./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_12-arraycollapse_rc.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_12-arraycollapse_rc.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 034172cc4904075fab6f792587170b7236be9fb41f3a62fa7fbe9a216ec4ca2c --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 19:08:20,443 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 19:08:20,518 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-24 19:08:20,524 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 19:08:20,525 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 19:08:20,554 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 19:08:20,555 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 19:08:20,555 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 19:08:20,556 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 19:08:20,556 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 19:08:20,557 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 19:08:20,558 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 19:08:20,558 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 19:08:20,559 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 19:08:20,560 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 19:08:20,561 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 19:08:20,561 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 19:08:20,561 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 19:08:20,561 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 19:08:20,562 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 19:08:20,562 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-24 19:08:20,562 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-24 19:08:20,563 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-24 19:08:20,563 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 19:08:20,565 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-24 19:08:20,566 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 19:08:20,566 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 19:08:20,566 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 19:08:20,566 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 19:08:20,567 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 19:08:20,567 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 19:08:20,567 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 19:08:20,567 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 19:08:20,567 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:08:20,567 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 19:08:20,568 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 19:08:20,568 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 19:08:20,568 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 19:08:20,568 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 19:08:20,569 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 19:08:20,569 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 19:08:20,570 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 19:08:20,570 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 034172cc4904075fab6f792587170b7236be9fb41f3a62fa7fbe9a216ec4ca2c [2024-10-24 19:08:20,805 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 19:08:20,830 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 19:08:20,833 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 19:08:20,834 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 19:08:20,835 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 19:08:20,836 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_12-arraycollapse_rc.i [2024-10-24 19:08:22,291 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 19:08:22,535 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 19:08:22,536 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_12-arraycollapse_rc.i [2024-10-24 19:08:22,553 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5556535ee/73814a42879a4541a8ec28e22463286e/FLAG659eb9c2f [2024-10-24 19:08:22,570 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5556535ee/73814a42879a4541a8ec28e22463286e [2024-10-24 19:08:22,573 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 19:08:22,575 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 19:08:22,576 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 19:08:22,577 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 19:08:22,583 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 19:08:22,584 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:08:22" (1/1) ... [2024-10-24 19:08:22,588 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6771daa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:08:22, skipping insertion in model container [2024-10-24 19:08:22,589 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:08:22" (1/1) ... [2024-10-24 19:08:22,644 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 19:08:23,162 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:08:23,181 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 19:08:23,285 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:08:23,398 INFO L204 MainTranslator]: Completed translation [2024-10-24 19:08:23,399 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:08:23 WrapperNode [2024-10-24 19:08:23,399 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 19:08:23,400 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 19:08:23,400 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 19:08:23,401 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 19:08:23,407 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:08:23" (1/1) ... [2024-10-24 19:08:23,438 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:08:23" (1/1) ... [2024-10-24 19:08:23,474 INFO L138 Inliner]: procedures = 370, calls = 34, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 160 [2024-10-24 19:08:23,477 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 19:08:23,478 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 19:08:23,479 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 19:08:23,479 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 19:08:23,489 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:08:23" (1/1) ... [2024-10-24 19:08:23,490 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:08:23" (1/1) ... [2024-10-24 19:08:23,498 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:08:23" (1/1) ... [2024-10-24 19:08:23,540 INFO L175 MemorySlicer]: Split 30 memory accesses to 3 slices as follows [1, 22, 7]. 73 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0, 0]. The 19 writes are split as follows [1, 16, 2]. [2024-10-24 19:08:23,540 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:08:23" (1/1) ... [2024-10-24 19:08:23,541 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:08:23" (1/1) ... [2024-10-24 19:08:23,554 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:08:23" (1/1) ... [2024-10-24 19:08:23,566 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:08:23" (1/1) ... [2024-10-24 19:08:23,568 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:08:23" (1/1) ... [2024-10-24 19:08:23,570 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:08:23" (1/1) ... [2024-10-24 19:08:23,573 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 19:08:23,574 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 19:08:23,574 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 19:08:23,574 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 19:08:23,575 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:08:23" (1/1) ... [2024-10-24 19:08:23,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:08:23,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:08:23,617 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-24 19:08:23,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-24 19:08:23,667 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-10-24 19:08:23,667 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-10-24 19:08:23,667 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-10-24 19:08:23,668 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-24 19:08:23,668 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-24 19:08:23,668 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-24 19:08:23,668 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-24 19:08:23,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-24 19:08:23,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-24 19:08:23,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-24 19:08:23,669 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-24 19:08:23,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-24 19:08:23,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 19:08:23,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-10-24 19:08:23,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-10-24 19:08:23,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-10-24 19:08:23,670 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-10-24 19:08:23,671 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-10-24 19:08:23,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 19:08:23,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 19:08:23,672 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-24 19:08:23,845 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 19:08:23,848 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 19:08:24,270 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-24 19:08:24,270 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 19:08:24,490 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 19:08:24,491 INFO L314 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-24 19:08:24,492 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 07:08:24 BoogieIcfgContainer [2024-10-24 19:08:24,492 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 19:08:24,493 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 19:08:24,494 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 19:08:24,497 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 19:08:24,497 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 07:08:22" (1/3) ... [2024-10-24 19:08:24,498 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@636c3f5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 07:08:24, skipping insertion in model container [2024-10-24 19:08:24,498 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:08:23" (2/3) ... [2024-10-24 19:08:24,498 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@636c3f5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 07:08:24, skipping insertion in model container [2024-10-24 19:08:24,499 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 07:08:24" (3/3) ... [2024-10-24 19:08:24,501 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_12-arraycollapse_rc.i [2024-10-24 19:08:24,517 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 19:08:24,517 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 57 error locations. [2024-10-24 19:08:24,517 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-24 19:08:24,577 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-24 19:08:24,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 101 transitions, 206 flow [2024-10-24 19:08:24,668 INFO L124 PetriNetUnfolderBase]: 1/100 cut-off events. [2024-10-24 19:08:24,668 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 19:08:24,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 100 events. 1/100 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 324 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2024-10-24 19:08:24,671 INFO L82 GeneralOperation]: Start removeDead. Operand has 104 places, 101 transitions, 206 flow [2024-10-24 19:08:24,675 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 100 transitions, 203 flow [2024-10-24 19:08:24,686 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 19:08:24,694 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;@5a40cf11, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 19:08:24,694 INFO L334 AbstractCegarLoop]: Starting to check reachability of 70 error locations. [2024-10-24 19:08:24,697 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 19:08:24,697 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-24 19:08:24,697 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 19:08:24,698 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:08:24,698 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-24 19:08:24,699 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-10-24 19:08:24,707 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:08:24,708 INFO L85 PathProgramCache]: Analyzing trace with hash 509857, now seen corresponding path program 1 times [2024-10-24 19:08:24,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:08:24,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886442921] [2024-10-24 19:08:24,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:08:24,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:08:24,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:08:25,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:08:25,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:08:25,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886442921] [2024-10-24 19:08:25,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886442921] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:08:25,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:08:25,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:08:25,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686619352] [2024-10-24 19:08:25,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:08:25,027 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:08:25,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:08:25,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:08:25,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:08:25,177 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 101 [2024-10-24 19:08:25,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 100 transitions, 203 flow. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:08:25,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:08:25,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 101 [2024-10-24 19:08:25,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:08:25,357 INFO L124 PetriNetUnfolderBase]: 64/290 cut-off events. [2024-10-24 19:08:25,360 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 19:08:25,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 457 conditions, 290 events. 64/290 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1348 event pairs, 63 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 377. Up to 157 conditions per place. [2024-10-24 19:08:25,367 INFO L140 encePairwiseOnDemand]: 89/101 looper letters, 30 selfloop transitions, 6 changer transitions 0/94 dead transitions. [2024-10-24 19:08:25,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 94 transitions, 263 flow [2024-10-24 19:08:25,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:08:25,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:08:25,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 219 transitions. [2024-10-24 19:08:25,383 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7227722772277227 [2024-10-24 19:08:25,385 INFO L175 Difference]: Start difference. First operand has 103 places, 100 transitions, 203 flow. Second operand 3 states and 219 transitions. [2024-10-24 19:08:25,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 94 transitions, 263 flow [2024-10-24 19:08:25,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 94 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 19:08:25,393 INFO L231 Difference]: Finished difference. Result has 98 places, 94 transitions, 202 flow [2024-10-24 19:08:25,395 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=98, PETRI_TRANSITIONS=94} [2024-10-24 19:08:25,398 INFO L277 CegarLoopForPetriNet]: 103 programPoint places, -5 predicate places. [2024-10-24 19:08:25,399 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 94 transitions, 202 flow [2024-10-24 19:08:25,399 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:08:25,399 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:08:25,399 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-24 19:08:25,399 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 19:08:25,400 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-10-24 19:08:25,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:08:25,400 INFO L85 PathProgramCache]: Analyzing trace with hash 509858, now seen corresponding path program 1 times [2024-10-24 19:08:25,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:08:25,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382533081] [2024-10-24 19:08:25,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:08:25,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:08:25,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:08:25,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:08:25,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:08:25,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382533081] [2024-10-24 19:08:25,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382533081] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:08:25,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:08:25,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:08:25,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635181037] [2024-10-24 19:08:25,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:08:25,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:08:25,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:08:25,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:08:25,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:08:25,636 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 101 [2024-10-24 19:08:25,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 94 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:08:25,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:08:25,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 101 [2024-10-24 19:08:25,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:08:25,771 INFO L124 PetriNetUnfolderBase]: 64/284 cut-off events. [2024-10-24 19:08:25,773 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-24 19:08:25,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 454 conditions, 284 events. 64/284 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1317 event pairs, 63 based on Foata normal form. 6/224 useless extension candidates. Maximal degree in co-relation 411. Up to 157 conditions per place. [2024-10-24 19:08:25,776 INFO L140 encePairwiseOnDemand]: 89/101 looper letters, 27 selfloop transitions, 6 changer transitions 0/88 dead transitions. [2024-10-24 19:08:25,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 88 transitions, 256 flow [2024-10-24 19:08:25,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:08:25,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:08:25,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 225 transitions. [2024-10-24 19:08:25,780 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7425742574257426 [2024-10-24 19:08:25,781 INFO L175 Difference]: Start difference. First operand has 98 places, 94 transitions, 202 flow. Second operand 3 states and 225 transitions. [2024-10-24 19:08:25,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 88 transitions, 256 flow [2024-10-24 19:08:25,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 88 transitions, 244 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:08:25,785 INFO L231 Difference]: Finished difference. Result has 92 places, 88 transitions, 190 flow [2024-10-24 19:08:25,785 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=92, PETRI_TRANSITIONS=88} [2024-10-24 19:08:25,785 INFO L277 CegarLoopForPetriNet]: 103 programPoint places, -11 predicate places. [2024-10-24 19:08:25,786 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 88 transitions, 190 flow [2024-10-24 19:08:25,786 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:08:25,786 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:08:25,787 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-24 19:08:25,787 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-24 19:08:25,787 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-10-24 19:08:25,788 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:08:25,789 INFO L85 PathProgramCache]: Analyzing trace with hash 489988584, now seen corresponding path program 1 times [2024-10-24 19:08:25,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:08:25,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938706420] [2024-10-24 19:08:25,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:08:25,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:08:25,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:08:26,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:08:26,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:08:26,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938706420] [2024-10-24 19:08:26,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938706420] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:08:26,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:08:26,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 19:08:26,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677620419] [2024-10-24 19:08:26,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:08:26,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 19:08:26,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:08:26,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 19:08:26,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-24 19:08:26,303 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 101 [2024-10-24 19:08:26,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 88 transitions, 190 flow. Second operand has 5 states, 5 states have (on average 54.8) internal successors, (274), 5 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:08:26,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:08:26,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 101 [2024-10-24 19:08:26,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:08:26,506 INFO L124 PetriNetUnfolderBase]: 81/343 cut-off events. [2024-10-24 19:08:26,506 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-10-24 19:08:26,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 566 conditions, 343 events. 81/343 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1638 event pairs, 80 based on Foata normal form. 1/263 useless extension candidates. Maximal degree in co-relation 492. Up to 202 conditions per place. [2024-10-24 19:08:26,509 INFO L140 encePairwiseOnDemand]: 90/101 looper letters, 42 selfloop transitions, 6 changer transitions 0/95 dead transitions. [2024-10-24 19:08:26,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 95 transitions, 308 flow [2024-10-24 19:08:26,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:08:26,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:08:26,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 269 transitions. [2024-10-24 19:08:26,512 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6658415841584159 [2024-10-24 19:08:26,512 INFO L175 Difference]: Start difference. First operand has 92 places, 88 transitions, 190 flow. Second operand 4 states and 269 transitions. [2024-10-24 19:08:26,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 95 transitions, 308 flow [2024-10-24 19:08:26,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 95 transitions, 288 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:08:26,517 INFO L231 Difference]: Finished difference. Result has 95 places, 93 transitions, 230 flow [2024-10-24 19:08:26,517 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=230, PETRI_PLACES=95, PETRI_TRANSITIONS=93} [2024-10-24 19:08:26,518 INFO L277 CegarLoopForPetriNet]: 103 programPoint places, -8 predicate places. [2024-10-24 19:08:26,518 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 93 transitions, 230 flow [2024-10-24 19:08:26,518 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 54.8) internal successors, (274), 5 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:08:26,519 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:08:26,519 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:08:26,519 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-24 19:08:26,519 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-10-24 19:08:26,520 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:08:26,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1303447360, now seen corresponding path program 1 times [2024-10-24 19:08:26,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:08:26,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170558927] [2024-10-24 19:08:26,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:08:26,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:08:26,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:08:26,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:08:26,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:08:26,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170558927] [2024-10-24 19:08:26,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170558927] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:08:26,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:08:26,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-24 19:08:26,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904489883] [2024-10-24 19:08:26,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:08:26,787 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 19:08:26,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:08:26,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 19:08:26,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-24 19:08:27,161 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 101 [2024-10-24 19:08:27,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 93 transitions, 230 flow. Second operand has 7 states, 7 states have (on average 51.285714285714285) internal successors, (359), 7 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:08:27,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:08:27,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 101 [2024-10-24 19:08:27,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:08:27,364 INFO L124 PetriNetUnfolderBase]: 64/294 cut-off events. [2024-10-24 19:08:27,364 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-24 19:08:27,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 499 conditions, 294 events. 64/294 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1298 event pairs, 63 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 457. Up to 154 conditions per place. [2024-10-24 19:08:27,368 INFO L140 encePairwiseOnDemand]: 85/101 looper letters, 29 selfloop transitions, 17 changer transitions 0/89 dead transitions. [2024-10-24 19:08:27,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 89 transitions, 314 flow [2024-10-24 19:08:27,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 19:08:27,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-24 19:08:27,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 445 transitions. [2024-10-24 19:08:27,374 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5507425742574258 [2024-10-24 19:08:27,374 INFO L175 Difference]: Start difference. First operand has 95 places, 93 transitions, 230 flow. Second operand 8 states and 445 transitions. [2024-10-24 19:08:27,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 89 transitions, 314 flow [2024-10-24 19:08:27,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 89 transitions, 312 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 19:08:27,378 INFO L231 Difference]: Finished difference. Result has 97 places, 89 transitions, 254 flow [2024-10-24 19:08:27,378 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=254, PETRI_PLACES=97, PETRI_TRANSITIONS=89} [2024-10-24 19:08:27,379 INFO L277 CegarLoopForPetriNet]: 103 programPoint places, -6 predicate places. [2024-10-24 19:08:27,380 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 89 transitions, 254 flow [2024-10-24 19:08:27,380 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 51.285714285714285) internal successors, (359), 7 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:08:27,380 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:08:27,380 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:08:27,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-24 19:08:27,381 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-10-24 19:08:27,381 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:08:27,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1303447361, now seen corresponding path program 1 times [2024-10-24 19:08:27,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:08:27,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788982776] [2024-10-24 19:08:27,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:08:27,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:08:27,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:08:27,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:08:27,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:08:27,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788982776] [2024-10-24 19:08:27,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788982776] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:08:27,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:08:27,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-24 19:08:27,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65244282] [2024-10-24 19:08:27,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:08:27,723 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 19:08:27,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:08:27,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 19:08:27,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-24 19:08:28,234 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 101 [2024-10-24 19:08:28,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 89 transitions, 254 flow. Second operand has 7 states, 7 states have (on average 48.285714285714285) internal successors, (338), 7 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:08:28,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:08:28,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 101 [2024-10-24 19:08:28,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:08:28,445 INFO L124 PetriNetUnfolderBase]: 64/290 cut-off events. [2024-10-24 19:08:28,445 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-10-24 19:08:28,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 510 conditions, 290 events. 64/290 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1289 event pairs, 63 based on Foata normal form. 2/234 useless extension candidates. Maximal degree in co-relation 444. Up to 158 conditions per place. [2024-10-24 19:08:28,448 INFO L140 encePairwiseOnDemand]: 91/101 looper letters, 32 selfloop transitions, 13 changer transitions 0/87 dead transitions. [2024-10-24 19:08:28,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 87 transitions, 340 flow [2024-10-24 19:08:28,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-24 19:08:28,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-24 19:08:28,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 371 transitions. [2024-10-24 19:08:28,451 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5247524752475248 [2024-10-24 19:08:28,451 INFO L175 Difference]: Start difference. First operand has 97 places, 89 transitions, 254 flow. Second operand 7 states and 371 transitions. [2024-10-24 19:08:28,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 87 transitions, 340 flow [2024-10-24 19:08:28,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 87 transitions, 306 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-10-24 19:08:28,454 INFO L231 Difference]: Finished difference. Result has 94 places, 87 transitions, 242 flow [2024-10-24 19:08:28,454 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=242, PETRI_PLACES=94, PETRI_TRANSITIONS=87} [2024-10-24 19:08:28,455 INFO L277 CegarLoopForPetriNet]: 103 programPoint places, -9 predicate places. [2024-10-24 19:08:28,455 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 87 transitions, 242 flow [2024-10-24 19:08:28,455 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 48.285714285714285) internal successors, (338), 7 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:08:28,456 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:08:28,456 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:08:28,456 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-24 19:08:28,456 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-10-24 19:08:28,456 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:08:28,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1517519755, now seen corresponding path program 1 times [2024-10-24 19:08:28,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:08:28,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100070158] [2024-10-24 19:08:28,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:08:28,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:08:28,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:08:28,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:08:28,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:08:28,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100070158] [2024-10-24 19:08:28,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100070158] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:08:28,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:08:28,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 19:08:28,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148822198] [2024-10-24 19:08:28,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:08:28,588 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 19:08:28,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:08:28,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 19:08:28,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 19:08:28,728 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 101 [2024-10-24 19:08:28,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 87 transitions, 242 flow. Second operand has 5 states, 5 states have (on average 58.0) internal successors, (290), 5 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:08:28,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:08:28,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 101 [2024-10-24 19:08:28,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:08:28,850 INFO L124 PetriNetUnfolderBase]: 64/288 cut-off events. [2024-10-24 19:08:28,851 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-10-24 19:08:28,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 502 conditions, 288 events. 64/288 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1268 event pairs, 63 based on Foata normal form. 2/230 useless extension candidates. Maximal degree in co-relation 437. Up to 158 conditions per place. [2024-10-24 19:08:28,852 INFO L140 encePairwiseOnDemand]: 92/101 looper letters, 30 selfloop transitions, 13 changer transitions 0/86 dead transitions. [2024-10-24 19:08:28,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 86 transitions, 326 flow [2024-10-24 19:08:28,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 19:08:28,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 19:08:28,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 319 transitions. [2024-10-24 19:08:28,854 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6316831683168317 [2024-10-24 19:08:28,854 INFO L175 Difference]: Start difference. First operand has 94 places, 87 transitions, 242 flow. Second operand 5 states and 319 transitions. [2024-10-24 19:08:28,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 86 transitions, 326 flow [2024-10-24 19:08:28,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 86 transitions, 300 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-24 19:08:28,857 INFO L231 Difference]: Finished difference. Result has 91 places, 86 transitions, 240 flow [2024-10-24 19:08:28,857 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=240, PETRI_PLACES=91, PETRI_TRANSITIONS=86} [2024-10-24 19:08:28,857 INFO L277 CegarLoopForPetriNet]: 103 programPoint places, -12 predicate places. [2024-10-24 19:08:28,858 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 86 transitions, 240 flow [2024-10-24 19:08:28,858 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 58.0) internal successors, (290), 5 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:08:28,858 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:08:28,858 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:08:28,858 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-24 19:08:28,858 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-10-24 19:08:28,859 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:08:28,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1517519754, now seen corresponding path program 1 times [2024-10-24 19:08:28,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:08:28,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823286842] [2024-10-24 19:08:28,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:08:28,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:08:28,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:08:29,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:08:29,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:08:29,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823286842] [2024-10-24 19:08:29,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823286842] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:08:29,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:08:29,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 19:08:29,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278230345] [2024-10-24 19:08:29,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:08:29,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 19:08:29,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:08:29,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 19:08:29,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 19:08:29,242 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 101 [2024-10-24 19:08:29,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 86 transitions, 240 flow. Second operand has 5 states, 5 states have (on average 60.6) internal successors, (303), 5 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:08:29,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:08:29,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 101 [2024-10-24 19:08:29,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:08:29,380 INFO L124 PetriNetUnfolderBase]: 64/286 cut-off events. [2024-10-24 19:08:29,381 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-10-24 19:08:29,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 495 conditions, 286 events. 64/286 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1262 event pairs, 63 based on Foata normal form. 2/228 useless extension candidates. Maximal degree in co-relation 434. Up to 158 conditions per place. [2024-10-24 19:08:29,383 INFO L140 encePairwiseOnDemand]: 92/101 looper letters, 27 selfloop transitions, 13 changer transitions 0/85 dead transitions. [2024-10-24 19:08:29,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 85 transitions, 318 flow [2024-10-24 19:08:29,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 19:08:29,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 19:08:29,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 331 transitions. [2024-10-24 19:08:29,384 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6554455445544555 [2024-10-24 19:08:29,384 INFO L175 Difference]: Start difference. First operand has 91 places, 86 transitions, 240 flow. Second operand 5 states and 331 transitions. [2024-10-24 19:08:29,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 85 transitions, 318 flow [2024-10-24 19:08:29,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 85 transitions, 292 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-24 19:08:29,387 INFO L231 Difference]: Finished difference. Result has 90 places, 85 transitions, 238 flow [2024-10-24 19:08:29,387 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=238, PETRI_PLACES=90, PETRI_TRANSITIONS=85} [2024-10-24 19:08:29,388 INFO L277 CegarLoopForPetriNet]: 103 programPoint places, -13 predicate places. [2024-10-24 19:08:29,388 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 85 transitions, 238 flow [2024-10-24 19:08:29,388 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 60.6) internal successors, (303), 5 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:08:29,389 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:08:29,389 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:08:29,389 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-24 19:08:29,389 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-10-24 19:08:29,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:08:29,390 INFO L85 PathProgramCache]: Analyzing trace with hash -631848356, now seen corresponding path program 1 times [2024-10-24 19:08:29,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:08:29,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667594527] [2024-10-24 19:08:29,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:08:29,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:08:29,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:08:29,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:08:29,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:08:29,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667594527] [2024-10-24 19:08:29,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667594527] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 19:08:29,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644228064] [2024-10-24 19:08:29,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:08:29,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:08:29,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:08:29,738 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 19:08:29,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 19:08:29,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:08:29,887 INFO L255 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-10-24 19:08:29,895 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:08:29,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:08:29,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-24 19:08:30,071 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-24 19:08:30,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-10-24 19:08:30,097 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-24 19:08:30,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-24 19:08:30,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:08:30,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-24 19:08:30,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:08:30,275 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:08:30,540 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 19:08:30,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-10-24 19:08:30,623 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-24 19:08:30,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-10-24 19:08:30,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:08:30,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644228064] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:08:30,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 19:08:30,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 16 [2024-10-24 19:08:30,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121855661] [2024-10-24 19:08:30,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 19:08:30,694 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-24 19:08:30,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:08:30,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-24 19:08:30,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2024-10-24 19:08:32,818 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 101 [2024-10-24 19:08:32,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 85 transitions, 238 flow. Second operand has 18 states, 18 states have (on average 54.833333333333336) internal successors, (987), 18 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:08:32,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:08:32,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 101 [2024-10-24 19:08:32,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:08:33,423 INFO L124 PetriNetUnfolderBase]: 93/386 cut-off events. [2024-10-24 19:08:33,424 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2024-10-24 19:08:33,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 711 conditions, 386 events. 93/386 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1897 event pairs, 90 based on Foata normal form. 2/303 useless extension candidates. Maximal degree in co-relation 563. Up to 218 conditions per place. [2024-10-24 19:08:33,428 INFO L140 encePairwiseOnDemand]: 90/101 looper letters, 54 selfloop transitions, 16 changer transitions 0/108 dead transitions. [2024-10-24 19:08:33,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 108 transitions, 494 flow [2024-10-24 19:08:33,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-24 19:08:33,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-24 19:08:33,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 556 transitions. [2024-10-24 19:08:33,430 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6116611661166117 [2024-10-24 19:08:33,431 INFO L175 Difference]: Start difference. First operand has 90 places, 85 transitions, 238 flow. Second operand 9 states and 556 transitions. [2024-10-24 19:08:33,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 108 transitions, 494 flow [2024-10-24 19:08:33,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 108 transitions, 432 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-24 19:08:33,435 INFO L231 Difference]: Finished difference. Result has 98 places, 93 transitions, 320 flow [2024-10-24 19:08:33,435 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=320, PETRI_PLACES=98, PETRI_TRANSITIONS=93} [2024-10-24 19:08:33,436 INFO L277 CegarLoopForPetriNet]: 103 programPoint places, -5 predicate places. [2024-10-24 19:08:33,436 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 93 transitions, 320 flow [2024-10-24 19:08:33,437 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.833333333333336) internal successors, (987), 18 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:08:33,437 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:08:33,437 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1] [2024-10-24 19:08:33,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-24 19:08:33,642 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:08:33,643 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-10-24 19:08:33,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:08:33,643 INFO L85 PathProgramCache]: Analyzing trace with hash 586277327, now seen corresponding path program 1 times [2024-10-24 19:08:33,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:08:33,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286424925] [2024-10-24 19:08:33,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:08:33,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:08:33,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:08:33,835 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-24 19:08:33,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:08:33,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286424925] [2024-10-24 19:08:33,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286424925] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:08:33,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:08:33,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 19:08:33,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922938403] [2024-10-24 19:08:33,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:08:33,836 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:08:33,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:08:33,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:08:33,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:08:33,952 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 101 [2024-10-24 19:08:33,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 93 transitions, 320 flow. Second operand has 4 states, 4 states have (on average 62.25) internal successors, (249), 4 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:08:33,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:08:33,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 101 [2024-10-24 19:08:33,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:08:34,042 INFO L124 PetriNetUnfolderBase]: 75/327 cut-off events. [2024-10-24 19:08:34,043 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2024-10-24 19:08:34,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 627 conditions, 327 events. 75/327 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1446 event pairs, 72 based on Foata normal form. 5/281 useless extension candidates. Maximal degree in co-relation 553. Up to 214 conditions per place. [2024-10-24 19:08:34,045 INFO L140 encePairwiseOnDemand]: 94/101 looper letters, 50 selfloop transitions, 1 changer transitions 0/87 dead transitions. [2024-10-24 19:08:34,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 87 transitions, 402 flow [2024-10-24 19:08:34,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:08:34,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:08:34,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 217 transitions. [2024-10-24 19:08:34,046 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7161716171617162 [2024-10-24 19:08:34,046 INFO L175 Difference]: Start difference. First operand has 98 places, 93 transitions, 320 flow. Second operand 3 states and 217 transitions. [2024-10-24 19:08:34,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 87 transitions, 402 flow [2024-10-24 19:08:34,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 87 transitions, 382 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-10-24 19:08:34,049 INFO L231 Difference]: Finished difference. Result has 92 places, 87 transitions, 282 flow [2024-10-24 19:08:34,049 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=282, PETRI_PLACES=92, PETRI_TRANSITIONS=87} [2024-10-24 19:08:34,050 INFO L277 CegarLoopForPetriNet]: 103 programPoint places, -11 predicate places. [2024-10-24 19:08:34,050 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 87 transitions, 282 flow [2024-10-24 19:08:34,050 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.25) internal successors, (249), 4 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:08:34,050 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:08:34,050 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-10-24 19:08:34,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-24 19:08:34,050 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-10-24 19:08:34,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:08:34,051 INFO L85 PathProgramCache]: Analyzing trace with hash 586263060, now seen corresponding path program 1 times [2024-10-24 19:08:34,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:08:34,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960673594] [2024-10-24 19:08:34,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:08:34,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:08:34,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:08:34,259 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:08:34,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:08:34,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960673594] [2024-10-24 19:08:34,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960673594] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 19:08:34,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642133637] [2024-10-24 19:08:34,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:08:34,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:08:34,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:08:34,262 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 19:08:34,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-24 19:08:34,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:08:34,443 INFO L255 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-24 19:08:34,445 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:08:34,474 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:08:34,474 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:08:34,522 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:08:34,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642133637] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:08:34,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 19:08:34,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-10-24 19:08:34,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362709390] [2024-10-24 19:08:34,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 19:08:34,524 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-24 19:08:34,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:08:34,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-24 19:08:34,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-10-24 19:08:34,540 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 101 [2024-10-24 19:08:34,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 87 transitions, 282 flow. Second operand has 8 states, 8 states have (on average 72.125) internal successors, (577), 8 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:08:34,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:08:34,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 101 [2024-10-24 19:08:34,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:08:34,699 INFO L124 PetriNetUnfolderBase]: 64/316 cut-off events. [2024-10-24 19:08:34,700 INFO L125 PetriNetUnfolderBase]: For 91/91 co-relation queries the response was YES. [2024-10-24 19:08:34,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 606 conditions, 316 events. 64/316 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1133 event pairs, 63 based on Foata normal form. 4/272 useless extension candidates. Maximal degree in co-relation 591. Up to 153 conditions per place. [2024-10-24 19:08:34,701 INFO L140 encePairwiseOnDemand]: 97/101 looper letters, 61 selfloop transitions, 8 changer transitions 0/109 dead transitions. [2024-10-24 19:08:34,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 109 transitions, 516 flow [2024-10-24 19:08:34,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 19:08:34,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-24 19:08:34,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 617 transitions. [2024-10-24 19:08:34,703 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7636138613861386 [2024-10-24 19:08:34,704 INFO L175 Difference]: Start difference. First operand has 92 places, 87 transitions, 282 flow. Second operand 8 states and 617 transitions. [2024-10-24 19:08:34,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 109 transitions, 516 flow [2024-10-24 19:08:34,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 109 transitions, 515 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 19:08:34,706 INFO L231 Difference]: Finished difference. Result has 101 places, 88 transitions, 317 flow [2024-10-24 19:08:34,706 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=317, PETRI_PLACES=101, PETRI_TRANSITIONS=88} [2024-10-24 19:08:34,707 INFO L277 CegarLoopForPetriNet]: 103 programPoint places, -2 predicate places. [2024-10-24 19:08:34,707 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 88 transitions, 317 flow [2024-10-24 19:08:34,708 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 72.125) internal successors, (577), 8 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:08:34,708 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:08:34,708 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1] [2024-10-24 19:08:34,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-24 19:08:34,908 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-24 19:08:34,909 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-10-24 19:08:34,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:08:34,910 INFO L85 PathProgramCache]: Analyzing trace with hash -147317320, now seen corresponding path program 2 times [2024-10-24 19:08:34,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:08:34,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515773106] [2024-10-24 19:08:34,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:08:34,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:08:35,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:08:36,793 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:08:36,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:08:36,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515773106] [2024-10-24 19:08:36,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515773106] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 19:08:36,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934540364] [2024-10-24 19:08:36,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 19:08:36,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:08:36,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:08:36,797 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 19:08:36,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-24 19:08:37,091 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 19:08:37,091 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:08:37,096 INFO L255 TraceCheckSpWp]: Trace formula consists of 888 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-10-24 19:08:37,101 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:08:37,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:08:37,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-24 19:08:37,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:08:37,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-24 19:08:37,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:08:37,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-24 19:08:37,391 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-24 19:08:37,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-24 19:08:37,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-24 19:08:37,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:08:37,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-24 19:08:37,602 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-24 19:08:37,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-10-24 19:08:37,615 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-24 19:08:37,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-24 19:08:37,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:08:37,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-24 19:08:37,810 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-10-24 19:08:37,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-10-24 19:08:37,824 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-24 19:08:37,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-24 19:08:37,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:08:37,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-24 19:08:38,034 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:08:38,035 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:08:38,255 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 19:08:38,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-10-24 19:08:38,352 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-24 19:08:38,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-10-24 19:08:38,537 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 19:08:38,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-10-24 19:08:38,636 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-24 19:08:38,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-10-24 19:08:38,850 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 19:08:38,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-10-24 19:08:38,931 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-24 19:08:38,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-10-24 19:08:39,155 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-24 19:08:39,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-10-24 19:08:39,225 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-24 19:08:39,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2024-10-24 19:08:39,317 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:08:39,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934540364] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:08:39,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 19:08:39,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 10] total 42 [2024-10-24 19:08:39,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272974634] [2024-10-24 19:08:39,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 19:08:39,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-10-24 19:08:39,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:08:39,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-10-24 19:08:39,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=1566, Unknown=0, NotChecked=0, Total=1892 [2024-10-24 19:08:49,220 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 101 [2024-10-24 19:08:49,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 88 transitions, 317 flow. Second operand has 44 states, 44 states have (on average 55.18181818181818) internal successors, (2428), 44 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:08:49,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:08:49,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 101 [2024-10-24 19:08:49,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:08:50,547 INFO L124 PetriNetUnfolderBase]: 77/389 cut-off events. [2024-10-24 19:08:50,548 INFO L125 PetriNetUnfolderBase]: For 263/263 co-relation queries the response was YES. [2024-10-24 19:08:50,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 834 conditions, 389 events. 77/389 cut-off events. For 263/263 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1508 event pairs, 72 based on Foata normal form. 6/344 useless extension candidates. Maximal degree in co-relation 815. Up to 179 conditions per place. [2024-10-24 19:08:50,550 INFO L140 encePairwiseOnDemand]: 93/101 looper letters, 77 selfloop transitions, 28 changer transitions 0/143 dead transitions. [2024-10-24 19:08:50,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 143 transitions, 861 flow [2024-10-24 19:08:50,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-24 19:08:50,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-10-24 19:08:50,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1065 transitions. [2024-10-24 19:08:50,553 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5858085808580858 [2024-10-24 19:08:50,554 INFO L175 Difference]: Start difference. First operand has 101 places, 88 transitions, 317 flow. Second operand 18 states and 1065 transitions. [2024-10-24 19:08:50,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 143 transitions, 861 flow [2024-10-24 19:08:50,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 143 transitions, 845 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-10-24 19:08:50,559 INFO L231 Difference]: Finished difference. Result has 126 places, 104 transitions, 577 flow [2024-10-24 19:08:50,559 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=577, PETRI_PLACES=126, PETRI_TRANSITIONS=104} [2024-10-24 19:08:50,561 INFO L277 CegarLoopForPetriNet]: 103 programPoint places, 23 predicate places. [2024-10-24 19:08:50,561 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 104 transitions, 577 flow [2024-10-24 19:08:50,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 55.18181818181818) internal successors, (2428), 44 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:08:50,562 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:08:50,562 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1] [2024-10-24 19:08:50,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-24 19:08:50,762 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:08:50,763 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-10-24 19:08:50,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:08:50,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1750000156, now seen corresponding path program 2 times [2024-10-24 19:08:50,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:08:50,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409692104] [2024-10-24 19:08:50,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:08:50,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:08:50,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:08:51,189 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:08:51,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:08:51,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409692104] [2024-10-24 19:08:51,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409692104] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 19:08:51,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985261358] [2024-10-24 19:08:51,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 19:08:51,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:08:51,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:08:51,191 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 19:08:51,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-24 19:08:51,558 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 19:08:51,558 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:08:51,565 INFO L255 TraceCheckSpWp]: Trace formula consists of 1288 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 19:08:51,571 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:08:51,649 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:08:51,649 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:08:51,752 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:08:51,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985261358] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:08:51,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 19:08:51,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2024-10-24 19:08:51,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906187167] [2024-10-24 19:08:51,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 19:08:51,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-24 19:08:51,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 19:08:51,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-24 19:08:51,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2024-10-24 19:08:51,775 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 101 [2024-10-24 19:08:51,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 104 transitions, 577 flow. Second operand has 12 states, 12 states have (on average 73.66666666666667) internal successors, (884), 12 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:08:51,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:08:51,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 101 [2024-10-24 19:08:51,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:08:51,981 INFO L124 PetriNetUnfolderBase]: 64/358 cut-off events. [2024-10-24 19:08:51,981 INFO L125 PetriNetUnfolderBase]: For 526/526 co-relation queries the response was YES. [2024-10-24 19:08:51,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 849 conditions, 358 events. 64/358 cut-off events. For 526/526 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1146 event pairs, 63 based on Foata normal form. 4/314 useless extension candidates. Maximal degree in co-relation 818. Up to 153 conditions per place. [2024-10-24 19:08:51,984 INFO L140 encePairwiseOnDemand]: 97/101 looper letters, 86 selfloop transitions, 12 changer transitions 0/138 dead transitions. [2024-10-24 19:08:51,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 138 transitions, 947 flow [2024-10-24 19:08:51,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-24 19:08:51,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-24 19:08:51,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 917 transitions. [2024-10-24 19:08:51,987 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7566006600660066 [2024-10-24 19:08:51,987 INFO L175 Difference]: Start difference. First operand has 126 places, 104 transitions, 577 flow. Second operand 12 states and 917 transitions. [2024-10-24 19:08:51,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 138 transitions, 947 flow [2024-10-24 19:08:51,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 138 transitions, 864 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-10-24 19:08:51,994 INFO L231 Difference]: Finished difference. Result has 130 places, 101 transitions, 480 flow [2024-10-24 19:08:51,994 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=443, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=480, PETRI_PLACES=130, PETRI_TRANSITIONS=101} [2024-10-24 19:08:51,996 INFO L277 CegarLoopForPetriNet]: 103 programPoint places, 27 predicate places. [2024-10-24 19:08:51,996 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 101 transitions, 480 flow [2024-10-24 19:08:51,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 73.66666666666667) internal successors, (884), 12 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:08:51,996 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:08:51,997 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1] [2024-10-24 19:08:52,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-24 19:08:52,197 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:08:52,197 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2024-10-24 19:08:52,198 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:08:52,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1457830256, now seen corresponding path program 3 times [2024-10-24 19:08:52,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 19:08:52,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810618631] [2024-10-24 19:08:52,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:08:52,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 19:08:52,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:08:52,974 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 399 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:08:52,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 19:08:52,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810618631] [2024-10-24 19:08:52,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810618631] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 19:08:52,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58777790] [2024-10-24 19:08:52,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 19:08:52,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 19:08:52,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:08:52,977 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 19:08:52,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process