./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/queue_longest.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ba3324-a2e7-442a-83b2-ea4d31b29fd7/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ba3324-a2e7-442a-83b2-ea4d31b29fd7/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ba3324-a2e7-442a-83b2-ea4d31b29fd7/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ba3324-a2e7-442a-83b2-ea4d31b29fd7/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/queue_longest.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ba3324-a2e7-442a-83b2-ea4d31b29fd7/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ba3324-a2e7-442a-83b2-ea4d31b29fd7/bin/uautomizer-verify-uCwYo4JHxu --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 5fb3c623242420f3b3352ce2377df781fcc1efd56f82dd0011f9620e127821b3 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:01:21,330 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:01:21,447 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ba3324-a2e7-442a-83b2-ea4d31b29fd7/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 08:01:21,453 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:01:21,457 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:01:21,494 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:01:21,495 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:01:21,496 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:01:21,496 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:01:21,497 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:01:21,498 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:01:21,499 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:01:21,499 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:01:21,500 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:01:21,501 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:01:21,501 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:01:21,502 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:01:21,502 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:01:21,503 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 08:01:21,504 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 08:01:21,504 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 08:01:21,505 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:01:21,506 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 08:01:21,506 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 08:01:21,507 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:01:21,507 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:01:21,508 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:01:21,508 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:01:21,509 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:01:21,510 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:01:21,510 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:01:21,511 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:01:21,511 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:01:21,512 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:01:21,512 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:01:21,513 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:01:21,513 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:01:21,514 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:01:21,514 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ba3324-a2e7-442a-83b2-ea4d31b29fd7/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ba3324-a2e7-442a-83b2-ea4d31b29fd7/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fb3c623242420f3b3352ce2377df781fcc1efd56f82dd0011f9620e127821b3 [2023-11-19 08:01:21,835 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:01:21,886 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:01:21,889 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:01:21,892 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:01:21,893 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:01:21,894 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ba3324-a2e7-442a-83b2-ea4d31b29fd7/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread/queue_longest.i [2023-11-19 08:01:25,099 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:01:25,422 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:01:25,423 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ba3324-a2e7-442a-83b2-ea4d31b29fd7/sv-benchmarks/c/pthread/queue_longest.i [2023-11-19 08:01:25,468 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ba3324-a2e7-442a-83b2-ea4d31b29fd7/bin/uautomizer-verify-uCwYo4JHxu/data/ff6a50730/73ea045f678d41eeb1eb2dc0839bd115/FLAG96428a119 [2023-11-19 08:01:25,481 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ba3324-a2e7-442a-83b2-ea4d31b29fd7/bin/uautomizer-verify-uCwYo4JHxu/data/ff6a50730/73ea045f678d41eeb1eb2dc0839bd115 [2023-11-19 08:01:25,484 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:01:25,485 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:01:25,487 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:01:25,487 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:01:25,492 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:01:25,494 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:01:25" (1/1) ... [2023-11-19 08:01:25,495 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7403ebbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:25, skipping insertion in model container [2023-11-19 08:01:25,495 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:01:25" (1/1) ... [2023-11-19 08:01:25,549 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:01:26,121 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:01:26,134 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:01:26,185 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:01:26,336 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:01:26,336 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:26 WrapperNode [2023-11-19 08:01:26,337 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:01:26,338 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:01:26,338 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:01:26,338 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:01:26,346 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:26" (1/1) ... [2023-11-19 08:01:26,382 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:26" (1/1) ... [2023-11-19 08:01:26,428 INFO L138 Inliner]: procedures = 274, calls = 63, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 251 [2023-11-19 08:01:26,429 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:01:26,430 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:01:26,430 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:01:26,430 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:01:26,440 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:26" (1/1) ... [2023-11-19 08:01:26,440 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:26" (1/1) ... [2023-11-19 08:01:26,447 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:26" (1/1) ... [2023-11-19 08:01:26,447 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:26" (1/1) ... [2023-11-19 08:01:26,460 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:26" (1/1) ... [2023-11-19 08:01:26,464 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:26" (1/1) ... [2023-11-19 08:01:26,467 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:26" (1/1) ... [2023-11-19 08:01:26,470 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:26" (1/1) ... [2023-11-19 08:01:26,475 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:01:26,476 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:01:26,476 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:01:26,476 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:01:26,477 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:26" (1/1) ... [2023-11-19 08:01:26,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:01:26,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ba3324-a2e7-442a-83b2-ea4d31b29fd7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:01:26,512 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ba3324-a2e7-442a-83b2-ea4d31b29fd7/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:01:26,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c3ba3324-a2e7-442a-83b2-ea4d31b29fd7/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:01:26,548 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-19 08:01:26,548 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-19 08:01:26,549 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-19 08:01:26,549 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-19 08:01:26,549 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 08:01:26,549 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 08:01:26,549 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 08:01:26,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 08:01:26,550 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 08:01:26,550 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:01:26,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:01:26,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:01:26,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:01:26,554 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 08:01:26,795 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:01:26,797 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:01:27,486 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:01:27,513 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:01:27,513 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 08:01:27,525 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:01:27 BoogieIcfgContainer [2023-11-19 08:01:27,526 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:01:27,529 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:01:27,529 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:01:27,532 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:01:27,532 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:01:25" (1/3) ... [2023-11-19 08:01:27,533 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c59d9c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:01:27, skipping insertion in model container [2023-11-19 08:01:27,533 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:01:26" (2/3) ... [2023-11-19 08:01:27,534 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c59d9c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:01:27, skipping insertion in model container [2023-11-19 08:01:27,536 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:01:27" (3/3) ... [2023-11-19 08:01:27,537 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_longest.i [2023-11-19 08:01:27,561 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:01:27,561 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 80 error locations. [2023-11-19 08:01:27,561 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 08:01:27,734 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 08:01:27,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 354 places, 365 transitions, 744 flow [2023-11-19 08:01:27,946 INFO L124 PetriNetUnfolderBase]: 18/363 cut-off events. [2023-11-19 08:01:27,946 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 08:01:27,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372 conditions, 363 events. 18/363 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 808 event pairs, 0 based on Foata normal form. 0/265 useless extension candidates. Maximal degree in co-relation 263. Up to 2 conditions per place. [2023-11-19 08:01:27,963 INFO L82 GeneralOperation]: Start removeDead. Operand has 354 places, 365 transitions, 744 flow [2023-11-19 08:01:27,983 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 347 places, 358 transitions, 728 flow [2023-11-19 08:01:27,989 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:01:28,012 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 347 places, 358 transitions, 728 flow [2023-11-19 08:01:28,016 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 347 places, 358 transitions, 728 flow [2023-11-19 08:01:28,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 347 places, 358 transitions, 728 flow [2023-11-19 08:01:28,157 INFO L124 PetriNetUnfolderBase]: 18/358 cut-off events. [2023-11-19 08:01:28,157 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 08:01:28,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 358 events. 18/358 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 794 event pairs, 0 based on Foata normal form. 0/261 useless extension candidates. Maximal degree in co-relation 263. Up to 2 conditions per place. [2023-11-19 08:01:28,187 INFO L119 LiptonReduction]: Number of co-enabled transitions 33180 [2023-11-19 08:01:44,638 INFO L134 LiptonReduction]: Checked pairs total: 127086 [2023-11-19 08:01:44,639 INFO L136 LiptonReduction]: Total number of compositions: 467 [2023-11-19 08:01:44,656 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:01:44,663 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@f694d6e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:01:44,664 INFO L358 AbstractCegarLoop]: Starting to check reachability of 142 error locations. [2023-11-19 08:01:44,666 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:01:44,666 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-11-19 08:01:44,666 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:01:44,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:44,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-19 08:01:44,668 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-19 08:01:44,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:44,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1552, now seen corresponding path program 1 times [2023-11-19 08:01:44,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:44,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363335132] [2023-11-19 08:01:44,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:44,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:44,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:44,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:44,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:44,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363335132] [2023-11-19 08:01:44,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363335132] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:44,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:44,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-19 08:01:44,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404548986] [2023-11-19 08:01:44,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:44,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 08:01:44,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:44,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 08:01:44,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 08:01:44,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 349 out of 832 [2023-11-19 08:01:44,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 145 transitions, 302 flow. Second operand has 2 states, 2 states have (on average 349.5) internal successors, (699), 2 states have internal predecessors, (699), 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) [2023-11-19 08:01:44,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:44,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 349 of 832 [2023-11-19 08:01:44,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:01:46,883 INFO L124 PetriNetUnfolderBase]: 8425/13445 cut-off events. [2023-11-19 08:01:46,884 INFO L125 PetriNetUnfolderBase]: For 70/70 co-relation queries the response was YES. [2023-11-19 08:01:46,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26356 conditions, 13445 events. 8425/13445 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 79351 event pairs, 7385 based on Foata normal form. 180/7268 useless extension candidates. Maximal degree in co-relation 25917. Up to 12793 conditions per place. [2023-11-19 08:01:47,000 INFO L140 encePairwiseOnDemand]: 782/832 looper letters, 87 selfloop transitions, 0 changer transitions 0/95 dead transitions. [2023-11-19 08:01:47,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 95 transitions, 376 flow [2023-11-19 08:01:47,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 08:01:47,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 08:01:47,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 835 transitions. [2023-11-19 08:01:47,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5018028846153846 [2023-11-19 08:01:47,025 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 835 transitions. [2023-11-19 08:01:47,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 835 transitions. [2023-11-19 08:01:47,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:01:47,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 835 transitions. [2023-11-19 08:01:47,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 417.5) internal successors, (835), 2 states have internal predecessors, (835), 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) [2023-11-19 08:01:47,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 832.0) internal successors, (2496), 3 states have internal predecessors, (2496), 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) [2023-11-19 08:01:47,054 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 832.0) internal successors, (2496), 3 states have internal predecessors, (2496), 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) [2023-11-19 08:01:47,057 INFO L175 Difference]: Start difference. First operand has 141 places, 145 transitions, 302 flow. Second operand 2 states and 835 transitions. [2023-11-19 08:01:47,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 95 transitions, 376 flow [2023-11-19 08:01:47,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 95 transitions, 368 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 08:01:47,069 INFO L231 Difference]: Finished difference. Result has 91 places, 95 transitions, 194 flow [2023-11-19 08:01:47,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=832, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=194, PETRI_PLACES=91, PETRI_TRANSITIONS=95} [2023-11-19 08:01:47,077 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -50 predicate places. [2023-11-19 08:01:47,077 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 95 transitions, 194 flow [2023-11-19 08:01:47,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 349.5) internal successors, (699), 2 states have internal predecessors, (699), 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) [2023-11-19 08:01:47,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:47,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 08:01:47,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 08:01:47,080 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-19 08:01:47,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:47,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1528472, now seen corresponding path program 1 times [2023-11-19 08:01:47,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:47,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083249924] [2023-11-19 08:01:47,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:47,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:47,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:47,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:47,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:47,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083249924] [2023-11-19 08:01:47,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083249924] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:47,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:47,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:01:47,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383900759] [2023-11-19 08:01:47,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:47,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:01:47,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:47,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:01:47,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:01:47,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 832 [2023-11-19 08:01:47,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 95 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 344.0) internal successors, (1032), 3 states have internal predecessors, (1032), 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) [2023-11-19 08:01:47,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:47,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 832 [2023-11-19 08:01:47,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:01:49,319 INFO L124 PetriNetUnfolderBase]: 8351/13299 cut-off events. [2023-11-19 08:01:49,319 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 08:01:49,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25998 conditions, 13299 events. 8351/13299 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 78129 event pairs, 7319 based on Foata normal form. 0/7042 useless extension candidates. Maximal degree in co-relation 25995. Up to 12650 conditions per place. [2023-11-19 08:01:49,484 INFO L140 encePairwiseOnDemand]: 828/832 looper letters, 83 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2023-11-19 08:01:49,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 93 transitions, 360 flow [2023-11-19 08:01:49,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:01:49,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:01:49,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1116 transitions. [2023-11-19 08:01:49,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44711538461538464 [2023-11-19 08:01:49,490 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1116 transitions. [2023-11-19 08:01:49,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1116 transitions. [2023-11-19 08:01:49,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:01:49,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1116 transitions. [2023-11-19 08:01:49,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 372.0) internal successors, (1116), 3 states have internal predecessors, (1116), 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) [2023-11-19 08:01:49,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 832.0) internal successors, (3328), 4 states have internal predecessors, (3328), 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) [2023-11-19 08:01:49,506 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 832.0) internal successors, (3328), 4 states have internal predecessors, (3328), 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) [2023-11-19 08:01:49,506 INFO L175 Difference]: Start difference. First operand has 91 places, 95 transitions, 194 flow. Second operand 3 states and 1116 transitions. [2023-11-19 08:01:49,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 93 transitions, 360 flow [2023-11-19 08:01:49,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 93 transitions, 360 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 08:01:49,510 INFO L231 Difference]: Finished difference. Result has 91 places, 93 transitions, 194 flow [2023-11-19 08:01:49,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=832, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=91, PETRI_TRANSITIONS=93} [2023-11-19 08:01:49,512 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -50 predicate places. [2023-11-19 08:01:49,512 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 93 transitions, 194 flow [2023-11-19 08:01:49,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 344.0) internal successors, (1032), 3 states have internal predecessors, (1032), 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) [2023-11-19 08:01:49,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:49,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 08:01:49,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 08:01:49,515 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-19 08:01:49,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:49,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1528474, now seen corresponding path program 1 times [2023-11-19 08:01:49,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:49,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557296029] [2023-11-19 08:01:49,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:49,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:49,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:49,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:49,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:49,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557296029] [2023-11-19 08:01:49,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557296029] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:49,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:49,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:01:49,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505428415] [2023-11-19 08:01:49,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:49,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:01:49,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:49,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:01:49,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:01:49,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 339 out of 832 [2023-11-19 08:01:49,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 93 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 340.0) internal successors, (1020), 3 states have internal predecessors, (1020), 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) [2023-11-19 08:01:49,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:49,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 339 of 832 [2023-11-19 08:01:49,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:01:51,593 INFO L124 PetriNetUnfolderBase]: 8277/13153 cut-off events. [2023-11-19 08:01:51,594 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 08:01:51,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25714 conditions, 13153 events. 8277/13153 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 76995 event pairs, 7253 based on Foata normal form. 0/6996 useless extension candidates. Maximal degree in co-relation 25710. Up to 12509 conditions per place. [2023-11-19 08:01:51,664 INFO L140 encePairwiseOnDemand]: 828/832 looper letters, 81 selfloop transitions, 2 changer transitions 0/91 dead transitions. [2023-11-19 08:01:51,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 91 transitions, 356 flow [2023-11-19 08:01:51,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:01:51,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:01:51,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1102 transitions. [2023-11-19 08:01:51,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44150641025641024 [2023-11-19 08:01:51,670 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1102 transitions. [2023-11-19 08:01:51,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1102 transitions. [2023-11-19 08:01:51,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:01:51,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1102 transitions. [2023-11-19 08:01:51,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 367.3333333333333) internal successors, (1102), 3 states have internal predecessors, (1102), 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) [2023-11-19 08:01:51,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 832.0) internal successors, (3328), 4 states have internal predecessors, (3328), 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) [2023-11-19 08:01:51,685 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 832.0) internal successors, (3328), 4 states have internal predecessors, (3328), 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) [2023-11-19 08:01:51,686 INFO L175 Difference]: Start difference. First operand has 91 places, 93 transitions, 194 flow. Second operand 3 states and 1102 transitions. [2023-11-19 08:01:51,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 91 transitions, 356 flow [2023-11-19 08:01:51,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 91 transitions, 352 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:01:51,693 INFO L231 Difference]: Finished difference. Result has 89 places, 91 transitions, 190 flow [2023-11-19 08:01:51,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=832, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=89, PETRI_TRANSITIONS=91} [2023-11-19 08:01:51,696 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -52 predicate places. [2023-11-19 08:01:51,697 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 91 transitions, 190 flow [2023-11-19 08:01:51,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 340.0) internal successors, (1020), 3 states have internal predecessors, (1020), 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) [2023-11-19 08:01:51,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:51,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 08:01:51,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 08:01:51,699 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-19 08:01:51,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:51,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1528550, now seen corresponding path program 1 times [2023-11-19 08:01:51,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:51,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414345015] [2023-11-19 08:01:51,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:51,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:51,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:51,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:51,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:51,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414345015] [2023-11-19 08:01:51,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414345015] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:51,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:51,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:01:51,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043395073] [2023-11-19 08:01:51,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:51,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:01:51,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:51,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:01:51,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:01:52,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 347 out of 832 [2023-11-19 08:01:52,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 91 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 348.0) internal successors, (1044), 3 states have internal predecessors, (1044), 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) [2023-11-19 08:01:52,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:52,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 347 of 832 [2023-11-19 08:01:52,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:01:53,278 INFO L124 PetriNetUnfolderBase]: 7267/11553 cut-off events. [2023-11-19 08:01:53,279 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 08:01:53,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22554 conditions, 11553 events. 7267/11553 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 66139 event pairs, 6311 based on Foata normal form. 0/6470 useless extension candidates. Maximal degree in co-relation 22550. Up to 10954 conditions per place. [2023-11-19 08:01:53,345 INFO L140 encePairwiseOnDemand]: 826/832 looper letters, 77 selfloop transitions, 1 changer transitions 0/86 dead transitions. [2023-11-19 08:01:53,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 86 transitions, 336 flow [2023-11-19 08:01:53,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:01:53,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:01:53,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1124 transitions. [2023-11-19 08:01:53,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45032051282051283 [2023-11-19 08:01:53,351 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1124 transitions. [2023-11-19 08:01:53,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1124 transitions. [2023-11-19 08:01:53,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:01:53,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1124 transitions. [2023-11-19 08:01:53,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 374.6666666666667) internal successors, (1124), 3 states have internal predecessors, (1124), 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) [2023-11-19 08:01:53,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 832.0) internal successors, (3328), 4 states have internal predecessors, (3328), 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) [2023-11-19 08:01:53,365 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 832.0) internal successors, (3328), 4 states have internal predecessors, (3328), 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) [2023-11-19 08:01:53,366 INFO L175 Difference]: Start difference. First operand has 89 places, 91 transitions, 190 flow. Second operand 3 states and 1124 transitions. [2023-11-19 08:01:53,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 86 transitions, 336 flow [2023-11-19 08:01:53,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 86 transitions, 332 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:01:53,369 INFO L231 Difference]: Finished difference. Result has 84 places, 86 transitions, 178 flow [2023-11-19 08:01:53,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=832, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=84, PETRI_TRANSITIONS=86} [2023-11-19 08:01:53,370 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -57 predicate places. [2023-11-19 08:01:53,370 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 86 transitions, 178 flow [2023-11-19 08:01:53,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 348.0) internal successors, (1044), 3 states have internal predecessors, (1044), 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) [2023-11-19 08:01:53,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:53,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 08:01:53,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 08:01:53,372 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-19 08:01:53,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:53,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1528551, now seen corresponding path program 1 times [2023-11-19 08:01:53,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:53,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847883338] [2023-11-19 08:01:53,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:53,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:53,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:53,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:53,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:53,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847883338] [2023-11-19 08:01:53,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847883338] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:53,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:53,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:01:53,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55928808] [2023-11-19 08:01:53,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:53,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:01:53,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:53,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:01:53,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:01:53,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 346 out of 832 [2023-11-19 08:01:53,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 86 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 347.0) internal successors, (1041), 3 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:53,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:53,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 346 of 832 [2023-11-19 08:01:53,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:01:54,719 INFO L124 PetriNetUnfolderBase]: 6477/10303 cut-off events. [2023-11-19 08:01:54,720 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 08:01:54,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20086 conditions, 10303 events. 6477/10303 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 57960 event pairs, 5577 based on Foata normal form. 0/6044 useless extension candidates. Maximal degree in co-relation 20082. Up to 9739 conditions per place. [2023-11-19 08:01:54,782 INFO L140 encePairwiseOnDemand]: 826/832 looper letters, 72 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2023-11-19 08:01:54,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 82 transitions, 318 flow [2023-11-19 08:01:54,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:01:54,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:01:54,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1116 transitions. [2023-11-19 08:01:54,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44711538461538464 [2023-11-19 08:01:54,787 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1116 transitions. [2023-11-19 08:01:54,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1116 transitions. [2023-11-19 08:01:54,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:01:54,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1116 transitions. [2023-11-19 08:01:54,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 372.0) internal successors, (1116), 3 states have internal predecessors, (1116), 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) [2023-11-19 08:01:54,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 832.0) internal successors, (3328), 4 states have internal predecessors, (3328), 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) [2023-11-19 08:01:54,802 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 832.0) internal successors, (3328), 4 states have internal predecessors, (3328), 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) [2023-11-19 08:01:54,802 INFO L175 Difference]: Start difference. First operand has 84 places, 86 transitions, 178 flow. Second operand 3 states and 1116 transitions. [2023-11-19 08:01:54,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 82 transitions, 318 flow [2023-11-19 08:01:54,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 82 transitions, 317 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:01:54,805 INFO L231 Difference]: Finished difference. Result has 81 places, 82 transitions, 173 flow [2023-11-19 08:01:54,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=832, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=173, PETRI_PLACES=81, PETRI_TRANSITIONS=82} [2023-11-19 08:01:54,807 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -60 predicate places. [2023-11-19 08:01:54,807 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 82 transitions, 173 flow [2023-11-19 08:01:54,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 347.0) internal successors, (1041), 3 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:01:54,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:54,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 08:01:54,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 08:01:54,809 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-19 08:01:54,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:54,810 INFO L85 PathProgramCache]: Analyzing trace with hash 47385045, now seen corresponding path program 1 times [2023-11-19 08:01:54,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:54,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967705073] [2023-11-19 08:01:54,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:54,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:54,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:55,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:55,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:55,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967705073] [2023-11-19 08:01:55,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967705073] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:55,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:55,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:01:55,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141288149] [2023-11-19 08:01:55,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:55,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:01:55,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:55,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:01:55,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:01:55,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 329 out of 832 [2023-11-19 08:01:55,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 82 transitions, 173 flow. Second operand has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 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) [2023-11-19 08:01:55,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:55,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 329 of 832 [2023-11-19 08:01:55,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:01:56,472 INFO L124 PetriNetUnfolderBase]: 6804/10724 cut-off events. [2023-11-19 08:01:56,472 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 08:01:56,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21017 conditions, 10724 events. 6804/10724 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 59346 event pairs, 5843 based on Foata normal form. 0/6126 useless extension candidates. Maximal degree in co-relation 21013. Up to 10243 conditions per place. [2023-11-19 08:01:56,547 INFO L140 encePairwiseOnDemand]: 826/832 looper letters, 76 selfloop transitions, 6 changer transitions 0/88 dead transitions. [2023-11-19 08:01:56,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 88 transitions, 349 flow [2023-11-19 08:01:56,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:01:56,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 08:01:56,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1399 transitions. [2023-11-19 08:01:56,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42037259615384615 [2023-11-19 08:01:56,555 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1399 transitions. [2023-11-19 08:01:56,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1399 transitions. [2023-11-19 08:01:56,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:01:56,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1399 transitions. [2023-11-19 08:01:56,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 349.75) internal successors, (1399), 4 states have internal predecessors, (1399), 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) [2023-11-19 08:01:56,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 832.0) internal successors, (4160), 5 states have internal predecessors, (4160), 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) [2023-11-19 08:01:56,575 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 832.0) internal successors, (4160), 5 states have internal predecessors, (4160), 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) [2023-11-19 08:01:56,575 INFO L175 Difference]: Start difference. First operand has 81 places, 82 transitions, 173 flow. Second operand 4 states and 1399 transitions. [2023-11-19 08:01:56,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 88 transitions, 349 flow [2023-11-19 08:01:56,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 88 transitions, 345 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:01:56,579 INFO L231 Difference]: Finished difference. Result has 84 places, 87 transitions, 208 flow [2023-11-19 08:01:56,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=832, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=208, PETRI_PLACES=84, PETRI_TRANSITIONS=87} [2023-11-19 08:01:56,581 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -57 predicate places. [2023-11-19 08:01:56,592 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 87 transitions, 208 flow [2023-11-19 08:01:56,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 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) [2023-11-19 08:01:56,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:56,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 08:01:56,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 08:01:56,595 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-19 08:01:56,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:56,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1468908738, now seen corresponding path program 1 times [2023-11-19 08:01:56,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:56,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936675025] [2023-11-19 08:01:56,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:56,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:56,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:57,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:57,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:57,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936675025] [2023-11-19 08:01:57,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936675025] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:57,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:57,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:01:57,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320033170] [2023-11-19 08:01:57,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:57,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:01:57,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:57,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:01:57,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:01:57,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 832 [2023-11-19 08:01:57,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 87 transitions, 208 flow. Second operand has 5 states, 5 states have (on average 325.0) internal successors, (1625), 5 states have internal predecessors, (1625), 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) [2023-11-19 08:01:57,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:01:57,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 832 [2023-11-19 08:01:57,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:01:59,404 INFO L124 PetriNetUnfolderBase]: 7349/11563 cut-off events. [2023-11-19 08:01:59,405 INFO L125 PetriNetUnfolderBase]: For 425/425 co-relation queries the response was YES. [2023-11-19 08:01:59,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23315 conditions, 11563 events. 7349/11563 cut-off events. For 425/425 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 65441 event pairs, 1638 based on Foata normal form. 45/6790 useless extension candidates. Maximal degree in co-relation 23309. Up to 10395 conditions per place. [2023-11-19 08:01:59,469 INFO L140 encePairwiseOnDemand]: 825/832 looper letters, 109 selfloop transitions, 12 changer transitions 0/127 dead transitions. [2023-11-19 08:01:59,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 127 transitions, 544 flow [2023-11-19 08:01:59,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:01:59,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 08:01:59,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1415 transitions. [2023-11-19 08:01:59,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42518028846153844 [2023-11-19 08:01:59,476 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1415 transitions. [2023-11-19 08:01:59,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1415 transitions. [2023-11-19 08:01:59,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:01:59,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1415 transitions. [2023-11-19 08:01:59,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 353.75) internal successors, (1415), 4 states have internal predecessors, (1415), 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) [2023-11-19 08:01:59,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 832.0) internal successors, (4160), 5 states have internal predecessors, (4160), 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) [2023-11-19 08:01:59,491 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 832.0) internal successors, (4160), 5 states have internal predecessors, (4160), 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) [2023-11-19 08:01:59,491 INFO L175 Difference]: Start difference. First operand has 84 places, 87 transitions, 208 flow. Second operand 4 states and 1415 transitions. [2023-11-19 08:01:59,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 127 transitions, 544 flow [2023-11-19 08:01:59,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 127 transitions, 544 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 08:01:59,496 INFO L231 Difference]: Finished difference. Result has 89 places, 94 transitions, 281 flow [2023-11-19 08:01:59,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=832, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=281, PETRI_PLACES=89, PETRI_TRANSITIONS=94} [2023-11-19 08:01:59,498 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -52 predicate places. [2023-11-19 08:01:59,498 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 94 transitions, 281 flow [2023-11-19 08:01:59,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 325.0) internal successors, (1625), 5 states have internal predecessors, (1625), 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) [2023-11-19 08:01:59,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:01:59,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 08:01:59,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 08:01:59,500 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-19 08:01:59,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:01:59,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1468937645, now seen corresponding path program 1 times [2023-11-19 08:01:59,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:01:59,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119164824] [2023-11-19 08:01:59,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:01:59,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:01:59,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:01:59,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:01:59,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:01:59,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119164824] [2023-11-19 08:01:59,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119164824] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:01:59,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:01:59,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:01:59,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192023582] [2023-11-19 08:01:59,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:01:59,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:01:59,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:01:59,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:01:59,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:02:00,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 322 out of 832 [2023-11-19 08:02:00,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 94 transitions, 281 flow. Second operand has 5 states, 5 states have (on average 323.0) internal successors, (1615), 5 states have internal predecessors, (1615), 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) [2023-11-19 08:02:00,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:02:00,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 322 of 832 [2023-11-19 08:02:00,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:02:01,692 INFO L124 PetriNetUnfolderBase]: 6314/10088 cut-off events. [2023-11-19 08:02:01,693 INFO L125 PetriNetUnfolderBase]: For 1410/1410 co-relation queries the response was YES. [2023-11-19 08:02:01,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20786 conditions, 10088 events. 6314/10088 cut-off events. For 1410/1410 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 58129 event pairs, 2309 based on Foata normal form. 265/6576 useless extension candidates. Maximal degree in co-relation 20777. Up to 4050 conditions per place. [2023-11-19 08:02:01,766 INFO L140 encePairwiseOnDemand]: 810/832 looper letters, 116 selfloop transitions, 20 changer transitions 0/147 dead transitions. [2023-11-19 08:02:01,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 147 transitions, 665 flow [2023-11-19 08:02:01,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 08:02:01,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 08:02:01,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1740 transitions. [2023-11-19 08:02:01,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4182692307692308 [2023-11-19 08:02:01,779 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1740 transitions. [2023-11-19 08:02:01,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1740 transitions. [2023-11-19 08:02:01,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:02:01,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1740 transitions. [2023-11-19 08:02:01,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 348.0) internal successors, (1740), 5 states have internal predecessors, (1740), 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) [2023-11-19 08:02:01,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 832.0) internal successors, (4992), 6 states have internal predecessors, (4992), 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) [2023-11-19 08:02:01,797 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 832.0) internal successors, (4992), 6 states have internal predecessors, (4992), 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) [2023-11-19 08:02:01,798 INFO L175 Difference]: Start difference. First operand has 89 places, 94 transitions, 281 flow. Second operand 5 states and 1740 transitions. [2023-11-19 08:02:01,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 147 transitions, 665 flow [2023-11-19 08:02:01,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 147 transitions, 663 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-19 08:02:01,813 INFO L231 Difference]: Finished difference. Result has 89 places, 87 transitions, 285 flow [2023-11-19 08:02:01,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=832, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=285, PETRI_PLACES=89, PETRI_TRANSITIONS=87} [2023-11-19 08:02:01,817 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -52 predicate places. [2023-11-19 08:02:01,817 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 87 transitions, 285 flow [2023-11-19 08:02:01,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 323.0) internal successors, (1615), 5 states have internal predecessors, (1615), 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) [2023-11-19 08:02:01,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:02:01,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 08:02:01,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 08:02:01,835 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-19 08:02:01,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:01,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1468896562, now seen corresponding path program 1 times [2023-11-19 08:02:01,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:01,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469260166] [2023-11-19 08:02:01,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:01,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:01,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:01,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:01,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:01,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469260166] [2023-11-19 08:02:01,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469260166] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:02:01,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:02:01,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:02:01,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006277943] [2023-11-19 08:02:01,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:02:01,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:02:01,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:01,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:02:01,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:02:02,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 341 out of 832 [2023-11-19 08:02:02,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 87 transitions, 285 flow. Second operand has 4 states, 4 states have (on average 342.25) internal successors, (1369), 4 states have internal predecessors, (1369), 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) [2023-11-19 08:02:02,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:02:02,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 341 of 832 [2023-11-19 08:02:02,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:02:03,032 INFO L124 PetriNetUnfolderBase]: 4566/7484 cut-off events. [2023-11-19 08:02:03,033 INFO L125 PetriNetUnfolderBase]: For 1504/1504 co-relation queries the response was YES. [2023-11-19 08:02:03,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16392 conditions, 7484 events. 4566/7484 cut-off events. For 1504/1504 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 41326 event pairs, 3763 based on Foata normal form. 0/5089 useless extension candidates. Maximal degree in co-relation 16382. Up to 7016 conditions per place. [2023-11-19 08:02:03,070 INFO L140 encePairwiseOnDemand]: 829/832 looper letters, 73 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2023-11-19 08:02:03,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 86 transitions, 433 flow [2023-11-19 08:02:03,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:02:03,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:02:03,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1093 transitions. [2023-11-19 08:02:03,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.437900641025641 [2023-11-19 08:02:03,076 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1093 transitions. [2023-11-19 08:02:03,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1093 transitions. [2023-11-19 08:02:03,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:02:03,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1093 transitions. [2023-11-19 08:02:03,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 364.3333333333333) internal successors, (1093), 3 states have internal predecessors, (1093), 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) [2023-11-19 08:02:03,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 832.0) internal successors, (3328), 4 states have internal predecessors, (3328), 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) [2023-11-19 08:02:03,086 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 832.0) internal successors, (3328), 4 states have internal predecessors, (3328), 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) [2023-11-19 08:02:03,086 INFO L175 Difference]: Start difference. First operand has 89 places, 87 transitions, 285 flow. Second operand 3 states and 1093 transitions. [2023-11-19 08:02:03,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 86 transitions, 433 flow [2023-11-19 08:02:03,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 86 transitions, 393 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 08:02:03,095 INFO L231 Difference]: Finished difference. Result has 86 places, 86 transitions, 247 flow [2023-11-19 08:02:03,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=832, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=247, PETRI_PLACES=86, PETRI_TRANSITIONS=86} [2023-11-19 08:02:03,096 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -55 predicate places. [2023-11-19 08:02:03,096 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 86 transitions, 247 flow [2023-11-19 08:02:03,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 342.25) internal successors, (1369), 4 states have internal predecessors, (1369), 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) [2023-11-19 08:02:03,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:02:03,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 08:02:03,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 08:02:03,097 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-19 08:02:03,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:03,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1468939428, now seen corresponding path program 2 times [2023-11-19 08:02:03,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:03,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452769773] [2023-11-19 08:02:03,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:03,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:03,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:03,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:03,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:03,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452769773] [2023-11-19 08:02:03,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452769773] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:02:03,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:02:03,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:02:03,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554388151] [2023-11-19 08:02:03,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:02:03,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:02:03,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:03,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:02:03,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:02:03,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 832 [2023-11-19 08:02:03,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 86 transitions, 247 flow. Second operand has 5 states, 5 states have (on average 325.0) internal successors, (1625), 5 states have internal predecessors, (1625), 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) [2023-11-19 08:02:03,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:02:03,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 832 [2023-11-19 08:02:03,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:02:04,827 INFO L124 PetriNetUnfolderBase]: 4721/7581 cut-off events. [2023-11-19 08:02:04,828 INFO L125 PetriNetUnfolderBase]: For 998/998 co-relation queries the response was YES. [2023-11-19 08:02:04,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15661 conditions, 7581 events. 4721/7581 cut-off events. For 998/998 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 40919 event pairs, 1166 based on Foata normal form. 34/5135 useless extension candidates. Maximal degree in co-relation 15651. Up to 6833 conditions per place. [2023-11-19 08:02:04,879 INFO L140 encePairwiseOnDemand]: 827/832 looper letters, 101 selfloop transitions, 9 changer transitions 0/116 dead transitions. [2023-11-19 08:02:04,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 116 transitions, 532 flow [2023-11-19 08:02:04,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:02:04,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 08:02:04,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1403 transitions. [2023-11-19 08:02:04,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4215745192307692 [2023-11-19 08:02:04,887 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1403 transitions. [2023-11-19 08:02:04,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1403 transitions. [2023-11-19 08:02:04,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:02:04,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1403 transitions. [2023-11-19 08:02:04,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 350.75) internal successors, (1403), 4 states have internal predecessors, (1403), 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) [2023-11-19 08:02:04,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 832.0) internal successors, (4160), 5 states have internal predecessors, (4160), 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) [2023-11-19 08:02:04,906 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 832.0) internal successors, (4160), 5 states have internal predecessors, (4160), 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) [2023-11-19 08:02:04,907 INFO L175 Difference]: Start difference. First operand has 86 places, 86 transitions, 247 flow. Second operand 4 states and 1403 transitions. [2023-11-19 08:02:04,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 116 transitions, 532 flow [2023-11-19 08:02:04,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 116 transitions, 526 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-19 08:02:04,914 INFO L231 Difference]: Finished difference. Result has 88 places, 87 transitions, 273 flow [2023-11-19 08:02:04,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=832, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=273, PETRI_PLACES=88, PETRI_TRANSITIONS=87} [2023-11-19 08:02:04,915 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -53 predicate places. [2023-11-19 08:02:04,915 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 87 transitions, 273 flow [2023-11-19 08:02:04,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 325.0) internal successors, (1625), 5 states have internal predecessors, (1625), 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) [2023-11-19 08:02:04,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:02:04,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 08:02:04,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 08:02:04,917 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-19 08:02:04,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:04,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1468896561, now seen corresponding path program 1 times [2023-11-19 08:02:04,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:04,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104665517] [2023-11-19 08:02:04,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:04,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:04,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:04,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:04,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:04,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104665517] [2023-11-19 08:02:04,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104665517] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:02:04,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:02:04,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:02:04,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036054253] [2023-11-19 08:02:04,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:02:04,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:02:04,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:04,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:02:04,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:02:05,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 335 out of 832 [2023-11-19 08:02:05,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 87 transitions, 273 flow. Second operand has 4 states, 4 states have (on average 336.25) internal successors, (1345), 4 states have internal predecessors, (1345), 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) [2023-11-19 08:02:05,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:02:05,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 335 of 832 [2023-11-19 08:02:05,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:02:05,732 INFO L124 PetriNetUnfolderBase]: 2780/4734 cut-off events. [2023-11-19 08:02:05,732 INFO L125 PetriNetUnfolderBase]: For 744/744 co-relation queries the response was YES. [2023-11-19 08:02:05,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9651 conditions, 4734 events. 2780/4734 cut-off events. For 744/744 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 25311 event pairs, 2231 based on Foata normal form. 0/3629 useless extension candidates. Maximal degree in co-relation 9640. Up to 4427 conditions per place. [2023-11-19 08:02:05,752 INFO L140 encePairwiseOnDemand]: 829/832 looper letters, 73 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2023-11-19 08:02:05,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 86 transitions, 421 flow [2023-11-19 08:02:05,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:02:05,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:02:05,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1074 transitions. [2023-11-19 08:02:05,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43028846153846156 [2023-11-19 08:02:05,757 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1074 transitions. [2023-11-19 08:02:05,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1074 transitions. [2023-11-19 08:02:05,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:02:05,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1074 transitions. [2023-11-19 08:02:05,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 358.0) internal successors, (1074), 3 states have internal predecessors, (1074), 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) [2023-11-19 08:02:05,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 832.0) internal successors, (3328), 4 states have internal predecessors, (3328), 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) [2023-11-19 08:02:05,767 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 832.0) internal successors, (3328), 4 states have internal predecessors, (3328), 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) [2023-11-19 08:02:05,767 INFO L175 Difference]: Start difference. First operand has 88 places, 87 transitions, 273 flow. Second operand 3 states and 1074 transitions. [2023-11-19 08:02:05,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 86 transitions, 421 flow [2023-11-19 08:02:05,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 86 transitions, 406 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-19 08:02:05,771 INFO L231 Difference]: Finished difference. Result has 87 places, 86 transitions, 260 flow [2023-11-19 08:02:05,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=832, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=260, PETRI_PLACES=87, PETRI_TRANSITIONS=86} [2023-11-19 08:02:05,772 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -54 predicate places. [2023-11-19 08:02:05,772 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 86 transitions, 260 flow [2023-11-19 08:02:05,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 336.25) internal successors, (1345), 4 states have internal predecessors, (1345), 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) [2023-11-19 08:02:05,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:02:05,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:05,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 08:02:05,774 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-19 08:02:05,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:05,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1520438311, now seen corresponding path program 1 times [2023-11-19 08:02:05,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:05,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825335824] [2023-11-19 08:02:05,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:05,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:05,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:05,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:05,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:05,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825335824] [2023-11-19 08:02:05,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825335824] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:02:05,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:02:05,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:02:05,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728910382] [2023-11-19 08:02:05,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:02:05,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:02:05,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:05,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:02:05,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:02:05,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 344 out of 832 [2023-11-19 08:02:05,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 86 transitions, 260 flow. Second operand has 3 states, 3 states have (on average 346.6666666666667) internal successors, (1040), 3 states have internal predecessors, (1040), 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) [2023-11-19 08:02:05,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:02:05,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 344 of 832 [2023-11-19 08:02:05,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:02:06,289 INFO L124 PetriNetUnfolderBase]: 1862/3153 cut-off events. [2023-11-19 08:02:06,289 INFO L125 PetriNetUnfolderBase]: For 189/189 co-relation queries the response was YES. [2023-11-19 08:02:06,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6386 conditions, 3153 events. 1862/3153 cut-off events. For 189/189 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 13774 event pairs, 925 based on Foata normal form. 70/2476 useless extension candidates. Maximal degree in co-relation 6376. Up to 2053 conditions per place. [2023-11-19 08:02:06,301 INFO L140 encePairwiseOnDemand]: 828/832 looper letters, 97 selfloop transitions, 3 changer transitions 0/109 dead transitions. [2023-11-19 08:02:06,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 109 transitions, 490 flow [2023-11-19 08:02:06,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:02:06,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:02:06,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1130 transitions. [2023-11-19 08:02:06,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452724358974359 [2023-11-19 08:02:06,307 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1130 transitions. [2023-11-19 08:02:06,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1130 transitions. [2023-11-19 08:02:06,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:02:06,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1130 transitions. [2023-11-19 08:02:06,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 376.6666666666667) internal successors, (1130), 3 states have internal predecessors, (1130), 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) [2023-11-19 08:02:06,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 832.0) internal successors, (3328), 4 states have internal predecessors, (3328), 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) [2023-11-19 08:02:06,317 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 832.0) internal successors, (3328), 4 states have internal predecessors, (3328), 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) [2023-11-19 08:02:06,317 INFO L175 Difference]: Start difference. First operand has 87 places, 86 transitions, 260 flow. Second operand 3 states and 1130 transitions. [2023-11-19 08:02:06,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 109 transitions, 490 flow [2023-11-19 08:02:06,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 109 transitions, 460 flow, removed 1 selfloop flow, removed 7 redundant places. [2023-11-19 08:02:06,321 INFO L231 Difference]: Finished difference. Result has 82 places, 81 transitions, 212 flow [2023-11-19 08:02:06,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=832, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=212, PETRI_PLACES=82, PETRI_TRANSITIONS=81} [2023-11-19 08:02:06,322 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -59 predicate places. [2023-11-19 08:02:06,322 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 81 transitions, 212 flow [2023-11-19 08:02:06,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 346.6666666666667) internal successors, (1040), 3 states have internal predecessors, (1040), 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) [2023-11-19 08:02:06,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:02:06,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:06,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 08:02:06,324 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-19 08:02:06,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:06,324 INFO L85 PathProgramCache]: Analyzing trace with hash -58273486, now seen corresponding path program 1 times [2023-11-19 08:02:06,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:06,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812850107] [2023-11-19 08:02:06,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:06,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:06,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:06,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:06,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:06,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812850107] [2023-11-19 08:02:06,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812850107] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:02:06,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:02:06,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:02:06,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610162509] [2023-11-19 08:02:06,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:02:06,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:02:06,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:06,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:02:06,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:02:06,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 347 out of 832 [2023-11-19 08:02:06,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 81 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 350.0) internal successors, (1050), 3 states have internal predecessors, (1050), 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) [2023-11-19 08:02:06,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:02:06,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 347 of 832 [2023-11-19 08:02:06,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:02:07,087 INFO L124 PetriNetUnfolderBase]: 1807/3123 cut-off events. [2023-11-19 08:02:07,088 INFO L125 PetriNetUnfolderBase]: For 164/164 co-relation queries the response was YES. [2023-11-19 08:02:07,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6302 conditions, 3123 events. 1807/3123 cut-off events. For 164/164 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 13910 event pairs, 1404 based on Foata normal form. 0/2354 useless extension candidates. Maximal degree in co-relation 6294. Up to 2935 conditions per place. [2023-11-19 08:02:07,102 INFO L140 encePairwiseOnDemand]: 830/832 looper letters, 68 selfloop transitions, 1 changer transitions 0/80 dead transitions. [2023-11-19 08:02:07,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 80 transitions, 348 flow [2023-11-19 08:02:07,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:02:07,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:02:07,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1108 transitions. [2023-11-19 08:02:07,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4439102564102564 [2023-11-19 08:02:07,107 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1108 transitions. [2023-11-19 08:02:07,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1108 transitions. [2023-11-19 08:02:07,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:02:07,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1108 transitions. [2023-11-19 08:02:07,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 369.3333333333333) internal successors, (1108), 3 states have internal predecessors, (1108), 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) [2023-11-19 08:02:07,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 832.0) internal successors, (3328), 4 states have internal predecessors, (3328), 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) [2023-11-19 08:02:07,117 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 832.0) internal successors, (3328), 4 states have internal predecessors, (3328), 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) [2023-11-19 08:02:07,118 INFO L175 Difference]: Start difference. First operand has 82 places, 81 transitions, 212 flow. Second operand 3 states and 1108 transitions. [2023-11-19 08:02:07,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 80 transitions, 348 flow [2023-11-19 08:02:07,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 80 transitions, 345 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:02:07,121 INFO L231 Difference]: Finished difference. Result has 82 places, 80 transitions, 209 flow [2023-11-19 08:02:07,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=832, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=209, PETRI_PLACES=82, PETRI_TRANSITIONS=80} [2023-11-19 08:02:07,122 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -59 predicate places. [2023-11-19 08:02:07,123 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 80 transitions, 209 flow [2023-11-19 08:02:07,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 350.0) internal successors, (1050), 3 states have internal predecessors, (1050), 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) [2023-11-19 08:02:07,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:02:07,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:02:07,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-19 08:02:07,124 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-19 08:02:07,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:07,124 INFO L85 PathProgramCache]: Analyzing trace with hash -58273485, now seen corresponding path program 1 times [2023-11-19 08:02:07,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:07,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972245872] [2023-11-19 08:02:07,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:07,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:07,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:07,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:02:07,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:07,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972245872] [2023-11-19 08:02:07,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972245872] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:02:07,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:02:07,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 08:02:07,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133649868] [2023-11-19 08:02:07,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:02:07,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 08:02:07,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:07,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 08:02:07,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 08:02:07,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 320 out of 832 [2023-11-19 08:02:07,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 80 transitions, 209 flow. Second operand has 6 states, 6 states have (on average 321.6666666666667) internal successors, (1930), 6 states have internal predecessors, (1930), 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) [2023-11-19 08:02:07,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:02:07,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 320 of 832 [2023-11-19 08:02:07,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand