./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_17-arrayloop_nr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_17-arrayloop_nr.i -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b29c7049a333b10d890b8afae901738020ed1f084c2a7d471b316f0abdba3430 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 19:44:31,334 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 19:44:31,390 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-11 19:44:31,395 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 19:44:31,397 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 19:44:31,421 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 19:44:31,423 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 19:44:31,423 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 19:44:31,424 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 19:44:31,425 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 19:44:31,426 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 19:44:31,426 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 19:44:31,427 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 19:44:31,427 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 19:44:31,427 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 19:44:31,427 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 19:44:31,427 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 19:44:31,428 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 19:44:31,428 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 19:44:31,431 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 19:44:31,431 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-11 19:44:31,432 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-11 19:44:31,432 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-11 19:44:31,432 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 19:44:31,432 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-11 19:44:31,433 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 19:44:31,433 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-11 19:44:31,433 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 19:44:31,433 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 19:44:31,433 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 19:44:31,434 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 19:44:31,434 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 19:44:31,434 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 19:44:31,434 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:44:31,435 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 19:44:31,435 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 19:44:31,435 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 19:44:31,436 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 19:44:31,436 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 19:44:31,436 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 19:44:31,436 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 19:44:31,437 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 19:44:31,437 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b29c7049a333b10d890b8afae901738020ed1f084c2a7d471b316f0abdba3430 [2024-10-11 19:44:31,644 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 19:44:31,664 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 19:44:31,667 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 19:44:31,668 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 19:44:31,668 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 19:44:31,669 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_17-arrayloop_nr.i [2024-10-11 19:44:32,977 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 19:44:33,260 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 19:44:33,260 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_17-arrayloop_nr.i [2024-10-11 19:44:33,281 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/5720f0e5a/2e1e539380964eae8da7142494396268/FLAG4d361aaf1 [2024-10-11 19:44:33,292 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/5720f0e5a/2e1e539380964eae8da7142494396268 [2024-10-11 19:44:33,294 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 19:44:33,295 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 19:44:33,296 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 19:44:33,296 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 19:44:33,302 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 19:44:33,303 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:44:33" (1/1) ... [2024-10-11 19:44:33,304 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5996f0dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:44:33, skipping insertion in model container [2024-10-11 19:44:33,304 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:44:33" (1/1) ... [2024-10-11 19:44:33,342 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 19:44:33,942 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:44:33,962 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 19:44:33,999 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:44:34,061 INFO L204 MainTranslator]: Completed translation [2024-10-11 19:44:34,062 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:44:34 WrapperNode [2024-10-11 19:44:34,062 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 19:44:34,063 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 19:44:34,063 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 19:44:34,063 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 19:44:34,068 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:44:34" (1/1) ... [2024-10-11 19:44:34,093 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:44:34" (1/1) ... [2024-10-11 19:44:34,131 INFO L138 Inliner]: procedures = 368, calls = 26, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 122 [2024-10-11 19:44:34,132 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 19:44:34,136 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 19:44:34,137 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 19:44:34,137 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 19:44:34,150 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:44:34" (1/1) ... [2024-10-11 19:44:34,150 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:44:34" (1/1) ... [2024-10-11 19:44:34,157 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:44:34" (1/1) ... [2024-10-11 19:44:34,177 INFO L175 MemorySlicer]: Split 20 memory accesses to 3 slices as follows [1, 14, 5]. 70 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0, 0]. The 13 writes are split as follows [1, 10, 2]. [2024-10-11 19:44:34,178 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:44:34" (1/1) ... [2024-10-11 19:44:34,178 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:44:34" (1/1) ... [2024-10-11 19:44:34,184 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:44:34" (1/1) ... [2024-10-11 19:44:34,186 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:44:34" (1/1) ... [2024-10-11 19:44:34,187 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:44:34" (1/1) ... [2024-10-11 19:44:34,188 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:44:34" (1/1) ... [2024-10-11 19:44:34,194 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 19:44:34,195 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 19:44:34,195 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 19:44:34,195 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 19:44:34,196 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:44:34" (1/1) ... [2024-10-11 19:44:34,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:44:34,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:44:34,231 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 19:44:34,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 19:44:34,266 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-10-11 19:44:34,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-10-11 19:44:34,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-10-11 19:44:34,267 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-11 19:44:34,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 19:44:34,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 19:44:34,268 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-11 19:44:34,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 19:44:34,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 19:44:34,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-11 19:44:34,268 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-11 19:44:34,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-11 19:44:34,271 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 19:44:34,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-10-11 19:44:34,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-10-11 19:44:34,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-10-11 19:44:34,272 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-10-11 19:44:34,272 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-10-11 19:44:34,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 19:44:34,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 19:44:34,273 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 19:44:34,414 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 19:44:34,416 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 19:44:34,700 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 19:44:34,700 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 19:44:34,821 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 19:44:34,822 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-11 19:44:34,823 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:44:34 BoogieIcfgContainer [2024-10-11 19:44:34,823 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 19:44:34,825 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 19:44:34,825 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 19:44:34,828 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 19:44:34,828 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 07:44:33" (1/3) ... [2024-10-11 19:44:34,829 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45a86e99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:44:34, skipping insertion in model container [2024-10-11 19:44:34,829 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:44:34" (2/3) ... [2024-10-11 19:44:34,829 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45a86e99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:44:34, skipping insertion in model container [2024-10-11 19:44:34,830 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:44:34" (3/3) ... [2024-10-11 19:44:34,831 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_17-arrayloop_nr.i [2024-10-11 19:44:34,844 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 19:44:34,844 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 37 error locations. [2024-10-11 19:44:34,844 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 19:44:34,917 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 19:44:34,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 75 transitions, 154 flow [2024-10-11 19:44:35,004 INFO L124 PetriNetUnfolderBase]: 3/74 cut-off events. [2024-10-11 19:44:35,004 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:44:35,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 74 events. 3/74 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 240 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 61. Up to 2 conditions per place. [2024-10-11 19:44:35,008 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 75 transitions, 154 flow [2024-10-11 19:44:35,013 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 74 transitions, 151 flow [2024-10-11 19:44:35,024 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 19:44:35,029 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;@585e2d84, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 19:44:35,030 INFO L334 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2024-10-11 19:44:35,032 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 19:44:35,034 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-11 19:44:35,034 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:44:35,034 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:44:35,035 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:44:35,035 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-11 19:44:35,039 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:44:35,039 INFO L85 PathProgramCache]: Analyzing trace with hash 376447, now seen corresponding path program 1 times [2024-10-11 19:44:35,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:44:35,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272125095] [2024-10-11 19:44:35,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:44:35,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:44:35,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:44:35,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:44:35,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:44:35,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272125095] [2024-10-11 19:44:35,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272125095] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:44:35,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:44:35,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:44:35,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403195548] [2024-10-11 19:44:35,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:44:35,306 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:44:35,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:44:35,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:44:35,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:44:35,399 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 75 [2024-10-11 19:44:35,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 74 transitions, 151 flow. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:44:35,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:44:35,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 75 [2024-10-11 19:44:35,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:44:35,594 INFO L124 PetriNetUnfolderBase]: 142/528 cut-off events. [2024-10-11 19:44:35,596 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:44:35,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 820 conditions, 528 events. 142/528 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3259 event pairs, 99 based on Foata normal form. 0/402 useless extension candidates. Maximal degree in co-relation 797. Up to 246 conditions per place. [2024-10-11 19:44:35,604 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 37 selfloop transitions, 4 changer transitions 0/80 dead transitions. [2024-10-11 19:44:35,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 80 transitions, 245 flow [2024-10-11 19:44:35,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:44:35,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:44:35,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 165 transitions. [2024-10-11 19:44:35,617 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7333333333333333 [2024-10-11 19:44:35,619 INFO L175 Difference]: Start difference. First operand has 75 places, 74 transitions, 151 flow. Second operand 3 states and 165 transitions. [2024-10-11 19:44:35,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 80 transitions, 245 flow [2024-10-11 19:44:35,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 80 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 19:44:35,628 INFO L231 Difference]: Finished difference. Result has 72 places, 70 transitions, 150 flow [2024-10-11 19:44:35,630 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=72, PETRI_TRANSITIONS=70} [2024-10-11 19:44:35,636 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, -3 predicate places. [2024-10-11 19:44:35,636 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 70 transitions, 150 flow [2024-10-11 19:44:35,637 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:44:35,637 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:44:35,637 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:44:35,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 19:44:35,638 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-11 19:44:35,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:44:35,642 INFO L85 PathProgramCache]: Analyzing trace with hash 376448, now seen corresponding path program 1 times [2024-10-11 19:44:35,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:44:35,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633030265] [2024-10-11 19:44:35,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:44:35,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:44:35,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:44:35,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:44:35,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:44:35,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633030265] [2024-10-11 19:44:35,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633030265] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:44:35,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:44:35,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:44:35,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947326725] [2024-10-11 19:44:35,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:44:35,737 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:44:35,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:44:35,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:44:35,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:44:35,841 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 75 [2024-10-11 19:44:35,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 70 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:44:35,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:44:35,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 75 [2024-10-11 19:44:35,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:44:35,986 INFO L124 PetriNetUnfolderBase]: 132/496 cut-off events. [2024-10-11 19:44:35,986 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-10-11 19:44:35,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 789 conditions, 496 events. 132/496 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3019 event pairs, 99 based on Foata normal form. 22/393 useless extension candidates. Maximal degree in co-relation 767. Up to 246 conditions per place. [2024-10-11 19:44:35,992 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 35 selfloop transitions, 4 changer transitions 0/76 dead transitions. [2024-10-11 19:44:35,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 76 transitions, 240 flow [2024-10-11 19:44:35,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:44:35,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:44:35,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 169 transitions. [2024-10-11 19:44:35,995 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7511111111111111 [2024-10-11 19:44:35,995 INFO L175 Difference]: Start difference. First operand has 72 places, 70 transitions, 150 flow. Second operand 3 states and 169 transitions. [2024-10-11 19:44:35,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 76 transitions, 240 flow [2024-10-11 19:44:35,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 76 transitions, 232 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:44:35,998 INFO L231 Difference]: Finished difference. Result has 68 places, 66 transitions, 142 flow [2024-10-11 19:44:35,999 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=68, PETRI_TRANSITIONS=66} [2024-10-11 19:44:36,000 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, -7 predicate places. [2024-10-11 19:44:36,001 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 66 transitions, 142 flow [2024-10-11 19:44:36,001 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:44:36,001 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:44:36,001 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-11 19:44:36,001 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 19:44:36,001 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-11 19:44:36,002 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:44:36,002 INFO L85 PathProgramCache]: Analyzing trace with hash 361776193, now seen corresponding path program 1 times [2024-10-11 19:44:36,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:44:36,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926392848] [2024-10-11 19:44:36,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:44:36,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:44:36,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:44:36,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:44:36,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:44:36,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926392848] [2024-10-11 19:44:36,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926392848] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:44:36,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:44:36,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-11 19:44:36,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299162300] [2024-10-11 19:44:36,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:44:36,191 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 19:44:36,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:44:36,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 19:44:36,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-10-11 19:44:36,295 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 75 [2024-10-11 19:44:36,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 66 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 39.833333333333336) internal successors, (239), 6 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:44:36,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:44:36,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 75 [2024-10-11 19:44:36,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:44:36,389 INFO L124 PetriNetUnfolderBase]: 152/522 cut-off events. [2024-10-11 19:44:36,390 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-10-11 19:44:36,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 856 conditions, 522 events. 152/522 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3105 event pairs, 126 based on Foata normal form. 0/412 useless extension candidates. Maximal degree in co-relation 834. Up to 307 conditions per place. [2024-10-11 19:44:36,393 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 31 selfloop transitions, 1 changer transitions 0/62 dead transitions. [2024-10-11 19:44:36,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 62 transitions, 198 flow [2024-10-11 19:44:36,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:44:36,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:44:36,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 153 transitions. [2024-10-11 19:44:36,394 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-10-11 19:44:36,394 INFO L175 Difference]: Start difference. First operand has 68 places, 66 transitions, 142 flow. Second operand 3 states and 153 transitions. [2024-10-11 19:44:36,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 62 transitions, 198 flow [2024-10-11 19:44:36,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 62 transitions, 190 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:44:36,396 INFO L231 Difference]: Finished difference. Result has 64 places, 62 transitions, 128 flow [2024-10-11 19:44:36,396 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=64, PETRI_TRANSITIONS=62} [2024-10-11 19:44:36,397 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, -11 predicate places. [2024-10-11 19:44:36,397 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 62 transitions, 128 flow [2024-10-11 19:44:36,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 39.833333333333336) internal successors, (239), 6 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:44:36,397 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:44:36,397 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-11 19:44:36,397 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-11 19:44:36,397 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-11 19:44:36,398 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:44:36,399 INFO L85 PathProgramCache]: Analyzing trace with hash 361776194, now seen corresponding path program 1 times [2024-10-11 19:44:36,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:44:36,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472622419] [2024-10-11 19:44:36,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:44:36,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:44:36,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:44:36,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:44:36,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:44:36,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472622419] [2024-10-11 19:44:36,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472622419] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:44:36,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:44:36,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:44:36,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727311760] [2024-10-11 19:44:36,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:44:36,557 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 19:44:36,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:44:36,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 19:44:36,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-11 19:44:36,694 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 75 [2024-10-11 19:44:36,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 62 transitions, 128 flow. Second operand has 5 states, 5 states have (on average 35.8) internal successors, (179), 5 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:44:36,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:44:36,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 75 [2024-10-11 19:44:36,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:44:36,822 INFO L124 PetriNetUnfolderBase]: 152/525 cut-off events. [2024-10-11 19:44:36,823 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:44:36,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 841 conditions, 525 events. 152/525 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3123 event pairs, 126 based on Foata normal form. 0/401 useless extension candidates. Maximal degree in co-relation 835. Up to 308 conditions per place. [2024-10-11 19:44:36,825 INFO L140 encePairwiseOnDemand]: 69/75 looper letters, 31 selfloop transitions, 4 changer transitions 0/65 dead transitions. [2024-10-11 19:44:36,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 65 transitions, 204 flow [2024-10-11 19:44:36,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:44:36,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:44:36,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 177 transitions. [2024-10-11 19:44:36,826 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-10-11 19:44:36,826 INFO L175 Difference]: Start difference. First operand has 64 places, 62 transitions, 128 flow. Second operand 4 states and 177 transitions. [2024-10-11 19:44:36,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 65 transitions, 204 flow [2024-10-11 19:44:36,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 65 transitions, 203 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 19:44:36,829 INFO L231 Difference]: Finished difference. Result has 68 places, 65 transitions, 157 flow [2024-10-11 19:44:36,829 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=157, PETRI_PLACES=68, PETRI_TRANSITIONS=65} [2024-10-11 19:44:36,830 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, -7 predicate places. [2024-10-11 19:44:36,830 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 65 transitions, 157 flow [2024-10-11 19:44:36,830 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.8) internal successors, (179), 5 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:44:36,830 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:44:36,830 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1] [2024-10-11 19:44:36,830 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 19:44:36,830 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-11 19:44:36,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:44:36,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1875778806, now seen corresponding path program 1 times [2024-10-11 19:44:36,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:44:36,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438906745] [2024-10-11 19:44:36,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:44:36,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:44:36,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:44:37,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:44:37,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:44:37,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438906745] [2024-10-11 19:44:37,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438906745] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:44:37,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526223537] [2024-10-11 19:44:37,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:44:37,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:44:37,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:44:37,116 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:44:37,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 19:44:37,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:44:37,200 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-11 19:44:37,204 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:44:37,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 19:44:37,270 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 [2024-10-11 19:44:37,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 19:44:37,331 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 [2024-10-11 19:44:37,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:44:37,364 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:44:37,492 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 19:44:37,493 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 [2024-10-11 19:44:37,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:44:37,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526223537] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:44:37,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:44:37,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2024-10-11 19:44:37,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176820529] [2024-10-11 19:44:37,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:44:37,654 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-11 19:44:37,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:44:37,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-11 19:44:37,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2024-10-11 19:44:38,611 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 75 [2024-10-11 19:44:38,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 65 transitions, 157 flow. Second operand has 15 states, 15 states have (on average 35.4) internal successors, (531), 15 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:44:38,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:44:38,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 75 [2024-10-11 19:44:38,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:44:39,351 INFO L124 PetriNetUnfolderBase]: 174/590 cut-off events. [2024-10-11 19:44:39,351 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-10-11 19:44:39,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 988 conditions, 590 events. 174/590 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3517 event pairs, 30 based on Foata normal form. 0/467 useless extension candidates. Maximal degree in co-relation 979. Up to 188 conditions per place. [2024-10-11 19:44:39,354 INFO L140 encePairwiseOnDemand]: 65/75 looper letters, 59 selfloop transitions, 11 changer transitions 0/99 dead transitions. [2024-10-11 19:44:39,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 99 transitions, 391 flow [2024-10-11 19:44:39,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-11 19:44:39,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-11 19:44:39,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 313 transitions. [2024-10-11 19:44:39,355 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5961904761904762 [2024-10-11 19:44:39,355 INFO L175 Difference]: Start difference. First operand has 68 places, 65 transitions, 157 flow. Second operand 7 states and 313 transitions. [2024-10-11 19:44:39,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 99 transitions, 391 flow [2024-10-11 19:44:39,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 99 transitions, 389 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 19:44:39,357 INFO L231 Difference]: Finished difference. Result has 75 places, 69 transitions, 213 flow [2024-10-11 19:44:39,357 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=213, PETRI_PLACES=75, PETRI_TRANSITIONS=69} [2024-10-11 19:44:39,358 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 0 predicate places. [2024-10-11 19:44:39,358 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 69 transitions, 213 flow [2024-10-11 19:44:39,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 35.4) internal successors, (531), 15 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:44:39,359 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:44:39,359 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-10-11 19:44:39,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-11 19:44:39,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:44:39,560 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-11 19:44:39,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:44:39,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1798540058, now seen corresponding path program 1 times [2024-10-11 19:44:39,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:44:39,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121371045] [2024-10-11 19:44:39,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:44:39,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:44:39,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:44:39,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 19:44:39,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:44:39,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121371045] [2024-10-11 19:44:39,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121371045] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:44:39,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:44:39,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:44:39,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131080468] [2024-10-11 19:44:39,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:44:39,600 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:44:39,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:44:39,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:44:39,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:44:39,608 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 75 [2024-10-11 19:44:39,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 69 transitions, 213 flow. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:44:39,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:44:39,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 75 [2024-10-11 19:44:39,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:44:39,744 INFO L124 PetriNetUnfolderBase]: 254/916 cut-off events. [2024-10-11 19:44:39,745 INFO L125 PetriNetUnfolderBase]: For 83/83 co-relation queries the response was YES. [2024-10-11 19:44:39,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1602 conditions, 916 events. 254/916 cut-off events. For 83/83 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 5553 event pairs, 153 based on Foata normal form. 10/745 useless extension candidates. Maximal degree in co-relation 1589. Up to 300 conditions per place. [2024-10-11 19:44:39,749 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 51 selfloop transitions, 6 changer transitions 0/89 dead transitions. [2024-10-11 19:44:39,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 89 transitions, 373 flow [2024-10-11 19:44:39,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:44:39,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:44:39,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 191 transitions. [2024-10-11 19:44:39,750 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.8488888888888889 [2024-10-11 19:44:39,750 INFO L175 Difference]: Start difference. First operand has 75 places, 69 transitions, 213 flow. Second operand 3 states and 191 transitions. [2024-10-11 19:44:39,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 89 transitions, 373 flow [2024-10-11 19:44:39,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 89 transitions, 367 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:44:39,753 INFO L231 Difference]: Finished difference. Result has 76 places, 70 transitions, 234 flow [2024-10-11 19:44:39,753 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=234, PETRI_PLACES=76, PETRI_TRANSITIONS=70} [2024-10-11 19:44:39,754 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 1 predicate places. [2024-10-11 19:44:39,754 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 70 transitions, 234 flow [2024-10-11 19:44:39,754 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:44:39,754 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:44:39,754 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:44:39,754 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-11 19:44:39,754 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-11 19:44:39,755 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:44:39,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1865425503, now seen corresponding path program 1 times [2024-10-11 19:44:39,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:44:39,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205707188] [2024-10-11 19:44:39,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:44:39,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:44:39,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:44:39,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-11 19:44:39,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:44:39,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205707188] [2024-10-11 19:44:39,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205707188] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:44:39,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:44:39,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:44:39,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737760674] [2024-10-11 19:44:39,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:44:39,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:44:39,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:44:39,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:44:39,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:44:39,860 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 75 [2024-10-11 19:44:39,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 70 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:44:39,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:44:39,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 75 [2024-10-11 19:44:39,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:44:40,051 INFO L124 PetriNetUnfolderBase]: 279/939 cut-off events. [2024-10-11 19:44:40,052 INFO L125 PetriNetUnfolderBase]: For 281/281 co-relation queries the response was YES. [2024-10-11 19:44:40,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1765 conditions, 939 events. 279/939 cut-off events. For 281/281 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 5564 event pairs, 176 based on Foata normal form. 0/804 useless extension candidates. Maximal degree in co-relation 1750. Up to 473 conditions per place. [2024-10-11 19:44:40,056 INFO L140 encePairwiseOnDemand]: 71/75 looper letters, 53 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2024-10-11 19:44:40,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 84 transitions, 405 flow [2024-10-11 19:44:40,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:44:40,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:44:40,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 174 transitions. [2024-10-11 19:44:40,057 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7733333333333333 [2024-10-11 19:44:40,058 INFO L175 Difference]: Start difference. First operand has 76 places, 70 transitions, 234 flow. Second operand 3 states and 174 transitions. [2024-10-11 19:44:40,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 84 transitions, 405 flow [2024-10-11 19:44:40,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 84 transitions, 395 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 19:44:40,060 INFO L231 Difference]: Finished difference. Result has 75 places, 68 transitions, 228 flow [2024-10-11 19:44:40,061 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=75, PETRI_TRANSITIONS=68} [2024-10-11 19:44:40,061 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 0 predicate places. [2024-10-11 19:44:40,061 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 68 transitions, 228 flow [2024-10-11 19:44:40,061 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:44:40,062 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:44:40,062 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:44:40,062 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-11 19:44:40,062 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-11 19:44:40,062 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:44:40,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1865425504, now seen corresponding path program 1 times [2024-10-11 19:44:40,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:44:40,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737148417] [2024-10-11 19:44:40,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:44:40,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:44:40,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:44:40,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:44:40,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:44:40,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737148417] [2024-10-11 19:44:40,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737148417] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:44:40,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655301219] [2024-10-11 19:44:40,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:44:40,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:44:40,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:44:40,147 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:44:40,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 19:44:40,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:44:40,237 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-11 19:44:40,238 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:44:40,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:44:40,268 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:44:40,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:44:40,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655301219] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:44:40,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:44:40,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-10-11 19:44:40,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214274577] [2024-10-11 19:44:40,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:44:40,324 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 19:44:40,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:44:40,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 19:44:40,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-10-11 19:44:40,388 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 75 [2024-10-11 19:44:40,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 68 transitions, 228 flow. Second operand has 9 states, 9 states have (on average 47.666666666666664) internal successors, (429), 9 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:44:40,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:44:40,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 75 [2024-10-11 19:44:40,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:44:41,122 INFO L124 PetriNetUnfolderBase]: 702/2330 cut-off events. [2024-10-11 19:44:41,123 INFO L125 PetriNetUnfolderBase]: For 334/334 co-relation queries the response was YES. [2024-10-11 19:44:41,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4218 conditions, 2330 events. 702/2330 cut-off events. For 334/334 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 13309 event pairs, 88 based on Foata normal form. 54/1992 useless extension candidates. Maximal degree in co-relation 4203. Up to 234 conditions per place. [2024-10-11 19:44:41,134 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 146 selfloop transitions, 16 changer transitions 0/191 dead transitions. [2024-10-11 19:44:41,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 191 transitions, 869 flow [2024-10-11 19:44:41,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 19:44:41,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 19:44:41,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 531 transitions. [2024-10-11 19:44:41,135 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.885 [2024-10-11 19:44:41,135 INFO L175 Difference]: Start difference. First operand has 75 places, 68 transitions, 228 flow. Second operand 8 states and 531 transitions. [2024-10-11 19:44:41,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 191 transitions, 869 flow [2024-10-11 19:44:41,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 191 transitions, 839 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-10-11 19:44:41,139 INFO L231 Difference]: Finished difference. Result has 86 places, 73 transitions, 330 flow [2024-10-11 19:44:41,140 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=330, PETRI_PLACES=86, PETRI_TRANSITIONS=73} [2024-10-11 19:44:41,140 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 11 predicate places. [2024-10-11 19:44:41,140 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 73 transitions, 330 flow [2024-10-11 19:44:41,141 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 47.666666666666664) internal successors, (429), 9 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:44:41,141 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:44:41,141 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 1, 1] [2024-10-11 19:44:41,154 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-11 19:44:41,341 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:44:41,342 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-11 19:44:41,342 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:44:41,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1326258334, now seen corresponding path program 2 times [2024-10-11 19:44:41,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:44:41,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289360896] [2024-10-11 19:44:41,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:44:41,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:44:41,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:44:41,969 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:44:41,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:44:41,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289360896] [2024-10-11 19:44:41,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289360896] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:44:41,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381102312] [2024-10-11 19:44:41,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 19:44:41,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:44:41,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:44:41,973 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:44:41,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 19:44:42,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 19:44:42,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:44:42,103 INFO L255 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-10-11 19:44:42,105 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:44:42,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 19:44:42,139 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 [2024-10-11 19:44:42,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 19:44:42,199 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 [2024-10-11 19:44:42,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 19:44:42,261 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 [2024-10-11 19:44:42,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 19:44:42,321 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 [2024-10-11 19:44:42,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 19:44:42,396 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 [2024-10-11 19:44:42,425 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:44:42,425 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:44:42,514 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 19:44:42,514 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 [2024-10-11 19:44:42,619 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 19:44:42,620 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 [2024-10-11 19:44:42,744 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 19:44:42,744 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 [2024-10-11 19:44:42,864 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 19:44:42,865 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 [2024-10-11 19:44:42,995 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:44:42,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381102312] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:44:42,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:44:42,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 31 [2024-10-11 19:44:42,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982573770] [2024-10-11 19:44:42,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:44:42,996 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-10-11 19:44:42,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:44:42,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-10-11 19:44:42,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=810, Unknown=0, NotChecked=0, Total=1056 [2024-10-11 19:44:46,879 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 75 [2024-10-11 19:44:46,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 73 transitions, 330 flow. Second operand has 33 states, 33 states have (on average 35.45454545454545) internal successors, (1170), 33 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:44:46,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:44:46,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 75 [2024-10-11 19:44:46,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:44:48,430 INFO L124 PetriNetUnfolderBase]: 806/2506 cut-off events. [2024-10-11 19:44:48,431 INFO L125 PetriNetUnfolderBase]: For 779/779 co-relation queries the response was YES. [2024-10-11 19:44:48,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4931 conditions, 2506 events. 806/2506 cut-off events. For 779/779 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 14534 event pairs, 0 based on Foata normal form. 6/2127 useless extension candidates. Maximal degree in co-relation 4909. Up to 855 conditions per place. [2024-10-11 19:44:48,444 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 95 selfloop transitions, 24 changer transitions 0/147 dead transitions. [2024-10-11 19:44:48,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 147 transitions, 890 flow [2024-10-11 19:44:48,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-11 19:44:48,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-11 19:44:48,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 562 transitions. [2024-10-11 19:44:48,446 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5764102564102564 [2024-10-11 19:44:48,446 INFO L175 Difference]: Start difference. First operand has 86 places, 73 transitions, 330 flow. Second operand 13 states and 562 transitions. [2024-10-11 19:44:48,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 147 transitions, 890 flow [2024-10-11 19:44:48,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 147 transitions, 872 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-10-11 19:44:48,452 INFO L231 Difference]: Finished difference. Result has 103 places, 82 transitions, 477 flow [2024-10-11 19:44:48,452 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=477, PETRI_PLACES=103, PETRI_TRANSITIONS=82} [2024-10-11 19:44:48,453 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 28 predicate places. [2024-10-11 19:44:48,454 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 82 transitions, 477 flow [2024-10-11 19:44:48,455 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 35.45454545454545) internal successors, (1170), 33 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:44:48,455 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:44:48,455 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:44:48,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 19:44:48,659 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:44:48,660 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-11 19:44:48,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:44:48,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1427000128, now seen corresponding path program 2 times [2024-10-11 19:44:48,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:44:48,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923200951] [2024-10-11 19:44:48,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:44:48,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:44:48,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:44:48,952 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:44:48,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:44:48,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923200951] [2024-10-11 19:44:48,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923200951] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:44:48,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785428183] [2024-10-11 19:44:48,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 19:44:48,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:44:48,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:44:48,955 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:44:48,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-11 19:44:49,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-11 19:44:49,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:44:49,070 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-11 19:44:49,071 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:44:49,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-11 19:44:49,085 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-10-11 19:44:49,085 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:44:49,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785428183] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:44:49,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 19:44:49,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 10 [2024-10-11 19:44:49,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543634008] [2024-10-11 19:44:49,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:44:49,086 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:44:49,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:44:49,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:44:49,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2024-10-11 19:44:49,125 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 75 [2024-10-11 19:44:49,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 82 transitions, 477 flow. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:44:49,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:44:49,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 75 [2024-10-11 19:44:49,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:44:49,390 INFO L124 PetriNetUnfolderBase]: 685/2352 cut-off events. [2024-10-11 19:44:49,390 INFO L125 PetriNetUnfolderBase]: For 1414/1414 co-relation queries the response was YES. [2024-10-11 19:44:49,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4724 conditions, 2352 events. 685/2352 cut-off events. For 1414/1414 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 13688 event pairs, 504 based on Foata normal form. 68/2061 useless extension candidates. Maximal degree in co-relation 4695. Up to 1260 conditions per place. [2024-10-11 19:44:49,401 INFO L140 encePairwiseOnDemand]: 71/75 looper letters, 71 selfloop transitions, 2 changer transitions 0/102 dead transitions. [2024-10-11 19:44:49,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 102 transitions, 775 flow [2024-10-11 19:44:49,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:44:49,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:44:49,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 176 transitions. [2024-10-11 19:44:49,402 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7822222222222223 [2024-10-11 19:44:49,402 INFO L175 Difference]: Start difference. First operand has 103 places, 82 transitions, 477 flow. Second operand 3 states and 176 transitions. [2024-10-11 19:44:49,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 102 transitions, 775 flow [2024-10-11 19:44:49,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 102 transitions, 737 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-10-11 19:44:49,407 INFO L231 Difference]: Finished difference. Result has 98 places, 80 transitions, 446 flow [2024-10-11 19:44:49,407 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=446, PETRI_PLACES=98, PETRI_TRANSITIONS=80} [2024-10-11 19:44:49,408 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 23 predicate places. [2024-10-11 19:44:49,409 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 80 transitions, 446 flow [2024-10-11 19:44:49,409 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:44:49,409 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:44:49,409 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:44:49,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-11 19:44:49,613 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-11 19:44:49,614 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-11 19:44:49,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:44:49,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1252566784, now seen corresponding path program 1 times [2024-10-11 19:44:49,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:44:49,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768230101] [2024-10-11 19:44:49,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:44:49,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:44:49,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:44:49,821 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:44:49,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:44:49,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768230101] [2024-10-11 19:44:49,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768230101] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:44:49,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823635386] [2024-10-11 19:44:49,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:44:49,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:44:49,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:44:49,824 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:44:49,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-11 19:44:49,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:44:49,993 INFO L255 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-11 19:44:49,994 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:44:50,022 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:44:50,022 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:44:50,091 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:44:50,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823635386] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:44:50,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:44:50,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2024-10-11 19:44:50,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870379850] [2024-10-11 19:44:50,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:44:50,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-11 19:44:50,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:44:50,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-11 19:44:50,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-10-11 19:44:50,133 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 75 [2024-10-11 19:44:50,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 80 transitions, 446 flow. Second operand has 13 states, 13 states have (on average 48.07692307692308) internal successors, (625), 13 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:44:50,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:44:50,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 75 [2024-10-11 19:44:50,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:44:50,900 INFO L124 PetriNetUnfolderBase]: 1142/3758 cut-off events. [2024-10-11 19:44:50,901 INFO L125 PetriNetUnfolderBase]: For 1996/1996 co-relation queries the response was YES. [2024-10-11 19:44:50,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7391 conditions, 3758 events. 1142/3758 cut-off events. For 1996/1996 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 21637 event pairs, 27 based on Foata normal form. 44/3194 useless extension candidates. Maximal degree in co-relation 7362. Up to 235 conditions per place. [2024-10-11 19:44:50,918 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 234 selfloop transitions, 25 changer transitions 0/286 dead transitions. [2024-10-11 19:44:50,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 286 transitions, 1551 flow [2024-10-11 19:44:50,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 19:44:50,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-11 19:44:50,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 806 transitions. [2024-10-11 19:44:50,921 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.8955555555555555 [2024-10-11 19:44:50,921 INFO L175 Difference]: Start difference. First operand has 98 places, 80 transitions, 446 flow. Second operand 12 states and 806 transitions. [2024-10-11 19:44:50,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 286 transitions, 1551 flow [2024-10-11 19:44:50,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 286 transitions, 1505 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-10-11 19:44:50,928 INFO L231 Difference]: Finished difference. Result has 112 places, 82 transitions, 558 flow [2024-10-11 19:44:50,928 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=558, PETRI_PLACES=112, PETRI_TRANSITIONS=82} [2024-10-11 19:44:50,928 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 37 predicate places. [2024-10-11 19:44:50,928 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 82 transitions, 558 flow [2024-10-11 19:44:50,929 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 48.07692307692308) internal successors, (625), 13 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:44:50,929 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:44:50,929 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 10, 1, 1] [2024-10-11 19:44:50,942 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-11 19:44:51,129 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-11 19:44:51,130 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-11 19:44:51,131 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:44:51,131 INFO L85 PathProgramCache]: Analyzing trace with hash 552051730, now seen corresponding path program 3 times [2024-10-11 19:44:51,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:44:51,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771194325] [2024-10-11 19:44:51,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:44:51,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:44:51,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:44:51,523 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 183 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:44:51,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:44:51,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771194325] [2024-10-11 19:44:51,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771194325] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:44:51,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653472098] [2024-10-11 19:44:51,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 19:44:51,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:44:51,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:44:51,529 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:44:51,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-11 19:45:30,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-10-11 19:45:30,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:45:31,011 INFO L255 TraceCheckSpWp]: Trace formula consists of 882 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-11 19:45:31,013 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:45:31,101 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:45:31,102 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:45:31,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653472098] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:45:31,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-11 19:45:31,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 13 [2024-10-11 19:45:31,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556017401] [2024-10-11 19:45:31,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:45:31,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-11 19:45:31,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:45:31,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-11 19:45:31,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2024-10-11 19:45:31,143 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 75 [2024-10-11 19:45:31,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 82 transitions, 558 flow. Second operand has 13 states, 13 states have (on average 47.53846153846154) internal successors, (618), 13 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:45:31,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:45:31,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 75 [2024-10-11 19:45:31,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:45:32,060 INFO L124 PetriNetUnfolderBase]: 1131/3742 cut-off events. [2024-10-11 19:45:32,061 INFO L125 PetriNetUnfolderBase]: For 2200/2200 co-relation queries the response was YES. [2024-10-11 19:45:32,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7354 conditions, 3742 events. 1131/3742 cut-off events. For 2200/2200 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 21437 event pairs, 18 based on Foata normal form. 11/3145 useless extension candidates. Maximal degree in co-relation 7319. Up to 228 conditions per place. [2024-10-11 19:45:32,080 INFO L140 encePairwiseOnDemand]: 68/75 looper letters, 242 selfloop transitions, 23 changer transitions 1/292 dead transitions. [2024-10-11 19:45:32,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 292 transitions, 1589 flow [2024-10-11 19:45:32,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-11 19:45:32,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-11 19:45:32,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 853 transitions. [2024-10-11 19:45:32,084 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.8748717948717949 [2024-10-11 19:45:32,084 INFO L175 Difference]: Start difference. First operand has 112 places, 82 transitions, 558 flow. Second operand 13 states and 853 transitions. [2024-10-11 19:45:32,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 292 transitions, 1589 flow [2024-10-11 19:45:32,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 292 transitions, 1487 flow, removed 0 selfloop flow, removed 15 redundant places. [2024-10-11 19:45:32,092 INFO L231 Difference]: Finished difference. Result has 108 places, 78 transitions, 471 flow [2024-10-11 19:45:32,092 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=471, PETRI_PLACES=108, PETRI_TRANSITIONS=78} [2024-10-11 19:45:32,093 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 33 predicate places. [2024-10-11 19:45:32,093 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 78 transitions, 471 flow [2024-10-11 19:45:32,093 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 47.53846153846154) internal successors, (618), 13 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:45:32,093 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:45:32,093 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:45:32,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-11 19:45:32,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-11 19:45:32,296 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-11 19:45:32,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:45:32,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1231181792, now seen corresponding path program 2 times [2024-10-11 19:45:32,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:45:32,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548005769] [2024-10-11 19:45:32,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:45:32,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:45:32,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:45:32,846 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 144 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:45:32,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:45:32,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548005769] [2024-10-11 19:45:32,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548005769] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:45:32,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185968787] [2024-10-11 19:45:32,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 19:45:32,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:45:32,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:45:32,848 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:45:32,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-11 19:45:33,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 19:45:33,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:45:33,078 INFO L255 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-11 19:45:33,080 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:45:33,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 19:45:33,320 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 16 treesize of output 11 [2024-10-11 19:45:33,326 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-11 19:45:33,326 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 [2024-10-11 19:45:33,350 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 180 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:45:33,351 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:45:33,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-10-11 19:45:33,508 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 19:45:33,508 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 46 treesize of output 64 [2024-10-11 19:45:33,760 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 180 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:45:33,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185968787] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:45:33,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:45:33,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 39 [2024-10-11 19:45:33,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61835942] [2024-10-11 19:45:33,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:45:33,762 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-10-11 19:45:33,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:45:33,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-10-11 19:45:33,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=1187, Unknown=0, NotChecked=0, Total=1640 [2024-10-11 19:45:35,138 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 75 [2024-10-11 19:45:35,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 78 transitions, 471 flow. Second operand has 41 states, 41 states have (on average 40.73170731707317) internal successors, (1670), 41 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:45:35,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:45:35,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 75 [2024-10-11 19:45:35,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:45:38,537 INFO L124 PetriNetUnfolderBase]: 2713/8822 cut-off events. [2024-10-11 19:45:38,537 INFO L125 PetriNetUnfolderBase]: For 4171/4171 co-relation queries the response was YES. [2024-10-11 19:45:38,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16572 conditions, 8822 events. 2713/8822 cut-off events. For 4171/4171 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 65698 event pairs, 98 based on Foata normal form. 114/7394 useless extension candidates. Maximal degree in co-relation 16546. Up to 342 conditions per place. [2024-10-11 19:45:38,570 INFO L140 encePairwiseOnDemand]: 63/75 looper letters, 627 selfloop transitions, 120 changer transitions 2/775 dead transitions. [2024-10-11 19:45:38,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 775 transitions, 3881 flow [2024-10-11 19:45:38,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-10-11 19:45:38,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2024-10-11 19:45:38,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2530 transitions. [2024-10-11 19:45:38,578 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7333333333333333 [2024-10-11 19:45:38,578 INFO L175 Difference]: Start difference. First operand has 108 places, 78 transitions, 471 flow. Second operand 46 states and 2530 transitions. [2024-10-11 19:45:38,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 775 transitions, 3881 flow [2024-10-11 19:45:38,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 775 transitions, 3763 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-10-11 19:45:38,589 INFO L231 Difference]: Finished difference. Result has 185 places, 175 transitions, 1455 flow [2024-10-11 19:45:38,590 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=1455, PETRI_PLACES=185, PETRI_TRANSITIONS=175} [2024-10-11 19:45:38,590 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 110 predicate places. [2024-10-11 19:45:38,590 INFO L471 AbstractCegarLoop]: Abstraction has has 185 places, 175 transitions, 1455 flow [2024-10-11 19:45:38,591 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 40.73170731707317) internal successors, (1670), 41 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:45:38,591 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:45:38,591 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:45:38,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-11 19:45:38,795 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:45:38,796 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-11 19:45:38,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:45:38,796 INFO L85 PathProgramCache]: Analyzing trace with hash 605194161, now seen corresponding path program 1 times [2024-10-11 19:45:38,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:45:38,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260508220] [2024-10-11 19:45:38,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:45:38,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:45:38,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:45:39,410 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 144 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:45:39,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:45:39,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260508220] [2024-10-11 19:45:39,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260508220] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:45:39,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46000771] [2024-10-11 19:45:39,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:45:39,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:45:39,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:45:39,414 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:45:39,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-11 19:45:39,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:45:39,668 INFO L255 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-11 19:45:39,671 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:45:39,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 19:45:39,854 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 16 treesize of output 11 [2024-10-11 19:45:39,859 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-11 19:45:39,860 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 [2024-10-11 19:45:39,869 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 180 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:45:39,869 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:45:40,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-10-11 19:45:40,037 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 19:45:40,038 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 46 treesize of output 64 [2024-10-11 19:45:40,288 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 180 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:45:40,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46000771] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:45:40,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:45:40,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 27 [2024-10-11 19:45:40,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215413494] [2024-10-11 19:45:40,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:45:40,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-10-11 19:45:40,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:45:40,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-10-11 19:45:40,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=534, Unknown=0, NotChecked=0, Total=812 [2024-10-11 19:45:41,531 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 75 [2024-10-11 19:45:41,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 175 transitions, 1455 flow. Second operand has 29 states, 29 states have (on average 36.758620689655174) internal successors, (1066), 29 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:45:41,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:45:41,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 75 [2024-10-11 19:45:41,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:45:44,381 INFO L124 PetriNetUnfolderBase]: 2784/8807 cut-off events. [2024-10-11 19:45:44,382 INFO L125 PetriNetUnfolderBase]: For 72140/72251 co-relation queries the response was YES. [2024-10-11 19:45:44,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29300 conditions, 8807 events. 2784/8807 cut-off events. For 72140/72251 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 65077 event pairs, 318 based on Foata normal form. 46/7399 useless extension candidates. Maximal degree in co-relation 29230. Up to 671 conditions per place. [2024-10-11 19:45:44,480 INFO L140 encePairwiseOnDemand]: 64/75 looper letters, 425 selfloop transitions, 83 changer transitions 1/535 dead transitions. [2024-10-11 19:45:44,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 535 transitions, 5323 flow [2024-10-11 19:45:44,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-11 19:45:44,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-11 19:45:44,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1104 transitions. [2024-10-11 19:45:44,482 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6690909090909091 [2024-10-11 19:45:44,482 INFO L175 Difference]: Start difference. First operand has 185 places, 175 transitions, 1455 flow. Second operand 22 states and 1104 transitions. [2024-10-11 19:45:44,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 535 transitions, 5323 flow [2024-10-11 19:45:44,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 535 transitions, 5232 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-10-11 19:45:44,555 INFO L231 Difference]: Finished difference. Result has 198 places, 200 transitions, 1668 flow [2024-10-11 19:45:44,556 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=1364, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1668, PETRI_PLACES=198, PETRI_TRANSITIONS=200} [2024-10-11 19:45:44,557 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 123 predicate places. [2024-10-11 19:45:44,557 INFO L471 AbstractCegarLoop]: Abstraction has has 198 places, 200 transitions, 1668 flow [2024-10-11 19:45:44,558 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 36.758620689655174) internal successors, (1066), 29 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:45:44,558 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:45:44,558 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:45:44,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-11 19:45:44,759 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-11 19:45:44,760 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-10-11 19:45:44,760 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:45:44,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1581150231, now seen corresponding path program 1 times [2024-10-11 19:45:44,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:45:44,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058907185] [2024-10-11 19:45:44,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:45:44,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:45:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:45:48,234 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 96 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:45:48,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:45:48,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058907185] [2024-10-11 19:45:48,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058907185] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:45:48,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027818039] [2024-10-11 19:45:48,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:45:48,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:45:48,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:45:48,240 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:45:48,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-11 19:45:48,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:45:48,546 INFO L255 TraceCheckSpWp]: Trace formula consists of 927 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-10-11 19:45:48,552 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:45:48,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-11 19:45:48,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-10-11 19:45:48,654 INFO L349 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2024-10-11 19:45:48,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 24 [2024-10-11 19:45:48,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 19:45:48,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 29 treesize of output 13 [2024-10-11 19:45:48,703 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-10-11 19:45:48,703 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 16 treesize of output 18 [2024-10-11 19:45:48,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 19:45:48,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 29 treesize of output 13 [2024-10-11 19:45:48,766 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-10-11 19:45:48,766 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 16 treesize of output 18 [2024-10-11 19:45:48,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 19:45:48,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 29 treesize of output 13 [2024-10-11 19:45:48,832 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-10-11 19:45:48,832 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 16 treesize of output 18 [2024-10-11 19:45:48,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 19:45:48,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 29 treesize of output 13 [2024-10-11 19:45:48,899 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-10-11 19:45:48,899 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 16 treesize of output 18 [2024-10-11 19:45:48,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 19:45:48,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 29 treesize of output 13 [2024-10-11 19:45:48,970 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-10-11 19:45:48,970 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 16 treesize of output 18 [2024-10-11 19:45:49,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 19:45:49,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 29 treesize of output 13 [2024-10-11 19:45:49,042 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-10-11 19:45:49,043 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 16 treesize of output 18 [2024-10-11 19:45:49,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 19:45:49,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 29 treesize of output 13 [2024-10-11 19:45:49,116 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-10-11 19:45:49,117 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 16 treesize of output 18 [2024-10-11 19:45:49,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 19:45:49,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 29 treesize of output 13 [2024-10-11 19:45:49,193 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-10-11 19:45:49,194 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 16 treesize of output 18 [2024-10-11 19:45:49,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 19:45:49,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 29 treesize of output 13 [2024-10-11 19:45:49,292 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-10-11 19:45:49,293 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 16 treesize of output 18 [2024-10-11 19:45:49,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-10-11 19:45:49,333 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 144 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:45:49,333 INFO L311 TraceCheckSpWp]: Computing backward predicates...