./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/reorder_5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a046e57d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/reorder_5.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 0517a9ebb69eeca4ecbb6ac063832eb703719698fb2ee670ca348e2c511f9dfd --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-mul-div-a046e57-m [2024-10-13 12:08:04,182 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-13 12:08:04,253 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-13 12:08:04,262 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-13 12:08:04,264 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-13 12:08:04,315 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-13 12:08:04,317 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-13 12:08:04,318 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-13 12:08:04,319 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-13 12:08:04,320 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-13 12:08:04,320 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-13 12:08:04,321 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-13 12:08:04,321 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-13 12:08:04,322 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-13 12:08:04,324 INFO L153 SettingsManager]: * Use SBE=true [2024-10-13 12:08:04,325 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-13 12:08:04,325 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-13 12:08:04,326 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-13 12:08:04,326 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-13 12:08:04,326 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-13 12:08:04,326 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-13 12:08:04,327 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-13 12:08:04,331 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-13 12:08:04,332 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-13 12:08:04,332 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-13 12:08:04,332 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-13 12:08:04,332 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-13 12:08:04,332 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-13 12:08:04,333 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-13 12:08:04,333 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-13 12:08:04,333 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-13 12:08:04,333 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-13 12:08:04,334 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-13 12:08:04,334 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 12:08:04,334 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-13 12:08:04,335 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-13 12:08:04,337 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-13 12:08:04,337 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-13 12:08:04,337 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-13 12:08:04,338 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-13 12:08:04,338 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-13 12:08:04,338 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-13 12:08:04,338 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0517a9ebb69eeca4ecbb6ac063832eb703719698fb2ee670ca348e2c511f9dfd [2024-10-13 12:08:04,665 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-13 12:08:04,698 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-13 12:08:04,701 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-13 12:08:04,702 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-13 12:08:04,702 INFO L274 PluginConnector]: CDTParser initialized [2024-10-13 12:08:04,704 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/reorder_5.i [2024-10-13 12:08:06,274 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-13 12:08:06,564 INFO L384 CDTParser]: Found 1 translation units. [2024-10-13 12:08:06,568 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/reorder_5.i [2024-10-13 12:08:06,598 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b9ebe519/83cabd92f3224af9b6e015013cf93a5c/FLAG7a791be2d [2024-10-13 12:08:06,615 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b9ebe519/83cabd92f3224af9b6e015013cf93a5c [2024-10-13 12:08:06,620 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-13 12:08:06,622 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-13 12:08:06,626 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-13 12:08:06,627 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-13 12:08:06,633 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-13 12:08:06,634 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:08:06" (1/1) ... [2024-10-13 12:08:06,635 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6624807 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:08:06, skipping insertion in model container [2024-10-13 12:08:06,635 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:08:06" (1/1) ... [2024-10-13 12:08:06,687 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-13 12:08:07,312 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 12:08:07,325 INFO L200 MainTranslator]: Completed pre-run [2024-10-13 12:08:07,400 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-13 12:08:07,477 INFO L204 MainTranslator]: Completed translation [2024-10-13 12:08:07,478 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:08:07 WrapperNode [2024-10-13 12:08:07,478 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-13 12:08:07,479 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-13 12:08:07,479 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-13 12:08:07,480 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-13 12:08:07,486 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:08:07" (1/1) ... [2024-10-13 12:08:07,504 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:08:07" (1/1) ... [2024-10-13 12:08:07,536 INFO L138 Inliner]: procedures = 371, calls = 28, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 139 [2024-10-13 12:08:07,536 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-13 12:08:07,537 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-13 12:08:07,537 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-13 12:08:07,538 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-13 12:08:07,549 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:08:07" (1/1) ... [2024-10-13 12:08:07,550 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:08:07" (1/1) ... [2024-10-13 12:08:07,553 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:08:07" (1/1) ... [2024-10-13 12:08:07,570 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-10-13 12:08:07,571 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:08:07" (1/1) ... [2024-10-13 12:08:07,571 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:08:07" (1/1) ... [2024-10-13 12:08:07,579 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:08:07" (1/1) ... [2024-10-13 12:08:07,583 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:08:07" (1/1) ... [2024-10-13 12:08:07,585 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:08:07" (1/1) ... [2024-10-13 12:08:07,587 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:08:07" (1/1) ... [2024-10-13 12:08:07,591 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-13 12:08:07,592 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-13 12:08:07,592 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-13 12:08:07,592 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-13 12:08:07,593 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:08:07" (1/1) ... [2024-10-13 12:08:07,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-13 12:08:07,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:08:07,654 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) [2024-10-13 12:08:07,661 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 [2024-10-13 12:08:07,725 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-13 12:08:07,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-13 12:08:07,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-13 12:08:07,725 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-13 12:08:07,727 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-13 12:08:07,727 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-13 12:08:07,727 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-13 12:08:07,727 INFO L130 BoogieDeclarations]: Found specification of procedure setThread [2024-10-13 12:08:07,727 INFO L138 BoogieDeclarations]: Found implementation of procedure setThread [2024-10-13 12:08:07,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-13 12:08:07,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-13 12:08:07,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-13 12:08:07,727 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-13 12:08:07,728 INFO L130 BoogieDeclarations]: Found specification of procedure checkThread [2024-10-13 12:08:07,728 INFO L138 BoogieDeclarations]: Found implementation of procedure checkThread [2024-10-13 12:08:07,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-13 12:08:07,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-13 12:08:07,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-13 12:08:07,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-13 12:08:07,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-13 12:08:07,733 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-13 12:08:07,939 INFO L238 CfgBuilder]: Building ICFG [2024-10-13 12:08:07,942 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-13 12:08:08,236 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-13 12:08:08,236 INFO L287 CfgBuilder]: Performing block encoding [2024-10-13 12:08:08,410 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-13 12:08:08,410 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-13 12:08:08,410 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:08:08 BoogieIcfgContainer [2024-10-13 12:08:08,411 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-13 12:08:08,413 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-13 12:08:08,414 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-13 12:08:08,419 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-13 12:08:08,419 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:08:06" (1/3) ... [2024-10-13 12:08:08,421 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d27691f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:08:08, skipping insertion in model container [2024-10-13 12:08:08,421 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:08:07" (2/3) ... [2024-10-13 12:08:08,422 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d27691f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:08:08, skipping insertion in model container [2024-10-13 12:08:08,422 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:08:08" (3/3) ... [2024-10-13 12:08:08,424 INFO L112 eAbstractionObserver]: Analyzing ICFG reorder_5.i [2024-10-13 12:08:08,443 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-13 12:08:08,443 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2024-10-13 12:08:08,444 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-13 12:08:08,510 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-10-13 12:08:08,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 56 transitions, 132 flow [2024-10-13 12:08:08,594 INFO L124 PetriNetUnfolderBase]: 12/131 cut-off events. [2024-10-13 12:08:08,594 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-10-13 12:08:08,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 131 events. 12/131 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 628 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 69. Up to 7 conditions per place. [2024-10-13 12:08:08,600 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 56 transitions, 132 flow [2024-10-13 12:08:08,606 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 56 transitions, 132 flow [2024-10-13 12:08:08,622 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 12:08:08,628 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;@71f3b920, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 12:08:08,629 INFO L334 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2024-10-13 12:08:08,633 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 12:08:08,634 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-10-13 12:08:08,634 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:08:08,634 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:08:08,635 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-10-13 12:08:08,635 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 12 more)] === [2024-10-13 12:08:08,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:08:08,642 INFO L85 PathProgramCache]: Analyzing trace with hash 12383528, now seen corresponding path program 1 times [2024-10-13 12:08:08,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:08:08,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491244473] [2024-10-13 12:08:08,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:08:08,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:08:08,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:08:08,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:08:08,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:08:08,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491244473] [2024-10-13 12:08:08,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491244473] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:08:08,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:08:08,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-13 12:08:08,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86640340] [2024-10-13 12:08:08,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:08:08,836 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-13 12:08:08,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:08:08,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-13 12:08:08,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-13 12:08:08,871 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 56 [2024-10-13 12:08:08,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 56 transitions, 132 flow. Second operand has 2 states, 2 states have (on average 29.0) internal successors, (58), 2 states have internal predecessors, (58), 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) [2024-10-13 12:08:08,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:08:08,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 56 [2024-10-13 12:08:08,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:08:09,071 INFO L124 PetriNetUnfolderBase]: 86/374 cut-off events. [2024-10-13 12:08:09,071 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2024-10-13 12:08:09,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 374 events. 86/374 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2551 event pairs, 71 based on Foata normal form. 24/272 useless extension candidates. Maximal degree in co-relation 373. Up to 190 conditions per place. [2024-10-13 12:08:09,077 INFO L140 encePairwiseOnDemand]: 52/56 looper letters, 24 selfloop transitions, 0 changer transitions 0/52 dead transitions. [2024-10-13 12:08:09,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 52 transitions, 172 flow [2024-10-13 12:08:09,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-13 12:08:09,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-13 12:08:09,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 84 transitions. [2024-10-13 12:08:09,096 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.75 [2024-10-13 12:08:09,101 INFO L175 Difference]: Start difference. First operand has 54 places, 56 transitions, 132 flow. Second operand 2 states and 84 transitions. [2024-10-13 12:08:09,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 52 transitions, 172 flow [2024-10-13 12:08:09,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 52 transitions, 172 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 12:08:09,111 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 124 flow [2024-10-13 12:08:09,114 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=124, PETRI_PLACES=53, PETRI_TRANSITIONS=52} [2024-10-13 12:08:09,119 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2024-10-13 12:08:09,120 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 124 flow [2024-10-13 12:08:09,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 29.0) internal successors, (58), 2 states have internal predecessors, (58), 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) [2024-10-13 12:08:09,121 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:08:09,121 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-13 12:08:09,121 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-13 12:08:09,122 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 12 more)] === [2024-10-13 12:08:09,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:08:09,124 INFO L85 PathProgramCache]: Analyzing trace with hash 383952134, now seen corresponding path program 1 times [2024-10-13 12:08:09,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:08:09,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232041754] [2024-10-13 12:08:09,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:08:09,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:08:09,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:08:09,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:08:09,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:08:09,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232041754] [2024-10-13 12:08:09,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232041754] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:08:09,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:08:09,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:08:09,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396431905] [2024-10-13 12:08:09,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:08:09,361 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:08:09,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:08:09,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:08:09,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:08:09,401 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 56 [2024-10-13 12:08:09,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 52 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2024-10-13 12:08:09,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:08:09,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 56 [2024-10-13 12:08:09,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:08:09,554 INFO L124 PetriNetUnfolderBase]: 97/367 cut-off events. [2024-10-13 12:08:09,555 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2024-10-13 12:08:09,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 609 conditions, 367 events. 97/367 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2443 event pairs, 65 based on Foata normal form. 0/270 useless extension candidates. Maximal degree in co-relation 604. Up to 168 conditions per place. [2024-10-13 12:08:09,561 INFO L140 encePairwiseOnDemand]: 52/56 looper letters, 27 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2024-10-13 12:08:09,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 53 transitions, 184 flow [2024-10-13 12:08:09,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:08:09,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:08:09,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2024-10-13 12:08:09,566 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6130952380952381 [2024-10-13 12:08:09,566 INFO L175 Difference]: Start difference. First operand has 53 places, 52 transitions, 124 flow. Second operand 3 states and 103 transitions. [2024-10-13 12:08:09,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 53 transitions, 184 flow [2024-10-13 12:08:09,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 53 transitions, 184 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 12:08:09,571 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 124 flow [2024-10-13 12:08:09,571 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2024-10-13 12:08:09,572 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2024-10-13 12:08:09,575 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 124 flow [2024-10-13 12:08:09,576 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 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) [2024-10-13 12:08:09,576 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:08:09,576 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-13 12:08:09,576 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-13 12:08:09,576 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 12 more)] === [2024-10-13 12:08:09,577 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:08:09,577 INFO L85 PathProgramCache]: Analyzing trace with hash 383952135, now seen corresponding path program 1 times [2024-10-13 12:08:09,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:08:09,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236641661] [2024-10-13 12:08:09,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:08:09,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:08:09,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:08:09,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:08:09,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:08:09,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236641661] [2024-10-13 12:08:09,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236641661] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:08:09,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:08:09,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 12:08:09,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981195294] [2024-10-13 12:08:09,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:08:09,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 12:08:09,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:08:09,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 12:08:09,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-13 12:08:10,035 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 56 [2024-10-13 12:08:10,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 124 flow. Second operand has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 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) [2024-10-13 12:08:10,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:08:10,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 56 [2024-10-13 12:08:10,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:08:10,271 INFO L124 PetriNetUnfolderBase]: 184/694 cut-off events. [2024-10-13 12:08:10,271 INFO L125 PetriNetUnfolderBase]: For 92/92 co-relation queries the response was YES. [2024-10-13 12:08:10,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1175 conditions, 694 events. 184/694 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5529 event pairs, 124 based on Foata normal form. 1/523 useless extension candidates. Maximal degree in co-relation 1169. Up to 215 conditions per place. [2024-10-13 12:08:10,281 INFO L140 encePairwiseOnDemand]: 50/56 looper letters, 47 selfloop transitions, 4 changer transitions 0/75 dead transitions. [2024-10-13 12:08:10,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 75 transitions, 298 flow [2024-10-13 12:08:10,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 12:08:10,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 12:08:10,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 157 transitions. [2024-10-13 12:08:10,287 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7008928571428571 [2024-10-13 12:08:10,287 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 124 flow. Second operand 4 states and 157 transitions. [2024-10-13 12:08:10,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 75 transitions, 298 flow [2024-10-13 12:08:10,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 75 transitions, 290 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:08:10,294 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 146 flow [2024-10-13 12:08:10,295 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=146, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2024-10-13 12:08:10,296 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 2 predicate places. [2024-10-13 12:08:10,297 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 146 flow [2024-10-13 12:08:10,297 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 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) [2024-10-13 12:08:10,297 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:08:10,297 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:08:10,298 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-13 12:08:10,298 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 12 more)] === [2024-10-13 12:08:10,298 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:08:10,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1038331480, now seen corresponding path program 1 times [2024-10-13 12:08:10,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:08:10,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945877773] [2024-10-13 12:08:10,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:08:10,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:08:10,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:08:10,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:08:10,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:08:10,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945877773] [2024-10-13 12:08:10,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945877773] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:08:10,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:08:10,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 12:08:10,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956334778] [2024-10-13 12:08:10,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:08:10,537 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 12:08:10,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:08:10,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 12:08:10,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 12:08:10,592 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 56 [2024-10-13 12:08:10,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 146 flow. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 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) [2024-10-13 12:08:10,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:08:10,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 56 [2024-10-13 12:08:10,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:08:10,783 INFO L124 PetriNetUnfolderBase]: 226/744 cut-off events. [2024-10-13 12:08:10,783 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2024-10-13 12:08:10,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1321 conditions, 744 events. 226/744 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 5965 event pairs, 198 based on Foata normal form. 1/518 useless extension candidates. Maximal degree in co-relation 1313. Up to 488 conditions per place. [2024-10-13 12:08:10,791 INFO L140 encePairwiseOnDemand]: 48/56 looper letters, 36 selfloop transitions, 7 changer transitions 2/66 dead transitions. [2024-10-13 12:08:10,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 66 transitions, 269 flow [2024-10-13 12:08:10,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 12:08:10,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 12:08:10,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 137 transitions. [2024-10-13 12:08:10,794 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6116071428571429 [2024-10-13 12:08:10,795 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 146 flow. Second operand 4 states and 137 transitions. [2024-10-13 12:08:10,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 66 transitions, 269 flow [2024-10-13 12:08:10,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 66 transitions, 267 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 12:08:10,797 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 184 flow [2024-10-13 12:08:10,800 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=184, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2024-10-13 12:08:10,801 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 6 predicate places. [2024-10-13 12:08:10,802 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 184 flow [2024-10-13 12:08:10,803 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 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) [2024-10-13 12:08:10,803 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:08:10,803 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:08:10,803 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-13 12:08:10,804 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 12 more)] === [2024-10-13 12:08:10,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:08:10,805 INFO L85 PathProgramCache]: Analyzing trace with hash -2123503166, now seen corresponding path program 1 times [2024-10-13 12:08:10,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:08:10,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581690625] [2024-10-13 12:08:10,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:08:10,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:08:10,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:08:10,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:08:10,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:08:10,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581690625] [2024-10-13 12:08:10,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581690625] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:08:10,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:08:10,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:08:10,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970068774] [2024-10-13 12:08:10,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:08:10,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:08:10,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:08:10,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:08:10,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:08:10,875 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 56 [2024-10-13 12:08:10,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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) [2024-10-13 12:08:10,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:08:10,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 56 [2024-10-13 12:08:10,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:08:10,994 INFO L124 PetriNetUnfolderBase]: 200/664 cut-off events. [2024-10-13 12:08:10,994 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2024-10-13 12:08:10,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1291 conditions, 664 events. 200/664 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5154 event pairs, 142 based on Foata normal form. 0/583 useless extension candidates. Maximal degree in co-relation 1281. Up to 349 conditions per place. [2024-10-13 12:08:11,000 INFO L140 encePairwiseOnDemand]: 52/56 looper letters, 30 selfloop transitions, 4 changer transitions 0/56 dead transitions. [2024-10-13 12:08:11,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 56 transitions, 254 flow [2024-10-13 12:08:11,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:08:11,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:08:11,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2024-10-13 12:08:11,006 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6130952380952381 [2024-10-13 12:08:11,006 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 184 flow. Second operand 3 states and 103 transitions. [2024-10-13 12:08:11,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 56 transitions, 254 flow [2024-10-13 12:08:11,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 56 transitions, 243 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-10-13 12:08:11,009 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 177 flow [2024-10-13 12:08:11,012 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=177, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-10-13 12:08:11,015 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 4 predicate places. [2024-10-13 12:08:11,015 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 177 flow [2024-10-13 12:08:11,016 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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) [2024-10-13 12:08:11,016 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:08:11,016 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:08:11,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-13 12:08:11,019 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 12 more)] === [2024-10-13 12:08:11,019 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:08:11,019 INFO L85 PathProgramCache]: Analyzing trace with hash -2123503165, now seen corresponding path program 1 times [2024-10-13 12:08:11,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:08:11,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731754858] [2024-10-13 12:08:11,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:08:11,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:08:11,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:08:11,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:08:11,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:08:11,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731754858] [2024-10-13 12:08:11,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731754858] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:08:11,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:08:11,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 12:08:11,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848254985] [2024-10-13 12:08:11,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:08:11,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 12:08:11,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:08:11,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 12:08:11,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 12:08:11,225 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 56 [2024-10-13 12:08:11,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 177 flow. Second operand has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 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) [2024-10-13 12:08:11,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:08:11,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 56 [2024-10-13 12:08:11,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:08:11,425 INFO L124 PetriNetUnfolderBase]: 271/768 cut-off events. [2024-10-13 12:08:11,425 INFO L125 PetriNetUnfolderBase]: For 131/131 co-relation queries the response was YES. [2024-10-13 12:08:11,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1586 conditions, 768 events. 271/768 cut-off events. For 131/131 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5836 event pairs, 36 based on Foata normal form. 0/660 useless extension candidates. Maximal degree in co-relation 1576. Up to 238 conditions per place. [2024-10-13 12:08:11,432 INFO L140 encePairwiseOnDemand]: 43/56 looper letters, 41 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2024-10-13 12:08:11,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 76 transitions, 355 flow [2024-10-13 12:08:11,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 12:08:11,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 12:08:11,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 170 transitions. [2024-10-13 12:08:11,434 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-10-13 12:08:11,434 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 177 flow. Second operand 5 states and 170 transitions. [2024-10-13 12:08:11,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 76 transitions, 355 flow [2024-10-13 12:08:11,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 76 transitions, 345 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:08:11,439 INFO L231 Difference]: Finished difference. Result has 63 places, 61 transitions, 266 flow [2024-10-13 12:08:11,439 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=266, PETRI_PLACES=63, PETRI_TRANSITIONS=61} [2024-10-13 12:08:11,440 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 9 predicate places. [2024-10-13 12:08:11,440 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 61 transitions, 266 flow [2024-10-13 12:08:11,441 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 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) [2024-10-13 12:08:11,441 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:08:11,441 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:08:11,441 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-13 12:08:11,441 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 12 more)] === [2024-10-13 12:08:11,442 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:08:11,442 INFO L85 PathProgramCache]: Analyzing trace with hash -335048156, now seen corresponding path program 1 times [2024-10-13 12:08:11,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:08:11,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202829736] [2024-10-13 12:08:11,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:08:11,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:08:11,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:08:11,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:08:11,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:08:11,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202829736] [2024-10-13 12:08:11,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202829736] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:08:11,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525895087] [2024-10-13 12:08:11,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:08:11,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:08:11,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:08:11,727 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) [2024-10-13 12:08:11,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-13 12:08:11,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:08:11,818 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-13 12:08:11,824 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:08:11,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 12:08:11,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-10-13 12:08:11,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-10-13 12:08:12,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:08:12,025 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:08:12,149 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-13 12:08:12,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:08:12,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525895087] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:08:12,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:08:12,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 4] total 12 [2024-10-13 12:08:12,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701115750] [2024-10-13 12:08:12,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:08:12,175 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-13 12:08:12,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:08:12,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-13 12:08:12,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2024-10-13 12:08:12,395 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 56 [2024-10-13 12:08:12,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 61 transitions, 266 flow. Second operand has 14 states, 14 states have (on average 24.714285714285715) internal successors, (346), 14 states have internal predecessors, (346), 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) [2024-10-13 12:08:12,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:08:12,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 56 [2024-10-13 12:08:12,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:08:12,614 INFO L124 PetriNetUnfolderBase]: 139/439 cut-off events. [2024-10-13 12:08:12,615 INFO L125 PetriNetUnfolderBase]: For 180/180 co-relation queries the response was YES. [2024-10-13 12:08:12,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1084 conditions, 439 events. 139/439 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2917 event pairs, 102 based on Foata normal form. 4/391 useless extension candidates. Maximal degree in co-relation 1071. Up to 263 conditions per place. [2024-10-13 12:08:12,620 INFO L140 encePairwiseOnDemand]: 47/56 looper letters, 42 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-10-13 12:08:12,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 71 transitions, 396 flow [2024-10-13 12:08:12,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-13 12:08:12,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-13 12:08:12,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-10-13 12:08:12,622 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5386904761904762 [2024-10-13 12:08:12,622 INFO L175 Difference]: Start difference. First operand has 63 places, 61 transitions, 266 flow. Second operand 6 states and 181 transitions. [2024-10-13 12:08:12,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 71 transitions, 396 flow [2024-10-13 12:08:12,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 71 transitions, 391 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 12:08:12,628 INFO L231 Difference]: Finished difference. Result has 69 places, 62 transitions, 295 flow [2024-10-13 12:08:12,628 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=295, PETRI_PLACES=69, PETRI_TRANSITIONS=62} [2024-10-13 12:08:12,629 INFO L277 CegarLoopForPetriNet]: 54 programPoint places, 15 predicate places. [2024-10-13 12:08:12,629 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 62 transitions, 295 flow [2024-10-13 12:08:12,630 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 24.714285714285715) internal successors, (346), 14 states have internal predecessors, (346), 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) [2024-10-13 12:08:12,630 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:08:12,630 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2024-10-13 12:08:12,650 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-13 12:08:12,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:08:12,832 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 12 more)] === [2024-10-13 12:08:12,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:08:12,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1796557912, now seen corresponding path program 1 times [2024-10-13 12:08:12,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:08:12,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072064280] [2024-10-13 12:08:12,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:08:12,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:08:12,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:08:12,853 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-13 12:08:12,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:08:12,895 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-13 12:08:12,896 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-13 12:08:12,897 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (14 of 15 remaining) [2024-10-13 12:08:12,899 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (13 of 15 remaining) [2024-10-13 12:08:12,900 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX (12 of 15 remaining) [2024-10-13 12:08:12,900 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (11 of 15 remaining) [2024-10-13 12:08:12,900 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 15 remaining) [2024-10-13 12:08:12,900 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 15 remaining) [2024-10-13 12:08:12,901 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 15 remaining) [2024-10-13 12:08:12,901 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 15 remaining) [2024-10-13 12:08:12,901 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 15 remaining) [2024-10-13 12:08:12,901 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 15 remaining) [2024-10-13 12:08:12,901 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 15 remaining) [2024-10-13 12:08:12,902 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 15 remaining) [2024-10-13 12:08:12,902 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK (2 of 15 remaining) [2024-10-13 12:08:12,902 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 15 remaining) [2024-10-13 12:08:12,902 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 15 remaining) [2024-10-13 12:08:12,902 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-13 12:08:12,903 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:08:12,906 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-13 12:08:12,906 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-13 12:08:12,930 INFO L143 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2024-10-13 12:08:12,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 74 transitions, 192 flow [2024-10-13 12:08:12,977 INFO L124 PetriNetUnfolderBase]: 65/432 cut-off events. [2024-10-13 12:08:12,977 INFO L125 PetriNetUnfolderBase]: For 72/75 co-relation queries the response was YES. [2024-10-13 12:08:12,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 521 conditions, 432 events. 65/432 cut-off events. For 72/75 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2627 event pairs, 1 based on Foata normal form. 0/268 useless extension candidates. Maximal degree in co-relation 267. Up to 32 conditions per place. [2024-10-13 12:08:12,979 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 74 transitions, 192 flow [2024-10-13 12:08:12,982 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 74 transitions, 192 flow [2024-10-13 12:08:12,983 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 12:08:12,985 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;@71f3b920, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 12:08:12,985 INFO L334 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2024-10-13 12:08:12,986 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 12:08:12,986 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-10-13 12:08:12,986 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:08:12,987 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:08:12,987 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-10-13 12:08:12,987 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 13 more)] === [2024-10-13 12:08:12,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:08:12,987 INFO L85 PathProgramCache]: Analyzing trace with hash 14599976, now seen corresponding path program 1 times [2024-10-13 12:08:12,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:08:12,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73969767] [2024-10-13 12:08:12,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:08:12,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:08:12,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:08:13,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:08:13,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:08:13,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73969767] [2024-10-13 12:08:13,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73969767] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:08:13,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:08:13,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-13 12:08:13,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442185697] [2024-10-13 12:08:13,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:08:13,005 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-13 12:08:13,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:08:13,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-13 12:08:13,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-13 12:08:13,007 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 74 [2024-10-13 12:08:13,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 74 transitions, 192 flow. Second operand has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 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) [2024-10-13 12:08:13,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:08:13,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 74 [2024-10-13 12:08:13,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:08:13,495 INFO L124 PetriNetUnfolderBase]: 1996/4885 cut-off events. [2024-10-13 12:08:13,495 INFO L125 PetriNetUnfolderBase]: For 1152/1152 co-relation queries the response was YES. [2024-10-13 12:08:13,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8388 conditions, 4885 events. 1996/4885 cut-off events. For 1152/1152 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 46373 event pairs, 1718 based on Foata normal form. 532/4272 useless extension candidates. Maximal degree in co-relation 3145. Up to 3077 conditions per place. [2024-10-13 12:08:13,541 INFO L140 encePairwiseOnDemand]: 69/74 looper letters, 33 selfloop transitions, 0 changer transitions 0/69 dead transitions. [2024-10-13 12:08:13,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 69 transitions, 248 flow [2024-10-13 12:08:13,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-13 12:08:13,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-13 12:08:13,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 110 transitions. [2024-10-13 12:08:13,543 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7432432432432432 [2024-10-13 12:08:13,543 INFO L175 Difference]: Start difference. First operand has 71 places, 74 transitions, 192 flow. Second operand 2 states and 110 transitions. [2024-10-13 12:08:13,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 69 transitions, 248 flow [2024-10-13 12:08:13,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 69 transitions, 248 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 12:08:13,546 INFO L231 Difference]: Finished difference. Result has 70 places, 69 transitions, 182 flow [2024-10-13 12:08:13,547 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=182, PETRI_PLACES=70, PETRI_TRANSITIONS=69} [2024-10-13 12:08:13,547 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, -1 predicate places. [2024-10-13 12:08:13,547 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 69 transitions, 182 flow [2024-10-13 12:08:13,548 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 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) [2024-10-13 12:08:13,548 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:08:13,548 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-13 12:08:13,548 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-13 12:08:13,548 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 13 more)] === [2024-10-13 12:08:13,549 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:08:13,549 INFO L85 PathProgramCache]: Analyzing trace with hash 452662094, now seen corresponding path program 1 times [2024-10-13 12:08:13,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:08:13,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17366817] [2024-10-13 12:08:13,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:08:13,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:08:13,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:08:13,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:08:13,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:08:13,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17366817] [2024-10-13 12:08:13,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17366817] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:08:13,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:08:13,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:08:13,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317969703] [2024-10-13 12:08:13,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:08:13,610 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:08:13,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:08:13,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:08:13,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:08:13,628 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 74 [2024-10-13 12:08:13,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 69 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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) [2024-10-13 12:08:13,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:08:13,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 74 [2024-10-13 12:08:13,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:08:14,145 INFO L124 PetriNetUnfolderBase]: 2241/4979 cut-off events. [2024-10-13 12:08:14,146 INFO L125 PetriNetUnfolderBase]: For 811/811 co-relation queries the response was YES. [2024-10-13 12:08:14,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8879 conditions, 4979 events. 2241/4979 cut-off events. For 811/811 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 45580 event pairs, 1483 based on Foata normal form. 0/4133 useless extension candidates. Maximal degree in co-relation 8872. Up to 2701 conditions per place. [2024-10-13 12:08:14,197 INFO L140 encePairwiseOnDemand]: 70/74 looper letters, 39 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2024-10-13 12:08:14,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 73 transitions, 272 flow [2024-10-13 12:08:14,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:08:14,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:08:14,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 139 transitions. [2024-10-13 12:08:14,199 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6261261261261262 [2024-10-13 12:08:14,200 INFO L175 Difference]: Start difference. First operand has 70 places, 69 transitions, 182 flow. Second operand 3 states and 139 transitions. [2024-10-13 12:08:14,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 73 transitions, 272 flow [2024-10-13 12:08:14,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 73 transitions, 272 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 12:08:14,203 INFO L231 Difference]: Finished difference. Result has 70 places, 67 transitions, 182 flow [2024-10-13 12:08:14,204 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=70, PETRI_TRANSITIONS=67} [2024-10-13 12:08:14,205 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, -1 predicate places. [2024-10-13 12:08:14,205 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 67 transitions, 182 flow [2024-10-13 12:08:14,206 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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) [2024-10-13 12:08:14,206 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:08:14,206 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-13 12:08:14,206 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-13 12:08:14,206 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 13 more)] === [2024-10-13 12:08:14,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:08:14,207 INFO L85 PathProgramCache]: Analyzing trace with hash 452662095, now seen corresponding path program 1 times [2024-10-13 12:08:14,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:08:14,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591068699] [2024-10-13 12:08:14,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:08:14,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:08:14,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:08:14,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:08:14,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:08:14,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591068699] [2024-10-13 12:08:14,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591068699] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:08:14,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:08:14,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 12:08:14,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346602728] [2024-10-13 12:08:14,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:08:14,340 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 12:08:14,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:08:14,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 12:08:14,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-13 12:08:14,402 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 74 [2024-10-13 12:08:14,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 67 transitions, 182 flow. Second operand has 5 states, 5 states have (on average 34.8) internal successors, (174), 5 states have internal predecessors, (174), 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) [2024-10-13 12:08:14,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:08:14,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 74 [2024-10-13 12:08:14,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:08:15,587 INFO L124 PetriNetUnfolderBase]: 4433/9798 cut-off events. [2024-10-13 12:08:15,587 INFO L125 PetriNetUnfolderBase]: For 2286/2286 co-relation queries the response was YES. [2024-10-13 12:08:15,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17782 conditions, 9798 events. 4433/9798 cut-off events. For 2286/2286 co-relation queries the response was YES. Maximal size of possible extension queue 691. Compared 99345 event pairs, 3470 based on Foata normal form. 1/8137 useless extension candidates. Maximal degree in co-relation 17774. Up to 3472 conditions per place. [2024-10-13 12:08:15,661 INFO L140 encePairwiseOnDemand]: 68/74 looper letters, 66 selfloop transitions, 4 changer transitions 0/102 dead transitions. [2024-10-13 12:08:15,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 102 transitions, 436 flow [2024-10-13 12:08:15,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 12:08:15,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 12:08:15,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 208 transitions. [2024-10-13 12:08:15,663 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7027027027027027 [2024-10-13 12:08:15,663 INFO L175 Difference]: Start difference. First operand has 70 places, 67 transitions, 182 flow. Second operand 4 states and 208 transitions. [2024-10-13 12:08:15,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 102 transitions, 436 flow [2024-10-13 12:08:15,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 102 transitions, 428 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:08:15,683 INFO L231 Difference]: Finished difference. Result has 73 places, 69 transitions, 204 flow [2024-10-13 12:08:15,685 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=204, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2024-10-13 12:08:15,685 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 2 predicate places. [2024-10-13 12:08:15,686 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 204 flow [2024-10-13 12:08:15,686 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.8) internal successors, (174), 5 states have internal predecessors, (174), 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) [2024-10-13 12:08:15,686 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:08:15,686 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:08:15,686 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-13 12:08:15,687 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 13 more)] === [2024-10-13 12:08:15,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:08:15,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1495725480, now seen corresponding path program 1 times [2024-10-13 12:08:15,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:08:15,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493216357] [2024-10-13 12:08:15,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:08:15,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:08:15,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:08:15,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:08:15,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:08:15,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493216357] [2024-10-13 12:08:15,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493216357] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:08:15,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:08:15,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 12:08:15,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335996958] [2024-10-13 12:08:15,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:08:15,833 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 12:08:15,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:08:15,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 12:08:15,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 12:08:15,878 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 74 [2024-10-13 12:08:15,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 204 flow. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 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) [2024-10-13 12:08:15,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:08:15,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 74 [2024-10-13 12:08:15,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:08:17,274 INFO L124 PetriNetUnfolderBase]: 5403/10775 cut-off events. [2024-10-13 12:08:17,274 INFO L125 PetriNetUnfolderBase]: For 1618/1618 co-relation queries the response was YES. [2024-10-13 12:08:17,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20079 conditions, 10775 events. 5403/10775 cut-off events. For 1618/1618 co-relation queries the response was YES. Maximal size of possible extension queue 775. Compared 105034 event pairs, 4800 based on Foata normal form. 1/8394 useless extension candidates. Maximal degree in co-relation 20069. Up to 8400 conditions per place. [2024-10-13 12:08:17,370 INFO L140 encePairwiseOnDemand]: 66/74 looper letters, 46 selfloop transitions, 7 changer transitions 2/84 dead transitions. [2024-10-13 12:08:17,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 84 transitions, 351 flow [2024-10-13 12:08:17,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 12:08:17,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 12:08:17,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 179 transitions. [2024-10-13 12:08:17,372 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6047297297297297 [2024-10-13 12:08:17,372 INFO L175 Difference]: Start difference. First operand has 73 places, 69 transitions, 204 flow. Second operand 4 states and 179 transitions. [2024-10-13 12:08:17,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 84 transitions, 351 flow [2024-10-13 12:08:17,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 84 transitions, 349 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 12:08:17,376 INFO L231 Difference]: Finished difference. Result has 77 places, 73 transitions, 248 flow [2024-10-13 12:08:17,376 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=248, PETRI_PLACES=77, PETRI_TRANSITIONS=73} [2024-10-13 12:08:17,377 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 6 predicate places. [2024-10-13 12:08:17,377 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 73 transitions, 248 flow [2024-10-13 12:08:17,377 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 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) [2024-10-13 12:08:17,377 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:08:17,377 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:08:17,378 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-13 12:08:17,378 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 13 more)] === [2024-10-13 12:08:17,378 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:08:17,378 INFO L85 PathProgramCache]: Analyzing trace with hash -877148662, now seen corresponding path program 1 times [2024-10-13 12:08:17,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:08:17,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792386896] [2024-10-13 12:08:17,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:08:17,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:08:17,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:08:17,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:08:17,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:08:17,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792386896] [2024-10-13 12:08:17,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792386896] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:08:17,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:08:17,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:08:17,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701877741] [2024-10-13 12:08:17,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:08:17,431 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:08:17,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:08:17,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:08:17,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:08:17,457 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 74 [2024-10-13 12:08:17,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 73 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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) [2024-10-13 12:08:17,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:08:17,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 74 [2024-10-13 12:08:17,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:08:18,671 INFO L124 PetriNetUnfolderBase]: 4735/9647 cut-off events. [2024-10-13 12:08:18,671 INFO L125 PetriNetUnfolderBase]: For 1681/1681 co-relation queries the response was YES. [2024-10-13 12:08:18,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18921 conditions, 9647 events. 4735/9647 cut-off events. For 1681/1681 co-relation queries the response was YES. Maximal size of possible extension queue 675. Compared 93199 event pairs, 3252 based on Foata normal form. 0/8914 useless extension candidates. Maximal degree in co-relation 18909. Up to 5776 conditions per place. [2024-10-13 12:08:18,785 INFO L140 encePairwiseOnDemand]: 70/74 looper letters, 43 selfloop transitions, 4 changer transitions 0/77 dead transitions. [2024-10-13 12:08:18,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 77 transitions, 350 flow [2024-10-13 12:08:18,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:08:18,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:08:18,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 139 transitions. [2024-10-13 12:08:18,787 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6261261261261262 [2024-10-13 12:08:18,787 INFO L175 Difference]: Start difference. First operand has 77 places, 73 transitions, 248 flow. Second operand 3 states and 139 transitions. [2024-10-13 12:08:18,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 77 transitions, 350 flow [2024-10-13 12:08:18,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 77 transitions, 342 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-13 12:08:18,798 INFO L231 Difference]: Finished difference. Result has 76 places, 71 transitions, 244 flow [2024-10-13 12:08:18,798 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=76, PETRI_TRANSITIONS=71} [2024-10-13 12:08:18,799 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 5 predicate places. [2024-10-13 12:08:18,800 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 71 transitions, 244 flow [2024-10-13 12:08:18,800 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 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) [2024-10-13 12:08:18,800 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:08:18,800 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:08:18,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-13 12:08:18,801 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 13 more)] === [2024-10-13 12:08:18,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:08:18,801 INFO L85 PathProgramCache]: Analyzing trace with hash -877148661, now seen corresponding path program 1 times [2024-10-13 12:08:18,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:08:18,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924721597] [2024-10-13 12:08:18,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:08:18,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:08:18,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:08:18,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:08:18,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:08:18,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924721597] [2024-10-13 12:08:18,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924721597] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:08:18,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:08:18,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-13 12:08:18,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672275871] [2024-10-13 12:08:18,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:08:18,940 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 12:08:18,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:08:18,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 12:08:18,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 12:08:18,991 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 74 [2024-10-13 12:08:18,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 71 transitions, 244 flow. Second operand has 5 states, 5 states have (on average 32.4) internal successors, (162), 5 states have internal predecessors, (162), 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) [2024-10-13 12:08:18,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:08:18,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 74 [2024-10-13 12:08:18,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:08:20,685 INFO L124 PetriNetUnfolderBase]: 7410/13458 cut-off events. [2024-10-13 12:08:20,686 INFO L125 PetriNetUnfolderBase]: For 2709/2709 co-relation queries the response was YES. [2024-10-13 12:08:20,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27829 conditions, 13458 events. 7410/13458 cut-off events. For 2709/2709 co-relation queries the response was YES. Maximal size of possible extension queue 954. Compared 126698 event pairs, 3132 based on Foata normal form. 0/12034 useless extension candidates. Maximal degree in co-relation 27817. Up to 5622 conditions per place. [2024-10-13 12:08:20,810 INFO L140 encePairwiseOnDemand]: 61/74 looper letters, 65 selfloop transitions, 16 changer transitions 0/108 dead transitions. [2024-10-13 12:08:20,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 108 transitions, 512 flow [2024-10-13 12:08:20,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-13 12:08:20,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-13 12:08:20,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 234 transitions. [2024-10-13 12:08:20,812 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6324324324324324 [2024-10-13 12:08:20,812 INFO L175 Difference]: Start difference. First operand has 76 places, 71 transitions, 244 flow. Second operand 5 states and 234 transitions. [2024-10-13 12:08:20,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 108 transitions, 512 flow [2024-10-13 12:08:20,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 108 transitions, 502 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:08:20,843 INFO L231 Difference]: Finished difference. Result has 81 places, 80 transitions, 339 flow [2024-10-13 12:08:20,844 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=339, PETRI_PLACES=81, PETRI_TRANSITIONS=80} [2024-10-13 12:08:20,845 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 10 predicate places. [2024-10-13 12:08:20,846 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 80 transitions, 339 flow [2024-10-13 12:08:20,846 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.4) internal successors, (162), 5 states have internal predecessors, (162), 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) [2024-10-13 12:08:20,846 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:08:20,846 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:08:20,846 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-13 12:08:20,847 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 13 more)] === [2024-10-13 12:08:20,847 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:08:20,847 INFO L85 PathProgramCache]: Analyzing trace with hash 911693631, now seen corresponding path program 1 times [2024-10-13 12:08:20,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:08:20,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183011135] [2024-10-13 12:08:20,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:08:20,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:08:20,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:08:21,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:08:21,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:08:21,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183011135] [2024-10-13 12:08:21,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183011135] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:08:21,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823112575] [2024-10-13 12:08:21,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:08:21,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:08:21,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:08:21,123 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) [2024-10-13 12:08:21,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-13 12:08:21,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:08:21,207 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-13 12:08:21,211 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:08:21,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 12:08:21,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-10-13 12:08:21,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-10-13 12:08:21,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:08:21,352 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:08:21,449 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-13 12:08:21,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:08:21,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823112575] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:08:21,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:08:21,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 11 [2024-10-13 12:08:21,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847165035] [2024-10-13 12:08:21,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:08:21,469 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-13 12:08:21,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:08:21,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-13 12:08:21,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2024-10-13 12:08:21,666 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 74 [2024-10-13 12:08:21,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 80 transitions, 339 flow. Second operand has 13 states, 13 states have (on average 33.84615384615385) internal successors, (440), 13 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:08:21,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:08:21,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 74 [2024-10-13 12:08:21,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:08:23,502 INFO L124 PetriNetUnfolderBase]: 5860/11582 cut-off events. [2024-10-13 12:08:23,502 INFO L125 PetriNetUnfolderBase]: For 3670/3670 co-relation queries the response was YES. [2024-10-13 12:08:23,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27190 conditions, 11582 events. 5860/11582 cut-off events. For 3670/3670 co-relation queries the response was YES. Maximal size of possible extension queue 813. Compared 112289 event pairs, 2776 based on Foata normal form. 8/10781 useless extension candidates. Maximal degree in co-relation 27175. Up to 3919 conditions per place. [2024-10-13 12:08:23,778 INFO L140 encePairwiseOnDemand]: 65/74 looper letters, 96 selfloop transitions, 15 changer transitions 0/140 dead transitions. [2024-10-13 12:08:23,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 140 transitions, 789 flow [2024-10-13 12:08:23,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-13 12:08:23,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-13 12:08:23,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 351 transitions. [2024-10-13 12:08:23,781 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5929054054054054 [2024-10-13 12:08:23,781 INFO L175 Difference]: Start difference. First operand has 81 places, 80 transitions, 339 flow. Second operand 8 states and 351 transitions. [2024-10-13 12:08:23,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 140 transitions, 789 flow [2024-10-13 12:08:23,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 140 transitions, 782 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-13 12:08:23,793 INFO L231 Difference]: Finished difference. Result has 90 places, 86 transitions, 414 flow [2024-10-13 12:08:23,793 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=414, PETRI_PLACES=90, PETRI_TRANSITIONS=86} [2024-10-13 12:08:23,795 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 19 predicate places. [2024-10-13 12:08:23,795 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 86 transitions, 414 flow [2024-10-13 12:08:23,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 33.84615384615385) internal successors, (440), 13 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-13 12:08:23,796 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:08:23,796 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:08:23,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-13 12:08:23,996 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,SelfDestructingSolverStorable14 [2024-10-13 12:08:23,996 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 13 more)] === [2024-10-13 12:08:23,997 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:08:23,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1126253083, now seen corresponding path program 1 times [2024-10-13 12:08:23,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:08:23,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819184406] [2024-10-13 12:08:23,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:08:23,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:08:24,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:08:24,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:08:24,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:08:24,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819184406] [2024-10-13 12:08:24,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819184406] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:08:24,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:08:24,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:08:24,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174973214] [2024-10-13 12:08:24,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:08:24,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 12:08:24,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:08:24,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 12:08:24,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 12:08:24,188 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 74 [2024-10-13 12:08:24,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 86 transitions, 414 flow. Second operand has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 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) [2024-10-13 12:08:24,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:08:24,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 74 [2024-10-13 12:08:24,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:08:25,427 INFO L124 PetriNetUnfolderBase]: 4679/10113 cut-off events. [2024-10-13 12:08:25,428 INFO L125 PetriNetUnfolderBase]: For 5433/5433 co-relation queries the response was YES. [2024-10-13 12:08:25,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24208 conditions, 10113 events. 4679/10113 cut-off events. For 5433/5433 co-relation queries the response was YES. Maximal size of possible extension queue 690. Compared 101093 event pairs, 3100 based on Foata normal form. 0/9724 useless extension candidates. Maximal degree in co-relation 24191. Up to 5414 conditions per place. [2024-10-13 12:08:25,517 INFO L140 encePairwiseOnDemand]: 70/74 looper letters, 51 selfloop transitions, 5 changer transitions 1/91 dead transitions. [2024-10-13 12:08:25,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 91 transitions, 538 flow [2024-10-13 12:08:25,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 12:08:25,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 12:08:25,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 180 transitions. [2024-10-13 12:08:25,520 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6081081081081081 [2024-10-13 12:08:25,520 INFO L175 Difference]: Start difference. First operand has 90 places, 86 transitions, 414 flow. Second operand 4 states and 180 transitions. [2024-10-13 12:08:25,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 91 transitions, 538 flow [2024-10-13 12:08:25,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 91 transitions, 522 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-10-13 12:08:25,538 INFO L231 Difference]: Finished difference. Result has 90 places, 84 transitions, 400 flow [2024-10-13 12:08:25,539 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=400, PETRI_PLACES=90, PETRI_TRANSITIONS=84} [2024-10-13 12:08:25,540 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 19 predicate places. [2024-10-13 12:08:25,540 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 84 transitions, 400 flow [2024-10-13 12:08:25,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 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) [2024-10-13 12:08:25,540 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:08:25,541 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:08:25,541 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-10-13 12:08:25,541 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 13 more)] === [2024-10-13 12:08:25,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:08:25,542 INFO L85 PathProgramCache]: Analyzing trace with hash -592943848, now seen corresponding path program 1 times [2024-10-13 12:08:25,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:08:25,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691494383] [2024-10-13 12:08:25,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:08:25,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:08:25,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:08:25,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:08:25,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:08:25,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691494383] [2024-10-13 12:08:25,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691494383] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:08:25,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737060844] [2024-10-13 12:08:25,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:08:25,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:08:25,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:08:25,776 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) [2024-10-13 12:08:25,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-13 12:08:25,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:08:25,858 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-13 12:08:25,860 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:08:25,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 12:08:25,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2024-10-13 12:08:25,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-10-13 12:08:26,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:08:26,108 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:08:26,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:08:26,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737060844] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:08:26,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:08:26,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2024-10-13 12:08:26,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223516055] [2024-10-13 12:08:26,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:08:26,325 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-13 12:08:26,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:08:26,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-13 12:08:26,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-13 12:08:26,555 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 74 [2024-10-13 12:08:26,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 84 transitions, 400 flow. Second operand has 14 states, 14 states have (on average 32.714285714285715) internal successors, (458), 14 states have internal predecessors, (458), 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) [2024-10-13 12:08:26,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:08:26,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 74 [2024-10-13 12:08:26,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:08:28,077 INFO L124 PetriNetUnfolderBase]: 5885/11066 cut-off events. [2024-10-13 12:08:28,077 INFO L125 PetriNetUnfolderBase]: For 5466/5466 co-relation queries the response was YES. [2024-10-13 12:08:28,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27703 conditions, 11066 events. 5885/11066 cut-off events. For 5466/5466 co-relation queries the response was YES. Maximal size of possible extension queue 787. Compared 101871 event pairs, 1676 based on Foata normal form. 364/11048 useless extension candidates. Maximal degree in co-relation 27685. Up to 3259 conditions per place. [2024-10-13 12:08:28,309 INFO L140 encePairwiseOnDemand]: 61/74 looper letters, 83 selfloop transitions, 27 changer transitions 1/138 dead transitions. [2024-10-13 12:08:28,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 138 transitions, 816 flow [2024-10-13 12:08:28,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-13 12:08:28,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-13 12:08:28,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 321 transitions. [2024-10-13 12:08:28,312 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6196911196911197 [2024-10-13 12:08:28,312 INFO L175 Difference]: Start difference. First operand has 90 places, 84 transitions, 400 flow. Second operand 7 states and 321 transitions. [2024-10-13 12:08:28,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 138 transitions, 816 flow [2024-10-13 12:08:28,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 138 transitions, 800 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-10-13 12:08:28,358 INFO L231 Difference]: Finished difference. Result has 91 places, 88 transitions, 464 flow [2024-10-13 12:08:28,358 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=464, PETRI_PLACES=91, PETRI_TRANSITIONS=88} [2024-10-13 12:08:28,358 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 20 predicate places. [2024-10-13 12:08:28,359 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 88 transitions, 464 flow [2024-10-13 12:08:28,359 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 32.714285714285715) internal successors, (458), 14 states have internal predecessors, (458), 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) [2024-10-13 12:08:28,359 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:08:28,359 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:08:28,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-13 12:08:28,563 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:08:28,564 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 13 more)] === [2024-10-13 12:08:28,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:08:28,564 INFO L85 PathProgramCache]: Analyzing trace with hash -4010258, now seen corresponding path program 1 times [2024-10-13 12:08:28,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:08:28,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406212261] [2024-10-13 12:08:28,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:08:28,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:08:28,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:08:28,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:08:28,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:08:28,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406212261] [2024-10-13 12:08:28,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406212261] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-13 12:08:28,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177602258] [2024-10-13 12:08:28,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:08:28,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-13 12:08:28,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-13 12:08:28,792 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) [2024-10-13 12:08:28,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-13 12:08:28,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:08:28,871 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-13 12:08:28,873 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-13 12:08:28,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 9 [2024-10-13 12:08:28,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-13 12:08:28,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2024-10-13 12:08:29,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:08:29,088 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-13 12:08:29,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:08:29,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177602258] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-13 12:08:29,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-13 12:08:29,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-10-13 12:08:29,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349041178] [2024-10-13 12:08:29,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-13 12:08:29,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-13 12:08:29,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:08:29,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-13 12:08:29,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2024-10-13 12:08:29,591 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 74 [2024-10-13 12:08:29,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 88 transitions, 464 flow. Second operand has 17 states, 17 states have (on average 32.588235294117645) internal successors, (554), 17 states have internal predecessors, (554), 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) [2024-10-13 12:08:29,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:08:29,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 74 [2024-10-13 12:08:29,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:08:31,630 INFO L124 PetriNetUnfolderBase]: 6951/11959 cut-off events. [2024-10-13 12:08:31,630 INFO L125 PetriNetUnfolderBase]: For 6662/6662 co-relation queries the response was YES. [2024-10-13 12:08:31,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31223 conditions, 11959 events. 6951/11959 cut-off events. For 6662/6662 co-relation queries the response was YES. Maximal size of possible extension queue 880. Compared 104788 event pairs, 1872 based on Foata normal form. 355/12035 useless extension candidates. Maximal degree in co-relation 31205. Up to 4060 conditions per place. [2024-10-13 12:08:31,751 INFO L140 encePairwiseOnDemand]: 58/74 looper letters, 74 selfloop transitions, 28 changer transitions 13/143 dead transitions. [2024-10-13 12:08:31,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 143 transitions, 884 flow [2024-10-13 12:08:31,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-13 12:08:31,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-13 12:08:31,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 415 transitions. [2024-10-13 12:08:31,754 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5608108108108109 [2024-10-13 12:08:31,755 INFO L175 Difference]: Start difference. First operand has 91 places, 88 transitions, 464 flow. Second operand 10 states and 415 transitions. [2024-10-13 12:08:31,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 143 transitions, 884 flow [2024-10-13 12:08:31,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 143 transitions, 838 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-10-13 12:08:31,783 INFO L231 Difference]: Finished difference. Result has 96 places, 86 transitions, 483 flow [2024-10-13 12:08:31,784 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=483, PETRI_PLACES=96, PETRI_TRANSITIONS=86} [2024-10-13 12:08:31,784 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 25 predicate places. [2024-10-13 12:08:31,784 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 86 transitions, 483 flow [2024-10-13 12:08:31,785 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 32.588235294117645) internal successors, (554), 17 states have internal predecessors, (554), 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) [2024-10-13 12:08:31,785 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:08:31,785 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1] [2024-10-13 12:08:31,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-13 12:08:31,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-10-13 12:08:31,986 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 13 more)] === [2024-10-13 12:08:31,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:08:31,987 INFO L85 PathProgramCache]: Analyzing trace with hash 553802707, now seen corresponding path program 1 times [2024-10-13 12:08:31,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:08:31,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072925488] [2024-10-13 12:08:31,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:08:31,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:08:32,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:08:32,007 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-13 12:08:32,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-13 12:08:32,025 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-13 12:08:32,026 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-13 12:08:32,026 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (15 of 16 remaining) [2024-10-13 12:08:32,027 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (14 of 16 remaining) [2024-10-13 12:08:32,027 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX (13 of 16 remaining) [2024-10-13 12:08:32,027 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (12 of 16 remaining) [2024-10-13 12:08:32,027 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 16 remaining) [2024-10-13 12:08:32,027 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 16 remaining) [2024-10-13 12:08:32,027 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 16 remaining) [2024-10-13 12:08:32,028 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 16 remaining) [2024-10-13 12:08:32,028 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 16 remaining) [2024-10-13 12:08:32,028 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 16 remaining) [2024-10-13 12:08:32,028 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 16 remaining) [2024-10-13 12:08:32,028 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 16 remaining) [2024-10-13 12:08:32,028 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK (3 of 16 remaining) [2024-10-13 12:08:32,028 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 16 remaining) [2024-10-13 12:08:32,028 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 16 remaining) [2024-10-13 12:08:32,029 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 16 remaining) [2024-10-13 12:08:32,029 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-10-13 12:08:32,029 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:08:32,030 WARN L239 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-13 12:08:32,030 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-13 12:08:32,056 INFO L143 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2024-10-13 12:08:32,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 92 transitions, 256 flow [2024-10-13 12:08:32,161 INFO L124 PetriNetUnfolderBase]: 350/1531 cut-off events. [2024-10-13 12:08:32,161 INFO L125 PetriNetUnfolderBase]: For 419/431 co-relation queries the response was YES. [2024-10-13 12:08:32,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1967 conditions, 1531 events. 350/1531 cut-off events. For 419/431 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 11428 event pairs, 32 based on Foata normal form. 0/995 useless extension candidates. Maximal degree in co-relation 984. Up to 192 conditions per place. [2024-10-13 12:08:32,171 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 92 transitions, 256 flow [2024-10-13 12:08:32,179 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 92 transitions, 256 flow [2024-10-13 12:08:32,180 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-13 12:08:32,180 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;@71f3b920, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-13 12:08:32,181 INFO L334 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2024-10-13 12:08:32,182 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-13 12:08:32,182 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-10-13 12:08:32,182 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-13 12:08:32,182 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:08:32,182 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-10-13 12:08:32,182 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 14 more)] === [2024-10-13 12:08:32,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:08:32,182 INFO L85 PathProgramCache]: Analyzing trace with hash 17370536, now seen corresponding path program 1 times [2024-10-13 12:08:32,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:08:32,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333555556] [2024-10-13 12:08:32,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:08:32,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:08:32,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:08:32,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:08:32,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:08:32,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333555556] [2024-10-13 12:08:32,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333555556] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:08:32,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:08:32,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-13 12:08:32,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716970847] [2024-10-13 12:08:32,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:08:32,192 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-13 12:08:32,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:08:32,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-13 12:08:32,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-13 12:08:32,193 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 92 [2024-10-13 12:08:32,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 92 transitions, 256 flow. Second operand has 2 states, 2 states have (on average 45.0) internal successors, (90), 2 states have internal predecessors, (90), 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) [2024-10-13 12:08:32,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:08:32,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 92 [2024-10-13 12:08:32,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:08:38,405 INFO L124 PetriNetUnfolderBase]: 34066/64642 cut-off events. [2024-10-13 12:08:38,405 INFO L125 PetriNetUnfolderBase]: For 20374/20374 co-relation queries the response was YES. [2024-10-13 12:08:38,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117260 conditions, 64642 events. 34066/64642 cut-off events. For 20374/20374 co-relation queries the response was YES. Maximal size of possible extension queue 2941. Compared 710301 event pairs, 29642 based on Foata normal form. 8875/62909 useless extension candidates. Maximal degree in co-relation 36918. Up to 45834 conditions per place. [2024-10-13 12:08:38,880 INFO L140 encePairwiseOnDemand]: 86/92 looper letters, 42 selfloop transitions, 0 changer transitions 0/86 dead transitions. [2024-10-13 12:08:38,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 86 transitions, 328 flow [2024-10-13 12:08:38,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-13 12:08:38,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-13 12:08:38,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 136 transitions. [2024-10-13 12:08:38,881 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7391304347826086 [2024-10-13 12:08:38,881 INFO L175 Difference]: Start difference. First operand has 88 places, 92 transitions, 256 flow. Second operand 2 states and 136 transitions. [2024-10-13 12:08:38,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 86 transitions, 328 flow [2024-10-13 12:08:38,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 86 transitions, 328 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 12:08:38,890 INFO L231 Difference]: Finished difference. Result has 87 places, 86 transitions, 244 flow [2024-10-13 12:08:38,891 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=244, PETRI_PLACES=87, PETRI_TRANSITIONS=86} [2024-10-13 12:08:38,891 INFO L277 CegarLoopForPetriNet]: 88 programPoint places, -1 predicate places. [2024-10-13 12:08:38,891 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 86 transitions, 244 flow [2024-10-13 12:08:38,892 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 45.0) internal successors, (90), 2 states have internal predecessors, (90), 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) [2024-10-13 12:08:38,892 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:08:38,892 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-13 12:08:38,892 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-10-13 12:08:38,892 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 14 more)] === [2024-10-13 12:08:38,893 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:08:38,893 INFO L85 PathProgramCache]: Analyzing trace with hash 538549544, now seen corresponding path program 1 times [2024-10-13 12:08:38,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:08:38,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278516978] [2024-10-13 12:08:38,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:08:38,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:08:38,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:08:38,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:08:38,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:08:38,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278516978] [2024-10-13 12:08:38,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278516978] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:08:38,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:08:38,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-13 12:08:38,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118865611] [2024-10-13 12:08:38,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:08:38,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-13 12:08:38,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:08:38,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-13 12:08:38,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-13 12:08:38,954 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 92 [2024-10-13 12:08:38,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 86 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 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) [2024-10-13 12:08:38,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:08:38,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 92 [2024-10-13 12:08:38,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:08:44,666 INFO L124 PetriNetUnfolderBase]: 38403/66237 cut-off events. [2024-10-13 12:08:44,666 INFO L125 PetriNetUnfolderBase]: For 14309/14309 co-relation queries the response was YES. [2024-10-13 12:08:44,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124936 conditions, 66237 events. 38403/66237 cut-off events. For 14309/14309 co-relation queries the response was YES. Maximal size of possible extension queue 3058. Compared 660337 event pairs, 26932 based on Foata normal form. 0/59108 useless extension candidates. Maximal degree in co-relation 124927. Up to 39814 conditions per place. [2024-10-13 12:08:45,203 INFO L140 encePairwiseOnDemand]: 88/92 looper letters, 51 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2024-10-13 12:08:45,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 93 transitions, 364 flow [2024-10-13 12:08:45,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-13 12:08:45,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-13 12:08:45,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 175 transitions. [2024-10-13 12:08:45,205 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6340579710144928 [2024-10-13 12:08:45,205 INFO L175 Difference]: Start difference. First operand has 87 places, 86 transitions, 244 flow. Second operand 3 states and 175 transitions. [2024-10-13 12:08:45,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 93 transitions, 364 flow [2024-10-13 12:08:45,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 93 transitions, 364 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-13 12:08:45,215 INFO L231 Difference]: Finished difference. Result has 87 places, 84 transitions, 244 flow [2024-10-13 12:08:45,215 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=87, PETRI_TRANSITIONS=84} [2024-10-13 12:08:45,216 INFO L277 CegarLoopForPetriNet]: 88 programPoint places, -1 predicate places. [2024-10-13 12:08:45,216 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 84 transitions, 244 flow [2024-10-13 12:08:45,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 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) [2024-10-13 12:08:45,216 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:08:45,216 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-13 12:08:45,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-10-13 12:08:45,217 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 14 more)] === [2024-10-13 12:08:45,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:08:45,217 INFO L85 PathProgramCache]: Analyzing trace with hash 538549545, now seen corresponding path program 1 times [2024-10-13 12:08:45,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:08:45,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320536628] [2024-10-13 12:08:45,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:08:45,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:08:45,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:08:45,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:08:45,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:08:45,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320536628] [2024-10-13 12:08:45,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320536628] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:08:45,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:08:45,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 12:08:45,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154501346] [2024-10-13 12:08:45,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:08:45,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-13 12:08:45,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:08:45,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-13 12:08:45,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-13 12:08:45,388 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 92 [2024-10-13 12:08:45,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 84 transitions, 244 flow. Second operand has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 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) [2024-10-13 12:08:45,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:08:45,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 92 [2024-10-13 12:08:45,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-13 12:08:58,499 INFO L124 PetriNetUnfolderBase]: 76586/133916 cut-off events. [2024-10-13 12:08:58,499 INFO L125 PetriNetUnfolderBase]: For 40604/40604 co-relation queries the response was YES. [2024-10-13 12:08:59,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254376 conditions, 133916 events. 76586/133916 cut-off events. For 40604/40604 co-relation queries the response was YES. Maximal size of possible extension queue 6129. Compared 1480225 event pairs, 63128 based on Foata normal form. 1/119529 useless extension candidates. Maximal degree in co-relation 254366. Up to 51913 conditions per place. [2024-10-13 12:08:59,981 INFO L140 encePairwiseOnDemand]: 86/92 looper letters, 84 selfloop transitions, 4 changer transitions 0/128 dead transitions. [2024-10-13 12:08:59,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 128 transitions, 578 flow [2024-10-13 12:08:59,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-13 12:08:59,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-13 12:08:59,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 258 transitions. [2024-10-13 12:08:59,983 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7010869565217391 [2024-10-13 12:08:59,983 INFO L175 Difference]: Start difference. First operand has 87 places, 84 transitions, 244 flow. Second operand 4 states and 258 transitions. [2024-10-13 12:08:59,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 128 transitions, 578 flow [2024-10-13 12:09:00,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 128 transitions, 570 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-13 12:09:00,983 INFO L231 Difference]: Finished difference. Result has 90 places, 86 transitions, 266 flow [2024-10-13 12:09:00,983 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=266, PETRI_PLACES=90, PETRI_TRANSITIONS=86} [2024-10-13 12:09:00,984 INFO L277 CegarLoopForPetriNet]: 88 programPoint places, 2 predicate places. [2024-10-13 12:09:00,984 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 86 transitions, 266 flow [2024-10-13 12:09:00,984 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 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) [2024-10-13 12:09:00,984 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-13 12:09:00,984 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-13 12:09:00,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-10-13 12:09:00,984 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [checkThreadErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (and 14 more)] === [2024-10-13 12:09:00,984 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-13 12:09:00,985 INFO L85 PathProgramCache]: Analyzing trace with hash 368329384, now seen corresponding path program 1 times [2024-10-13 12:09:00,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-13 12:09:00,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628973987] [2024-10-13 12:09:00,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-13 12:09:00,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-13 12:09:01,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-13 12:09:01,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-13 12:09:01,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-13 12:09:01,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628973987] [2024-10-13 12:09:01,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628973987] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-13 12:09:01,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-13 12:09:01,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-13 12:09:01,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522110181] [2024-10-13 12:09:01,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-13 12:09:01,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-13 12:09:01,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-13 12:09:01,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-13 12:09:01,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-13 12:09:01,126 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 92 [2024-10-13 12:09:01,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 86 transitions, 266 flow. Second operand has 4 states, 4 states have (on average 40.5) internal successors, (162), 4 states have internal predecessors, (162), 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) [2024-10-13 12:09:01,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-13 12:09:01,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 92 [2024-10-13 12:09:01,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand