./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/queue_longer.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bf127ee-a390-4ac9-9f2e-8f0e130f94ca/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bf127ee-a390-4ac9-9f2e-8f0e130f94ca/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bf127ee-a390-4ac9-9f2e-8f0e130f94ca/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bf127ee-a390-4ac9-9f2e-8f0e130f94ca/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/queue_longer.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bf127ee-a390-4ac9-9f2e-8f0e130f94ca/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bf127ee-a390-4ac9-9f2e-8f0e130f94ca/bin/uautomizer-verify-uTZkv6EMXl --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 9f874a9872f93f025fac23ebed37f94a1f3b80bd0133ea4d7e298577c4fec427 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:15:54,228 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:15:54,304 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bf127ee-a390-4ac9-9f2e-8f0e130f94ca/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-12 02:15:54,310 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:15:54,311 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:15:54,338 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:15:54,339 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:15:54,340 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:15:54,341 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:15:54,341 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:15:54,342 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:15:54,343 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:15:54,343 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:15:54,344 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:15:54,345 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:15:54,345 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:15:54,346 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:15:54,346 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:15:54,347 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-12 02:15:54,347 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-12 02:15:54,348 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-12 02:15:54,348 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:15:54,349 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 02:15:54,349 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 02:15:54,350 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:15:54,350 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:15:54,351 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:15:54,351 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:15:54,352 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:15:54,352 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:15:54,353 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:15:54,353 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:15:54,353 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:15:54,354 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:15:54,354 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:15:54,354 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:15:54,354 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:15:54,355 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:15:54,355 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_3bf127ee-a390-4ac9-9f2e-8f0e130f94ca/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bf127ee-a390-4ac9-9f2e-8f0e130f94ca/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9f874a9872f93f025fac23ebed37f94a1f3b80bd0133ea4d7e298577c4fec427 [2023-11-12 02:15:54,730 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:15:54,762 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:15:54,766 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:15:54,767 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:15:54,768 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:15:54,769 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bf127ee-a390-4ac9-9f2e-8f0e130f94ca/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/pthread/queue_longer.i [2023-11-12 02:15:57,969 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:15:58,336 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:15:58,337 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bf127ee-a390-4ac9-9f2e-8f0e130f94ca/sv-benchmarks/c/pthread/queue_longer.i [2023-11-12 02:15:58,361 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bf127ee-a390-4ac9-9f2e-8f0e130f94ca/bin/uautomizer-verify-uTZkv6EMXl/data/aeb8574d8/202b5bd61c5b493dbc1d90dcec957553/FLAG554a9bb55 [2023-11-12 02:15:58,378 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bf127ee-a390-4ac9-9f2e-8f0e130f94ca/bin/uautomizer-verify-uTZkv6EMXl/data/aeb8574d8/202b5bd61c5b493dbc1d90dcec957553 [2023-11-12 02:15:58,383 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:15:58,388 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:15:58,398 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:15:58,398 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:15:58,404 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:15:58,407 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:15:58" (1/1) ... [2023-11-12 02:15:58,408 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a421b6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:58, skipping insertion in model container [2023-11-12 02:15:58,408 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:15:58" (1/1) ... [2023-11-12 02:15:58,521 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:15:59,038 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:15:59,053 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:15:59,114 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:15:59,200 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:15:59,200 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:59 WrapperNode [2023-11-12 02:15:59,200 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:15:59,202 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:15:59,202 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:15:59,202 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:15:59,210 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:59" (1/1) ... [2023-11-12 02:15:59,244 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:59" (1/1) ... [2023-11-12 02:15:59,305 INFO L138 Inliner]: procedures = 274, calls = 63, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 251 [2023-11-12 02:15:59,306 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:15:59,306 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:15:59,306 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:15:59,307 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:15:59,317 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:59" (1/1) ... [2023-11-12 02:15:59,317 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:59" (1/1) ... [2023-11-12 02:15:59,332 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:59" (1/1) ... [2023-11-12 02:15:59,339 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:59" (1/1) ... [2023-11-12 02:15:59,364 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:59" (1/1) ... [2023-11-12 02:15:59,372 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:59" (1/1) ... [2023-11-12 02:15:59,376 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:59" (1/1) ... [2023-11-12 02:15:59,383 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:59" (1/1) ... [2023-11-12 02:15:59,387 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:15:59,394 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:15:59,395 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:15:59,395 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:15:59,396 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:59" (1/1) ... [2023-11-12 02:15:59,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:15:59,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bf127ee-a390-4ac9-9f2e-8f0e130f94ca/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:15:59,435 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bf127ee-a390-4ac9-9f2e-8f0e130f94ca/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:15:59,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bf127ee-a390-4ac9-9f2e-8f0e130f94ca/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:15:59,485 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-12 02:15:59,485 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-12 02:15:59,486 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-12 02:15:59,487 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-12 02:15:59,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:15:59,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:15:59,487 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:15:59,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:15:59,488 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-12 02:15:59,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:15:59,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:15:59,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:15:59,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:15:59,490 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:15:59,684 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:15:59,687 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:16:00,307 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:16:00,389 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:16:00,389 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 02:16:00,392 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:16:00 BoogieIcfgContainer [2023-11-12 02:16:00,392 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:16:00,394 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:16:00,395 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:16:00,398 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:16:00,408 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:15:58" (1/3) ... [2023-11-12 02:16:00,409 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d11e3d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:16:00, skipping insertion in model container [2023-11-12 02:16:00,409 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:15:59" (2/3) ... [2023-11-12 02:16:00,410 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d11e3d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:16:00, skipping insertion in model container [2023-11-12 02:16:00,410 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:16:00" (3/3) ... [2023-11-12 02:16:00,411 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_longer.i [2023-11-12 02:16:00,429 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:16:00,429 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 80 error locations. [2023-11-12 02:16:00,429 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:16:00,660 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-12 02:16:00,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 354 places, 365 transitions, 744 flow [2023-11-12 02:16:00,875 INFO L124 PetriNetUnfolderBase]: 18/363 cut-off events. [2023-11-12 02:16:00,875 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:16:00,898 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. [2023-11-12 02:16:00,898 INFO L82 GeneralOperation]: Start removeDead. Operand has 354 places, 365 transitions, 744 flow [2023-11-12 02:16:00,910 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 347 places, 358 transitions, 728 flow [2023-11-12 02:16:00,914 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:16:00,924 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 347 places, 358 transitions, 728 flow [2023-11-12 02:16:00,927 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 347 places, 358 transitions, 728 flow [2023-11-12 02:16:00,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 347 places, 358 transitions, 728 flow [2023-11-12 02:16:01,041 INFO L124 PetriNetUnfolderBase]: 18/358 cut-off events. [2023-11-12 02:16:01,042 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:16:01,051 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. [2023-11-12 02:16:01,075 INFO L119 LiptonReduction]: Number of co-enabled transitions 33180 [2023-11-12 02:16:18,712 INFO L134 LiptonReduction]: Checked pairs total: 127086 [2023-11-12 02:16:18,713 INFO L136 LiptonReduction]: Total number of compositions: 467 [2023-11-12 02:16:18,737 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:16:18,744 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;@6ac6e7a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:16:18,745 INFO L358 AbstractCegarLoop]: Starting to check reachability of 142 error locations. [2023-11-12 02:16:18,747 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:16:18,747 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-11-12 02:16:18,748 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:16:18,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:18,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-12 02:16:18,754 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)] === [2023-11-12 02:16:18,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:18,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1552, now seen corresponding path program 1 times [2023-11-12 02:16:18,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:18,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406504639] [2023-11-12 02:16:18,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:18,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:18,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:18,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:18,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:18,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406504639] [2023-11-12 02:16:18,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406504639] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:18,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:16:18,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-12 02:16:18,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615853132] [2023-11-12 02:16:18,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:18,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:16:18,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:18,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:16:18,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:16:18,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 349 out of 832 [2023-11-12 02:16:18,944 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) [2023-11-12 02:16:18,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:18,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 349 of 832 [2023-11-12 02:16:18,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:20,852 INFO L124 PetriNetUnfolderBase]: 8425/13445 cut-off events. [2023-11-12 02:16:20,852 INFO L125 PetriNetUnfolderBase]: For 70/70 co-relation queries the response was YES. [2023-11-12 02:16:20,872 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. [2023-11-12 02:16:20,965 INFO L140 encePairwiseOnDemand]: 782/832 looper letters, 87 selfloop transitions, 0 changer transitions 0/95 dead transitions. [2023-11-12 02:16:20,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 95 transitions, 376 flow [2023-11-12 02:16:20,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:16:20,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-12 02:16:20,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 835 transitions. [2023-11-12 02:16:20,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5018028846153846 [2023-11-12 02:16:20,985 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 835 transitions. [2023-11-12 02:16:20,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 835 transitions. [2023-11-12 02:16:20,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:20,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 835 transitions. [2023-11-12 02:16:20,998 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) [2023-11-12 02:16:21,008 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) [2023-11-12 02:16:21,011 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) [2023-11-12 02:16:21,013 INFO L175 Difference]: Start difference. First operand has 141 places, 145 transitions, 302 flow. Second operand 2 states and 835 transitions. [2023-11-12 02:16:21,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 95 transitions, 376 flow [2023-11-12 02:16:21,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 95 transitions, 368 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-12 02:16:21,029 INFO L231 Difference]: Finished difference. Result has 91 places, 95 transitions, 194 flow [2023-11-12 02:16:21,031 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} [2023-11-12 02:16:21,034 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -50 predicate places. [2023-11-12 02:16:21,035 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 95 transitions, 194 flow [2023-11-12 02:16:21,036 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) [2023-11-12 02:16:21,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:21,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-12 02:16:21,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:16:21,037 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)] === [2023-11-12 02:16:21,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:21,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1528472, now seen corresponding path program 1 times [2023-11-12 02:16:21,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:21,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720635951] [2023-11-12 02:16:21,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:21,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:21,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:21,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:21,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:21,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720635951] [2023-11-12 02:16:21,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720635951] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:21,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:16:21,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:16:21,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721379134] [2023-11-12 02:16:21,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:21,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:16:21,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:21,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:16:21,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:16:21,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 832 [2023-11-12 02:16:21,637 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) [2023-11-12 02:16:21,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:21,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 832 [2023-11-12 02:16:21,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:23,348 INFO L124 PetriNetUnfolderBase]: 8351/13299 cut-off events. [2023-11-12 02:16:23,348 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-12 02:16:23,365 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. [2023-11-12 02:16:23,439 INFO L140 encePairwiseOnDemand]: 828/832 looper letters, 83 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2023-11-12 02:16:23,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 93 transitions, 360 flow [2023-11-12 02:16:23,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:16:23,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:16:23,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1116 transitions. [2023-11-12 02:16:23,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44711538461538464 [2023-11-12 02:16:23,446 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1116 transitions. [2023-11-12 02:16:23,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1116 transitions. [2023-11-12 02:16:23,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:23,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1116 transitions. [2023-11-12 02:16:23,453 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) [2023-11-12 02:16:23,464 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) [2023-11-12 02:16:23,467 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) [2023-11-12 02:16:23,467 INFO L175 Difference]: Start difference. First operand has 91 places, 95 transitions, 194 flow. Second operand 3 states and 1116 transitions. [2023-11-12 02:16:23,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 93 transitions, 360 flow [2023-11-12 02:16:23,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 93 transitions, 360 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:16:23,473 INFO L231 Difference]: Finished difference. Result has 91 places, 93 transitions, 194 flow [2023-11-12 02:16:23,474 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} [2023-11-12 02:16:23,479 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -50 predicate places. [2023-11-12 02:16:23,479 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 93 transitions, 194 flow [2023-11-12 02:16:23,481 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) [2023-11-12 02:16:23,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:23,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-12 02:16:23,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:16:23,483 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)] === [2023-11-12 02:16:23,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:23,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1528474, now seen corresponding path program 1 times [2023-11-12 02:16:23,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:23,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921152642] [2023-11-12 02:16:23,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:23,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:23,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:23,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:23,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:23,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921152642] [2023-11-12 02:16:23,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921152642] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:23,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:16:23,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:16:23,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508453928] [2023-11-12 02:16:23,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:23,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:16:23,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:23,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:16:23,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:16:23,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 339 out of 832 [2023-11-12 02:16:23,813 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) [2023-11-12 02:16:23,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:23,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 339 of 832 [2023-11-12 02:16:23,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:25,382 INFO L124 PetriNetUnfolderBase]: 8277/13153 cut-off events. [2023-11-12 02:16:25,382 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-12 02:16:25,402 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. [2023-11-12 02:16:25,464 INFO L140 encePairwiseOnDemand]: 828/832 looper letters, 81 selfloop transitions, 2 changer transitions 0/91 dead transitions. [2023-11-12 02:16:25,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 91 transitions, 356 flow [2023-11-12 02:16:25,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:16:25,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:16:25,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1102 transitions. [2023-11-12 02:16:25,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44150641025641024 [2023-11-12 02:16:25,469 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1102 transitions. [2023-11-12 02:16:25,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1102 transitions. [2023-11-12 02:16:25,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:25,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1102 transitions. [2023-11-12 02:16:25,474 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) [2023-11-12 02:16:25,482 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) [2023-11-12 02:16:25,485 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) [2023-11-12 02:16:25,485 INFO L175 Difference]: Start difference. First operand has 91 places, 93 transitions, 194 flow. Second operand 3 states and 1102 transitions. [2023-11-12 02:16:25,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 91 transitions, 356 flow [2023-11-12 02:16:25,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 91 transitions, 352 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:16:25,490 INFO L231 Difference]: Finished difference. Result has 89 places, 91 transitions, 190 flow [2023-11-12 02:16:25,491 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} [2023-11-12 02:16:25,492 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -52 predicate places. [2023-11-12 02:16:25,492 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 91 transitions, 190 flow [2023-11-12 02:16:25,494 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) [2023-11-12 02:16:25,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:25,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-12 02:16:25,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:16:25,494 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-12 02:16:25,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:25,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1528550, now seen corresponding path program 1 times [2023-11-12 02:16:25,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:25,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237665388] [2023-11-12 02:16:25,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:25,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:25,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:25,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:25,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:25,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237665388] [2023-11-12 02:16:25,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237665388] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:25,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:16:25,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:16:25,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236685558] [2023-11-12 02:16:25,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:25,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:16:25,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:25,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:16:25,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:16:26,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 347 out of 832 [2023-11-12 02:16:26,002 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) [2023-11-12 02:16:26,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:26,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 347 of 832 [2023-11-12 02:16:26,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:27,407 INFO L124 PetriNetUnfolderBase]: 7267/11553 cut-off events. [2023-11-12 02:16:27,407 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-12 02:16:27,428 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. [2023-11-12 02:16:27,486 INFO L140 encePairwiseOnDemand]: 826/832 looper letters, 77 selfloop transitions, 1 changer transitions 0/86 dead transitions. [2023-11-12 02:16:27,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 86 transitions, 336 flow [2023-11-12 02:16:27,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:16:27,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:16:27,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1124 transitions. [2023-11-12 02:16:27,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45032051282051283 [2023-11-12 02:16:27,493 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1124 transitions. [2023-11-12 02:16:27,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1124 transitions. [2023-11-12 02:16:27,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:27,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1124 transitions. [2023-11-12 02:16:27,500 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) [2023-11-12 02:16:27,508 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) [2023-11-12 02:16:27,512 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) [2023-11-12 02:16:27,512 INFO L175 Difference]: Start difference. First operand has 89 places, 91 transitions, 190 flow. Second operand 3 states and 1124 transitions. [2023-11-12 02:16:27,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 86 transitions, 336 flow [2023-11-12 02:16:27,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 86 transitions, 332 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:16:27,516 INFO L231 Difference]: Finished difference. Result has 84 places, 86 transitions, 178 flow [2023-11-12 02:16:27,517 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} [2023-11-12 02:16:27,519 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -57 predicate places. [2023-11-12 02:16:27,519 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 86 transitions, 178 flow [2023-11-12 02:16:27,521 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) [2023-11-12 02:16:27,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:27,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-12 02:16:27,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:16:27,522 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-12 02:16:27,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:27,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1528551, now seen corresponding path program 1 times [2023-11-12 02:16:27,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:27,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554415796] [2023-11-12 02:16:27,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:27,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:27,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:27,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:27,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:27,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554415796] [2023-11-12 02:16:27,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554415796] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:27,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:16:27,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:16:27,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402816040] [2023-11-12 02:16:27,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:27,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:16:27,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:27,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:16:27,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:16:27,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 346 out of 832 [2023-11-12 02:16:27,900 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) [2023-11-12 02:16:27,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:27,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 346 of 832 [2023-11-12 02:16:27,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:28,959 INFO L124 PetriNetUnfolderBase]: 6477/10303 cut-off events. [2023-11-12 02:16:28,959 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-12 02:16:28,977 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. [2023-11-12 02:16:29,024 INFO L140 encePairwiseOnDemand]: 826/832 looper letters, 72 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2023-11-12 02:16:29,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 82 transitions, 318 flow [2023-11-12 02:16:29,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:16:29,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:16:29,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1116 transitions. [2023-11-12 02:16:29,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44711538461538464 [2023-11-12 02:16:29,030 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1116 transitions. [2023-11-12 02:16:29,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1116 transitions. [2023-11-12 02:16:29,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:29,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1116 transitions. [2023-11-12 02:16:29,036 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) [2023-11-12 02:16:29,043 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) [2023-11-12 02:16:29,046 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) [2023-11-12 02:16:29,046 INFO L175 Difference]: Start difference. First operand has 84 places, 86 transitions, 178 flow. Second operand 3 states and 1116 transitions. [2023-11-12 02:16:29,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 82 transitions, 318 flow [2023-11-12 02:16:29,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 82 transitions, 317 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:16:29,049 INFO L231 Difference]: Finished difference. Result has 81 places, 82 transitions, 173 flow [2023-11-12 02:16:29,050 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} [2023-11-12 02:16:29,050 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -60 predicate places. [2023-11-12 02:16:29,051 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 82 transitions, 173 flow [2023-11-12 02:16:29,052 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) [2023-11-12 02:16:29,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:29,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-12 02:16:29,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:16:29,053 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-12 02:16:29,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:29,053 INFO L85 PathProgramCache]: Analyzing trace with hash 47385045, now seen corresponding path program 1 times [2023-11-12 02:16:29,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:29,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24703631] [2023-11-12 02:16:29,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:29,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:29,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:29,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:29,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:29,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24703631] [2023-11-12 02:16:29,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24703631] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:29,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:16:29,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:16:29,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327851192] [2023-11-12 02:16:29,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:29,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:16:29,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:29,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:16:29,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:16:29,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 329 out of 832 [2023-11-12 02:16:29,460 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) [2023-11-12 02:16:29,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:29,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 329 of 832 [2023-11-12 02:16:29,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:30,625 INFO L124 PetriNetUnfolderBase]: 6804/10724 cut-off events. [2023-11-12 02:16:30,625 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-12 02:16:30,639 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. [2023-11-12 02:16:30,683 INFO L140 encePairwiseOnDemand]: 826/832 looper letters, 76 selfloop transitions, 6 changer transitions 0/88 dead transitions. [2023-11-12 02:16:30,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 88 transitions, 349 flow [2023-11-12 02:16:30,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:16:30,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:16:30,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1399 transitions. [2023-11-12 02:16:30,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42037259615384615 [2023-11-12 02:16:30,690 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1399 transitions. [2023-11-12 02:16:30,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1399 transitions. [2023-11-12 02:16:30,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:30,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1399 transitions. [2023-11-12 02:16:30,696 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) [2023-11-12 02:16:30,704 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) [2023-11-12 02:16:30,708 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) [2023-11-12 02:16:30,708 INFO L175 Difference]: Start difference. First operand has 81 places, 82 transitions, 173 flow. Second operand 4 states and 1399 transitions. [2023-11-12 02:16:30,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 88 transitions, 349 flow [2023-11-12 02:16:30,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 88 transitions, 345 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:16:30,711 INFO L231 Difference]: Finished difference. Result has 84 places, 87 transitions, 208 flow [2023-11-12 02:16:30,711 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} [2023-11-12 02:16:30,712 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -57 predicate places. [2023-11-12 02:16:30,713 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 87 transitions, 208 flow [2023-11-12 02:16:30,714 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) [2023-11-12 02:16:30,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:30,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 02:16:30,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 02:16:30,714 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-12 02:16:30,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:30,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1468908738, now seen corresponding path program 1 times [2023-11-12 02:16:30,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:30,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752828724] [2023-11-12 02:16:30,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:30,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:30,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:31,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:31,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:31,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752828724] [2023-11-12 02:16:31,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752828724] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:31,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:16:31,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:16:31,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789269579] [2023-11-12 02:16:31,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:31,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:16:31,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:31,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:16:31,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:16:31,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 832 [2023-11-12 02:16:31,860 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) [2023-11-12 02:16:31,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:31,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 832 [2023-11-12 02:16:31,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:33,084 INFO L124 PetriNetUnfolderBase]: 7058/11129 cut-off events. [2023-11-12 02:16:33,084 INFO L125 PetriNetUnfolderBase]: For 425/425 co-relation queries the response was YES. [2023-11-12 02:16:33,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22317 conditions, 11129 events. 7058/11129 cut-off events. For 425/425 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 63399 event pairs, 1689 based on Foata normal form. 45/6519 useless extension candidates. Maximal degree in co-relation 22311. Up to 10293 conditions per place. [2023-11-12 02:16:33,151 INFO L140 encePairwiseOnDemand]: 826/832 looper letters, 108 selfloop transitions, 9 changer transitions 0/123 dead transitions. [2023-11-12 02:16:33,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 123 transitions, 522 flow [2023-11-12 02:16:33,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:16:33,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:16:33,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1411 transitions. [2023-11-12 02:16:33,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42397836538461536 [2023-11-12 02:16:33,159 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1411 transitions. [2023-11-12 02:16:33,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1411 transitions. [2023-11-12 02:16:33,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:33,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1411 transitions. [2023-11-12 02:16:33,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 352.75) internal successors, (1411), 4 states have internal predecessors, (1411), 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) [2023-11-12 02:16:33,173 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) [2023-11-12 02:16:33,175 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) [2023-11-12 02:16:33,175 INFO L175 Difference]: Start difference. First operand has 84 places, 87 transitions, 208 flow. Second operand 4 states and 1411 transitions. [2023-11-12 02:16:33,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 123 transitions, 522 flow [2023-11-12 02:16:33,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 123 transitions, 522 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:16:33,179 INFO L231 Difference]: Finished difference. Result has 89 places, 92 transitions, 263 flow [2023-11-12 02:16:33,180 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=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=263, PETRI_PLACES=89, PETRI_TRANSITIONS=92} [2023-11-12 02:16:33,181 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -52 predicate places. [2023-11-12 02:16:33,182 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 92 transitions, 263 flow [2023-11-12 02:16:33,182 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) [2023-11-12 02:16:33,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:33,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 02:16:33,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 02:16:33,183 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-12 02:16:33,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:33,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1468937645, now seen corresponding path program 1 times [2023-11-12 02:16:33,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:33,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525227634] [2023-11-12 02:16:33,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:33,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:33,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:33,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:33,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:33,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525227634] [2023-11-12 02:16:33,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525227634] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:33,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:16:33,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:16:33,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449008972] [2023-11-12 02:16:33,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:33,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:16:33,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:33,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:16:33,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:16:34,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 322 out of 832 [2023-11-12 02:16:34,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 92 transitions, 263 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) [2023-11-12 02:16:34,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:34,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 322 of 832 [2023-11-12 02:16:34,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:35,569 INFO L124 PetriNetUnfolderBase]: 6068/9699 cut-off events. [2023-11-12 02:16:35,569 INFO L125 PetriNetUnfolderBase]: For 1175/1175 co-relation queries the response was YES. [2023-11-12 02:16:35,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19805 conditions, 9699 events. 6068/9699 cut-off events. For 1175/1175 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 55716 event pairs, 2279 based on Foata normal form. 220/6248 useless extension candidates. Maximal degree in co-relation 19796. Up to 4050 conditions per place. [2023-11-12 02:16:35,639 INFO L140 encePairwiseOnDemand]: 810/832 looper letters, 114 selfloop transitions, 20 changer transitions 0/144 dead transitions. [2023-11-12 02:16:35,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 144 transitions, 636 flow [2023-11-12 02:16:35,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:16:35,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:16:35,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1740 transitions. [2023-11-12 02:16:35,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4182692307692308 [2023-11-12 02:16:35,653 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1740 transitions. [2023-11-12 02:16:35,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1740 transitions. [2023-11-12 02:16:35,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:35,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1740 transitions. [2023-11-12 02:16:35,662 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) [2023-11-12 02:16:35,672 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) [2023-11-12 02:16:35,674 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) [2023-11-12 02:16:35,674 INFO L175 Difference]: Start difference. First operand has 89 places, 92 transitions, 263 flow. Second operand 5 states and 1740 transitions. [2023-11-12 02:16:35,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 144 transitions, 636 flow [2023-11-12 02:16:35,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 144 transitions, 630 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-11-12 02:16:35,687 INFO L231 Difference]: Finished difference. Result has 89 places, 86 transitions, 270 flow [2023-11-12 02:16:35,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=832, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=270, PETRI_PLACES=89, PETRI_TRANSITIONS=86} [2023-11-12 02:16:35,691 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -52 predicate places. [2023-11-12 02:16:35,691 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 86 transitions, 270 flow [2023-11-12 02:16:35,705 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) [2023-11-12 02:16:35,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:35,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 02:16:35,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 02:16:35,709 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)] === [2023-11-12 02:16:35,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:35,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1468896562, now seen corresponding path program 1 times [2023-11-12 02:16:35,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:35,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417632560] [2023-11-12 02:16:35,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:35,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:35,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:35,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:35,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:35,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417632560] [2023-11-12 02:16:35,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417632560] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:35,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:16:35,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:16:35,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285287687] [2023-11-12 02:16:35,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:35,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:16:35,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:35,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:16:35,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:16:36,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 341 out of 832 [2023-11-12 02:16:36,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 86 transitions, 270 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) [2023-11-12 02:16:36,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:36,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 341 of 832 [2023-11-12 02:16:36,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:37,132 INFO L124 PetriNetUnfolderBase]: 4422/7220 cut-off events. [2023-11-12 02:16:37,133 INFO L125 PetriNetUnfolderBase]: For 1069/1069 co-relation queries the response was YES. [2023-11-12 02:16:37,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15653 conditions, 7220 events. 4422/7220 cut-off events. For 1069/1069 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 39682 event pairs, 3601 based on Foata normal form. 0/4885 useless extension candidates. Maximal degree in co-relation 15643. Up to 6771 conditions per place. [2023-11-12 02:16:37,177 INFO L140 encePairwiseOnDemand]: 829/832 looper letters, 73 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2023-11-12 02:16:37,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 85 transitions, 418 flow [2023-11-12 02:16:37,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:16:37,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:16:37,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1093 transitions. [2023-11-12 02:16:37,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.437900641025641 [2023-11-12 02:16:37,184 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1093 transitions. [2023-11-12 02:16:37,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1093 transitions. [2023-11-12 02:16:37,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:37,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1093 transitions. [2023-11-12 02:16:37,189 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) [2023-11-12 02:16:37,195 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) [2023-11-12 02:16:37,196 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) [2023-11-12 02:16:37,197 INFO L175 Difference]: Start difference. First operand has 89 places, 86 transitions, 270 flow. Second operand 3 states and 1093 transitions. [2023-11-12 02:16:37,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 85 transitions, 418 flow [2023-11-12 02:16:37,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 85 transitions, 378 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-12 02:16:37,206 INFO L231 Difference]: Finished difference. Result has 86 places, 85 transitions, 232 flow [2023-11-12 02:16:37,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=832, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=86, PETRI_TRANSITIONS=85} [2023-11-12 02:16:37,207 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -55 predicate places. [2023-11-12 02:16:37,207 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 85 transitions, 232 flow [2023-11-12 02:16:37,208 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) [2023-11-12 02:16:37,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:37,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 02:16:37,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 02:16:37,209 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-12 02:16:37,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:37,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1468896561, now seen corresponding path program 1 times [2023-11-12 02:16:37,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:37,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874694457] [2023-11-12 02:16:37,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:37,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:37,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:37,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:37,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:37,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874694457] [2023-11-12 02:16:37,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874694457] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:37,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:16:37,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:16:37,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029969148] [2023-11-12 02:16:37,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:37,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:16:37,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:37,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:16:37,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:16:37,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 335 out of 832 [2023-11-12 02:16:37,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 85 transitions, 232 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) [2023-11-12 02:16:37,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:37,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 335 of 832 [2023-11-12 02:16:37,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:38,186 INFO L124 PetriNetUnfolderBase]: 2730/4630 cut-off events. [2023-11-12 02:16:38,186 INFO L125 PetriNetUnfolderBase]: For 304/304 co-relation queries the response was YES. [2023-11-12 02:16:38,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9300 conditions, 4630 events. 2730/4630 cut-off events. For 304/304 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 24601 event pairs, 2188 based on Foata normal form. 0/3537 useless extension candidates. Maximal degree in co-relation 9290. Up to 4332 conditions per place. [2023-11-12 02:16:38,210 INFO L140 encePairwiseOnDemand]: 829/832 looper letters, 72 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2023-11-12 02:16:38,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 84 transitions, 378 flow [2023-11-12 02:16:38,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:16:38,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:16:38,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1074 transitions. [2023-11-12 02:16:38,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43028846153846156 [2023-11-12 02:16:38,215 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1074 transitions. [2023-11-12 02:16:38,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1074 transitions. [2023-11-12 02:16:38,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:38,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1074 transitions. [2023-11-12 02:16:38,220 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) [2023-11-12 02:16:38,224 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) [2023-11-12 02:16:38,225 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) [2023-11-12 02:16:38,225 INFO L175 Difference]: Start difference. First operand has 86 places, 85 transitions, 232 flow. Second operand 3 states and 1074 transitions. [2023-11-12 02:16:38,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 84 transitions, 378 flow [2023-11-12 02:16:38,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 84 transitions, 374 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:16:38,229 INFO L231 Difference]: Finished difference. Result has 85 places, 84 transitions, 230 flow [2023-11-12 02:16:38,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=832, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=230, PETRI_PLACES=85, PETRI_TRANSITIONS=84} [2023-11-12 02:16:38,230 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -56 predicate places. [2023-11-12 02:16:38,230 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 84 transitions, 230 flow [2023-11-12 02:16:38,231 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) [2023-11-12 02:16:38,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:38,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:38,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-12 02:16:38,232 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-12 02:16:38,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:38,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1520438311, now seen corresponding path program 1 times [2023-11-12 02:16:38,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:38,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794518103] [2023-11-12 02:16:38,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:38,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:38,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:38,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:38,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:38,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794518103] [2023-11-12 02:16:38,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794518103] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:38,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:16:38,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:16:38,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013957473] [2023-11-12 02:16:38,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:38,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:16:38,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:38,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:16:38,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:16:38,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 344 out of 832 [2023-11-12 02:16:38,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 84 transitions, 230 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) [2023-11-12 02:16:38,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:38,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 344 of 832 [2023-11-12 02:16:38,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:38,758 INFO L124 PetriNetUnfolderBase]: 1844/3110 cut-off events. [2023-11-12 02:16:38,758 INFO L125 PetriNetUnfolderBase]: For 141/141 co-relation queries the response was YES. [2023-11-12 02:16:38,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6293 conditions, 3110 events. 1844/3110 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 13509 event pairs, 910 based on Foata normal form. 66/2436 useless extension candidates. Maximal degree in co-relation 6283. Up to 2053 conditions per place. [2023-11-12 02:16:38,771 INFO L140 encePairwiseOnDemand]: 828/832 looper letters, 97 selfloop transitions, 3 changer transitions 0/108 dead transitions. [2023-11-12 02:16:38,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 108 transitions, 473 flow [2023-11-12 02:16:38,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:16:38,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:16:38,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1130 transitions. [2023-11-12 02:16:38,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.452724358974359 [2023-11-12 02:16:38,777 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1130 transitions. [2023-11-12 02:16:38,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1130 transitions. [2023-11-12 02:16:38,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:38,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1130 transitions. [2023-11-12 02:16:38,781 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) [2023-11-12 02:16:38,786 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) [2023-11-12 02:16:38,787 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) [2023-11-12 02:16:38,787 INFO L175 Difference]: Start difference. First operand has 85 places, 84 transitions, 230 flow. Second operand 3 states and 1130 transitions. [2023-11-12 02:16:38,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 108 transitions, 473 flow [2023-11-12 02:16:38,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 108 transitions, 448 flow, removed 1 selfloop flow, removed 7 redundant places. [2023-11-12 02:16:38,791 INFO L231 Difference]: Finished difference. Result has 80 places, 80 transitions, 200 flow [2023-11-12 02:16:38,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=832, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=80, PETRI_TRANSITIONS=80} [2023-11-12 02:16:38,792 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -61 predicate places. [2023-11-12 02:16:38,792 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 80 transitions, 200 flow [2023-11-12 02:16:38,793 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) [2023-11-12 02:16:38,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:38,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:38,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-12 02:16:38,794 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-12 02:16:38,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:38,794 INFO L85 PathProgramCache]: Analyzing trace with hash -58273486, now seen corresponding path program 1 times [2023-11-12 02:16:38,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:38,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352546604] [2023-11-12 02:16:38,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:38,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:38,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:39,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:39,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:39,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352546604] [2023-11-12 02:16:39,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352546604] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:39,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:16:39,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:16:39,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538083082] [2023-11-12 02:16:39,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:39,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:16:39,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:39,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:16:39,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:16:40,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 319 out of 832 [2023-11-12 02:16:40,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 80 transitions, 200 flow. Second operand has 6 states, 6 states have (on average 320.6666666666667) internal successors, (1924), 6 states have internal predecessors, (1924), 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) [2023-11-12 02:16:40,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:40,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 319 of 832 [2023-11-12 02:16:40,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:41,347 INFO L124 PetriNetUnfolderBase]: 1895/3241 cut-off events. [2023-11-12 02:16:41,347 INFO L125 PetriNetUnfolderBase]: For 153/153 co-relation queries the response was YES. [2023-11-12 02:16:41,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6570 conditions, 3241 events. 1895/3241 cut-off events. For 153/153 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 14274 event pairs, 1472 based on Foata normal form. 0/2448 useless extension candidates. Maximal degree in co-relation 6562. Up to 3075 conditions per place. [2023-11-12 02:16:41,358 INFO L140 encePairwiseOnDemand]: 824/832 looper letters, 71 selfloop transitions, 11 changer transitions 0/89 dead transitions. [2023-11-12 02:16:41,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 89 transitions, 389 flow [2023-11-12 02:16:41,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:16:41,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-12 02:16:41,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2316 transitions. [2023-11-12 02:16:41,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39766483516483514 [2023-11-12 02:16:41,367 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2316 transitions. [2023-11-12 02:16:41,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2316 transitions. [2023-11-12 02:16:41,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:41,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2316 transitions. [2023-11-12 02:16:41,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 330.85714285714283) internal successors, (2316), 7 states have internal predecessors, (2316), 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) [2023-11-12 02:16:41,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 832.0) internal successors, (6656), 8 states have internal predecessors, (6656), 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) [2023-11-12 02:16:41,387 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 832.0) internal successors, (6656), 8 states have internal predecessors, (6656), 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) [2023-11-12 02:16:41,387 INFO L175 Difference]: Start difference. First operand has 80 places, 80 transitions, 200 flow. Second operand 7 states and 2316 transitions. [2023-11-12 02:16:41,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 89 transitions, 389 flow [2023-11-12 02:16:41,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 89 transitions, 386 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:16:41,391 INFO L231 Difference]: Finished difference. Result has 88 places, 86 transitions, 257 flow [2023-11-12 02:16:41,391 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=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=257, PETRI_PLACES=88, PETRI_TRANSITIONS=86} [2023-11-12 02:16:41,392 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -53 predicate places. [2023-11-12 02:16:41,392 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 86 transitions, 257 flow [2023-11-12 02:16:41,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 320.6666666666667) internal successors, (1924), 6 states have internal predecessors, (1924), 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) [2023-11-12 02:16:41,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:41,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:41,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-12 02:16:41,394 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-12 02:16:41,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:41,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1658094543, now seen corresponding path program 1 times [2023-11-12 02:16:41,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:41,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770583795] [2023-11-12 02:16:41,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:41,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:41,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:16:41,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:16:41,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:16:41,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770583795] [2023-11-12 02:16:41,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770583795] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:16:41,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:16:41,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 02:16:41,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10944044] [2023-11-12 02:16:41,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:16:41,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:16:41,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:16:41,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:16:41,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:16:43,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 832 [2023-11-12 02:16:43,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 86 transitions, 257 flow. Second operand has 8 states, 8 states have (on average 310.375) internal successors, (2483), 8 states have internal predecessors, (2483), 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) [2023-11-12 02:16:43,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:16:43,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 832 [2023-11-12 02:16:43,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:16:43,804 INFO L124 PetriNetUnfolderBase]: 2008/3430 cut-off events. [2023-11-12 02:16:43,804 INFO L125 PetriNetUnfolderBase]: For 218/218 co-relation queries the response was YES. [2023-11-12 02:16:43,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7070 conditions, 3430 events. 2008/3430 cut-off events. For 218/218 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 15274 event pairs, 638 based on Foata normal form. 9/2641 useless extension candidates. Maximal degree in co-relation 7059. Up to 2993 conditions per place. [2023-11-12 02:16:43,825 INFO L140 encePairwiseOnDemand]: 823/832 looper letters, 99 selfloop transitions, 13 changer transitions 0/119 dead transitions. [2023-11-12 02:16:43,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 119 transitions, 557 flow [2023-11-12 02:16:43,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:16:43,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-12 02:16:43,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1961 transitions. [2023-11-12 02:16:43,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39282852564102566 [2023-11-12 02:16:43,833 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1961 transitions. [2023-11-12 02:16:43,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1961 transitions. [2023-11-12 02:16:43,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:16:43,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1961 transitions. [2023-11-12 02:16:43,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 326.8333333333333) internal successors, (1961), 6 states have internal predecessors, (1961), 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) [2023-11-12 02:16:43,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 832.0) internal successors, (5824), 7 states have internal predecessors, (5824), 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) [2023-11-12 02:16:43,851 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 832.0) internal successors, (5824), 7 states have internal predecessors, (5824), 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) [2023-11-12 02:16:43,851 INFO L175 Difference]: Start difference. First operand has 88 places, 86 transitions, 257 flow. Second operand 6 states and 1961 transitions. [2023-11-12 02:16:43,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 119 transitions, 557 flow [2023-11-12 02:16:43,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 119 transitions, 539 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-12 02:16:43,856 INFO L231 Difference]: Finished difference. Result has 92 places, 90 transitions, 298 flow [2023-11-12 02:16:43,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=832, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=298, PETRI_PLACES=92, PETRI_TRANSITIONS=90} [2023-11-12 02:16:43,857 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -49 predicate places. [2023-11-12 02:16:43,858 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 90 transitions, 298 flow [2023-11-12 02:16:43,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 310.375) internal successors, (2483), 8 states have internal predecessors, (2483), 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) [2023-11-12 02:16:43,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:16:43,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:16:43,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-12 02:16:43,859 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-12 02:16:43,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:16:43,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1801376083, now seen corresponding path program 2 times [2023-11-12 02:16:43,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:16:43,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952892360] [2023-11-12 02:16:43,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:16:43,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:16:43,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat