02,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2024-10-24 19:09:02,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861015193] [2024-10-24 19:09:02,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 19:09:02,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-24 19:09:02,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:09:02,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-24 19:09:02,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-10-24 19:09:02,768 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 107 [2024-10-24 19:09:02,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 110 transitions, 629 flow. Second operand has 13 states, 13 states have (on average 78.84615384615384) internal successors, (1025), 13 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:09:02,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:09:02,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 107 [2024-10-24 19:09:02,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:09:02,971 INFO L124 PetriNetUnfolderBase]: 64/360 cut-off events. [2024-10-24 19:09:02,971 INFO L125 PetriNetUnfolderBase]: For 579/579 co-relation queries the response was YES. [2024-10-24 19:09:02,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 867 conditions, 360 events. 64/360 cut-off events. For 579/579 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1133 event pairs, 63 based on Foata normal form. 4/314 useless extension candidates. Maximal degree in co-relation 837. Up to 154 conditions per place. [2024-10-24 19:09:02,974 INFO L140 encePairwiseOnDemand]: 103/107 looper letters, 87 selfloop transitions, 12 changer transitions 0/140 dead transitions. [2024-10-24 19:09:02,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 140 transitions, 983 flow [2024-10-24 19:09:02,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-24 19:09:02,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-24 19:09:02,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 978 transitions. [2024-10-24 19:09:02,977 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7616822429906542 [2024-10-24 19:09:02,977 INFO L175 Difference]: Start difference. First operand has 130 places, 110 transitions, 629 flow. Second operand 12 states and 978 transitions. [2024-10-24 19:09:02,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 140 transitions, 983 flow [2024-10-24 19:09:02,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 140 transitions, 859 flow, removed 35 selfloop flow, removed 11 redundant places. [2024-10-24 19:09:02,984 INFO L231 Difference]: Finished difference. Result has 131 places, 107 transitions, 493 flow [2024-10-24 19:09:02,984 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=493, PETRI_PLACES=131, PETRI_TRANSITIONS=107} [2024-10-24 19:09:02,985 INFO L277 CegarLoopForPetriNet]: 109 programPoint places, 22 predicate places. [2024-10-24 19:09:02,987 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 107 transitions, 493 flow [2024-10-24 19:09:02,987 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 78.84615384615384) internal successors, (1025), 13 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:09:02,987 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:09:02,988 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1] [2024-10-24 19:09:03,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-24 19:09:03,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:09:03,191 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 71 more)] === [2024-10-24 19:09:03,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:09:03,192 INFO L85 PathProgramCache]: Analyzing trace with hash -748936566, now seen corresponding path program 3 times [2024-10-24 19:09:03,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:09:03,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816995320] [2024-10-24 19:09:03,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:09:03,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:09:03,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:09:03,915 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 399 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:09:03,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:09:03,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816995320] [2024-10-24 19:09:03,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816995320] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 19:09:03,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076683199] [2024-10-24 19:09:03,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 19:09:03,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:09:03,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:09:03,917 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 19:09:03,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process