./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/queue_ok_longest.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a22c2b-e2e6-468e-986b-0460895912d7/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a22c2b-e2e6-468e-986b-0460895912d7/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a22c2b-e2e6-468e-986b-0460895912d7/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a22c2b-e2e6-468e-986b-0460895912d7/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/queue_ok_longest.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a22c2b-e2e6-468e-986b-0460895912d7/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a22c2b-e2e6-468e-986b-0460895912d7/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0e9bc4a9a6dcd238ac18925269a0bd7c8c54c2dafb57744151e37b58cf6eab8d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:04:32,159 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:04:32,271 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a22c2b-e2e6-468e-986b-0460895912d7/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 08:04:32,280 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:04:32,280 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:04:32,310 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:04:32,311 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:04:32,312 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:04:32,313 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:04:32,313 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:04:32,314 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:04:32,315 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:04:32,315 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:04:32,316 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:04:32,317 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:04:32,317 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:04:32,318 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:04:32,318 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:04:32,319 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 08:04:32,320 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 08:04:32,320 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 08:04:32,321 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:04:32,322 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 08:04:32,322 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 08:04:32,323 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:04:32,323 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:04:32,324 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:04:32,324 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:04:32,325 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:04:32,325 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:04:32,326 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:04:32,326 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:04:32,327 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:04:32,327 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:04:32,328 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:04:32,328 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:04:32,329 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:04:32,329 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:04:32,329 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_64a22c2b-e2e6-468e-986b-0460895912d7/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a22c2b-e2e6-468e-986b-0460895912d7/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0e9bc4a9a6dcd238ac18925269a0bd7c8c54c2dafb57744151e37b58cf6eab8d [2023-11-19 08:04:32,619 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:04:32,640 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:04:32,643 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:04:32,645 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:04:32,645 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:04:32,647 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a22c2b-e2e6-468e-986b-0460895912d7/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread/queue_ok_longest.i [2023-11-19 08:04:35,841 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:04:36,172 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:04:36,172 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a22c2b-e2e6-468e-986b-0460895912d7/sv-benchmarks/c/pthread/queue_ok_longest.i [2023-11-19 08:04:36,197 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a22c2b-e2e6-468e-986b-0460895912d7/bin/uautomizer-verify-uCwYo4JHxu/data/cf9e6f665/5db54fcff8e54823a2410ca0840db13e/FLAGc5476ff0e [2023-11-19 08:04:36,221 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a22c2b-e2e6-468e-986b-0460895912d7/bin/uautomizer-verify-uCwYo4JHxu/data/cf9e6f665/5db54fcff8e54823a2410ca0840db13e [2023-11-19 08:04:36,223 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:04:36,225 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:04:36,226 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:04:36,226 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:04:36,234 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:04:36,235 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:04:36" (1/1) ... [2023-11-19 08:04:36,236 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16802347 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:36, skipping insertion in model container [2023-11-19 08:04:36,236 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:04:36" (1/1) ... [2023-11-19 08:04:36,295 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:04:36,877 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:04:36,893 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:04:36,969 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:04:37,072 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:04:37,072 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:37 WrapperNode [2023-11-19 08:04:37,072 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:04:37,074 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:04:37,074 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:04:37,074 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:04:37,082 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:37" (1/1) ... [2023-11-19 08:04:37,126 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:37" (1/1) ... [2023-11-19 08:04:37,187 INFO L138 Inliner]: procedures = 274, calls = 59, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 208 [2023-11-19 08:04:37,188 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:04:37,189 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:04:37,189 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:04:37,190 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:04:37,200 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:37" (1/1) ... [2023-11-19 08:04:37,201 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:37" (1/1) ... [2023-11-19 08:04:37,220 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:37" (1/1) ... [2023-11-19 08:04:37,221 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:37" (1/1) ... [2023-11-19 08:04:37,242 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:37" (1/1) ... [2023-11-19 08:04:37,246 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:37" (1/1) ... [2023-11-19 08:04:37,249 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:37" (1/1) ... [2023-11-19 08:04:37,251 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:37" (1/1) ... [2023-11-19 08:04:37,261 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:04:37,262 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:04:37,262 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:04:37,262 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:04:37,263 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:37" (1/1) ... [2023-11-19 08:04:37,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:04:37,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a22c2b-e2e6-468e-986b-0460895912d7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:04:37,300 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a22c2b-e2e6-468e-986b-0460895912d7/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:04:37,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a22c2b-e2e6-468e-986b-0460895912d7/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:04:37,342 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-19 08:04:37,342 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-19 08:04:37,343 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-19 08:04:37,343 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-19 08:04:37,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 08:04:37,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 08:04:37,343 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 08:04:37,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 08:04:37,344 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 08:04:37,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:04:37,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:04:37,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:04:37,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:04:37,346 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 08:04:37,556 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:04:37,558 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:04:38,235 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:04:38,251 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:04:38,251 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 08:04:38,257 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:04:38 BoogieIcfgContainer [2023-11-19 08:04:38,258 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:04:38,260 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:04:38,261 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:04:38,264 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:04:38,265 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:04:36" (1/3) ... [2023-11-19 08:04:38,266 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1743af7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:04:38, skipping insertion in model container [2023-11-19 08:04:38,266 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:04:37" (2/3) ... [2023-11-19 08:04:38,266 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1743af7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:04:38, skipping insertion in model container [2023-11-19 08:04:38,267 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:04:38" (3/3) ... [2023-11-19 08:04:38,268 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_ok_longest.i [2023-11-19 08:04:38,291 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:04:38,291 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 61 error locations. [2023-11-19 08:04:38,292 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 08:04:38,460 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 08:04:38,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 290 places, 298 transitions, 610 flow [2023-11-19 08:04:38,673 INFO L124 PetriNetUnfolderBase]: 15/296 cut-off events. [2023-11-19 08:04:38,673 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 08:04:38,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305 conditions, 296 events. 15/296 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 704 event pairs, 0 based on Foata normal form. 0/220 useless extension candidates. Maximal degree in co-relation 196. Up to 3 conditions per place. [2023-11-19 08:04:38,689 INFO L82 GeneralOperation]: Start removeDead. Operand has 290 places, 298 transitions, 610 flow [2023-11-19 08:04:38,700 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 283 places, 291 transitions, 594 flow [2023-11-19 08:04:38,704 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:04:38,715 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 283 places, 291 transitions, 594 flow [2023-11-19 08:04:38,718 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 283 places, 291 transitions, 594 flow [2023-11-19 08:04:38,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 283 places, 291 transitions, 594 flow [2023-11-19 08:04:38,788 INFO L124 PetriNetUnfolderBase]: 15/291 cut-off events. [2023-11-19 08:04:38,789 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 08:04:38,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 291 events. 15/291 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 686 event pairs, 0 based on Foata normal form. 0/216 useless extension candidates. Maximal degree in co-relation 196. Up to 3 conditions per place. [2023-11-19 08:04:38,804 INFO L119 LiptonReduction]: Number of co-enabled transitions 19748 [2023-11-19 08:04:55,475 INFO L134 LiptonReduction]: Checked pairs total: 61464 [2023-11-19 08:04:55,476 INFO L136 LiptonReduction]: Total number of compositions: 393 [2023-11-19 08:04:55,492 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:04:55,499 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;@4d3b0ad0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:04:55,499 INFO L358 AbstractCegarLoop]: Starting to check reachability of 104 error locations. [2023-11-19 08:04:55,501 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:04:55,501 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-11-19 08:04:55,501 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:04:55,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:55,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-19 08:04:55,503 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 08:04:55,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:55,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1256, now seen corresponding path program 1 times [2023-11-19 08:04:55,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:55,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028716651] [2023-11-19 08:04:55,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:55,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:55,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:55,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:55,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:55,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028716651] [2023-11-19 08:04:55,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028716651] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:55,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:04:55,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-19 08:04:55,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323652293] [2023-11-19 08:04:55,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:55,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 08:04:55,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:55,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 08:04:55,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 08:04:55,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 691 [2023-11-19 08:04:55,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 106 transitions, 224 flow. Second operand has 2 states, 2 states have (on average 285.5) internal successors, (571), 2 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:55,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:55,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 691 [2023-11-19 08:04:55,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:56,899 INFO L124 PetriNetUnfolderBase]: 4087/6349 cut-off events. [2023-11-19 08:04:56,899 INFO L125 PetriNetUnfolderBase]: For 89/89 co-relation queries the response was YES. [2023-11-19 08:04:56,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12655 conditions, 6349 events. 4087/6349 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 35186 event pairs, 3451 based on Foata normal form. 0/3225 useless extension candidates. Maximal degree in co-relation 12174. Up to 6236 conditions per place. [2023-11-19 08:04:56,960 INFO L140 encePairwiseOnDemand]: 655/691 looper letters, 63 selfloop transitions, 0 changer transitions 0/70 dead transitions. [2023-11-19 08:04:56,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 70 transitions, 278 flow [2023-11-19 08:04:56,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 08:04:56,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 08:04:56,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 669 transitions. [2023-11-19 08:04:56,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4840810419681621 [2023-11-19 08:04:56,982 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 669 transitions. [2023-11-19 08:04:56,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 669 transitions. [2023-11-19 08:04:56,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:56,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 669 transitions. [2023-11-19 08:04:56,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 334.5) internal successors, (669), 2 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:57,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 691.0) internal successors, (2073), 3 states have internal predecessors, (2073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:57,007 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 691.0) internal successors, (2073), 3 states have internal predecessors, (2073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:57,009 INFO L175 Difference]: Start difference. First operand has 106 places, 106 transitions, 224 flow. Second operand 2 states and 669 transitions. [2023-11-19 08:04:57,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 70 transitions, 278 flow [2023-11-19 08:04:57,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 70 transitions, 270 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 08:04:57,022 INFO L231 Difference]: Finished difference. Result has 67 places, 70 transitions, 144 flow [2023-11-19 08:04:57,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=144, PETRI_PLACES=67, PETRI_TRANSITIONS=70} [2023-11-19 08:04:57,029 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -39 predicate places. [2023-11-19 08:04:57,029 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 70 transitions, 144 flow [2023-11-19 08:04:57,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 285.5) internal successors, (571), 2 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:57,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:57,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 08:04:57,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 08:04:57,032 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 08:04:57,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:57,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1245768, now seen corresponding path program 1 times [2023-11-19 08:04:57,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:57,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248567016] [2023-11-19 08:04:57,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:57,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:57,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:57,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:57,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:57,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248567016] [2023-11-19 08:04:57,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248567016] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:57,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:04:57,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:04:57,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162877210] [2023-11-19 08:04:57,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:57,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:04:57,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:57,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:04:57,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:04:57,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 275 out of 691 [2023-11-19 08:04:57,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 70 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 276.0) internal successors, (828), 3 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:57,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:57,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 275 of 691 [2023-11-19 08:04:57,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:58,423 INFO L124 PetriNetUnfolderBase]: 4037/6251 cut-off events. [2023-11-19 08:04:58,423 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-11-19 08:04:58,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12414 conditions, 6251 events. 4037/6251 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 34392 event pairs, 3408 based on Foata normal form. 0/3195 useless extension candidates. Maximal degree in co-relation 12411. Up to 6139 conditions per place. [2023-11-19 08:04:58,478 INFO L140 encePairwiseOnDemand]: 687/691 looper letters, 59 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2023-11-19 08:04:58,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 68 transitions, 262 flow [2023-11-19 08:04:58,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:04:58,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:04:58,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 888 transitions. [2023-11-19 08:04:58,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4283646888567294 [2023-11-19 08:04:58,484 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 888 transitions. [2023-11-19 08:04:58,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 888 transitions. [2023-11-19 08:04:58,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:58,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 888 transitions. [2023-11-19 08:04:58,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 296.0) internal successors, (888), 3 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:58,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 691.0) internal successors, (2764), 4 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:58,498 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 691.0) internal successors, (2764), 4 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:58,499 INFO L175 Difference]: Start difference. First operand has 67 places, 70 transitions, 144 flow. Second operand 3 states and 888 transitions. [2023-11-19 08:04:58,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 68 transitions, 262 flow [2023-11-19 08:04:58,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 68 transitions, 262 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 08:04:58,504 INFO L231 Difference]: Finished difference. Result has 67 places, 68 transitions, 144 flow [2023-11-19 08:04:58,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=67, PETRI_TRANSITIONS=68} [2023-11-19 08:04:58,508 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -39 predicate places. [2023-11-19 08:04:58,509 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 68 transitions, 144 flow [2023-11-19 08:04:58,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 276.0) internal successors, (828), 3 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:58,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:58,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 08:04:58,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 08:04:58,513 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 08:04:58,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:58,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1245769, now seen corresponding path program 1 times [2023-11-19 08:04:58,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:58,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070556021] [2023-11-19 08:04:58,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:58,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:58,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:04:58,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:04:58,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:04:58,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070556021] [2023-11-19 08:04:58,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070556021] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:04:58,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:04:58,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:04:58,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494461057] [2023-11-19 08:04:58,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:04:58,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:04:58,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:04:58,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:04:58,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:04:58,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 691 [2023-11-19 08:04:58,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 68 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 280.0) internal successors, (840), 3 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:58,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:04:58,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 691 [2023-11-19 08:04:58,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:04:59,723 INFO L124 PetriNetUnfolderBase]: 3987/6153 cut-off events. [2023-11-19 08:04:59,723 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-11-19 08:04:59,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12224 conditions, 6153 events. 3987/6153 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 33652 event pairs, 3365 based on Foata normal form. 0/3165 useless extension candidates. Maximal degree in co-relation 12220. Up to 6044 conditions per place. [2023-11-19 08:04:59,768 INFO L140 encePairwiseOnDemand]: 687/691 looper letters, 57 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2023-11-19 08:04:59,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 66 transitions, 258 flow [2023-11-19 08:04:59,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:04:59,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:04:59,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 898 transitions. [2023-11-19 08:04:59,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331886155330439 [2023-11-19 08:04:59,774 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 898 transitions. [2023-11-19 08:04:59,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 898 transitions. [2023-11-19 08:04:59,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:04:59,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 898 transitions. [2023-11-19 08:04:59,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 299.3333333333333) internal successors, (898), 3 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:59,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 691.0) internal successors, (2764), 4 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:59,789 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 691.0) internal successors, (2764), 4 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:59,789 INFO L175 Difference]: Start difference. First operand has 67 places, 68 transitions, 144 flow. Second operand 3 states and 898 transitions. [2023-11-19 08:04:59,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 66 transitions, 258 flow [2023-11-19 08:04:59,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 66 transitions, 254 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:04:59,793 INFO L231 Difference]: Finished difference. Result has 65 places, 66 transitions, 140 flow [2023-11-19 08:04:59,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=65, PETRI_TRANSITIONS=66} [2023-11-19 08:04:59,794 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -41 predicate places. [2023-11-19 08:04:59,794 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 66 transitions, 140 flow [2023-11-19 08:04:59,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 280.0) internal successors, (840), 3 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:04:59,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:04:59,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 08:04:59,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 08:04:59,796 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 08:04:59,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:04:59,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1197200326, now seen corresponding path program 1 times [2023-11-19 08:04:59,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:04:59,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580175041] [2023-11-19 08:04:59,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:04:59,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:04:59,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:00,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:00,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:00,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580175041] [2023-11-19 08:05:00,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580175041] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:00,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:00,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:05:00,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720799184] [2023-11-19 08:05:00,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:00,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:05:00,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:00,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:05:00,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:05:00,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 691 [2023-11-19 08:05:00,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 66 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 275.6666666666667) internal successors, (827), 3 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:00,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:00,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 691 [2023-11-19 08:05:00,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:01,199 INFO L124 PetriNetUnfolderBase]: 4093/6374 cut-off events. [2023-11-19 08:05:01,199 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-11-19 08:05:01,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12666 conditions, 6374 events. 4093/6374 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 35289 event pairs, 2902 based on Foata normal form. 0/3181 useless extension candidates. Maximal degree in co-relation 12662. Up to 6257 conditions per place. [2023-11-19 08:05:01,238 INFO L140 encePairwiseOnDemand]: 686/691 looper letters, 66 selfloop transitions, 4 changer transitions 0/76 dead transitions. [2023-11-19 08:05:01,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 76 transitions, 300 flow [2023-11-19 08:05:01,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:05:01,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:05:01,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 893 transitions. [2023-11-19 08:05:01,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43077665219488664 [2023-11-19 08:05:01,243 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 893 transitions. [2023-11-19 08:05:01,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 893 transitions. [2023-11-19 08:05:01,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:01,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 893 transitions. [2023-11-19 08:05:01,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 297.6666666666667) internal successors, (893), 3 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:01,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 691.0) internal successors, (2764), 4 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:01,257 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 691.0) internal successors, (2764), 4 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:01,257 INFO L175 Difference]: Start difference. First operand has 65 places, 66 transitions, 140 flow. Second operand 3 states and 893 transitions. [2023-11-19 08:05:01,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 76 transitions, 300 flow [2023-11-19 08:05:01,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 76 transitions, 296 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:05:01,263 INFO L231 Difference]: Finished difference. Result has 66 places, 69 transitions, 162 flow [2023-11-19 08:05:01,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=66, PETRI_TRANSITIONS=69} [2023-11-19 08:05:01,265 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -40 predicate places. [2023-11-19 08:05:01,266 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 69 transitions, 162 flow [2023-11-19 08:05:01,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 275.6666666666667) internal successors, (827), 3 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:01,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:01,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 08:05:01,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 08:05:01,267 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 08:05:01,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:01,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1197200323, now seen corresponding path program 1 times [2023-11-19 08:05:01,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:01,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091948185] [2023-11-19 08:05:01,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:01,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:01,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:01,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:01,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:01,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091948185] [2023-11-19 08:05:01,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091948185] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:01,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:01,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:05:01,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203431232] [2023-11-19 08:05:01,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:01,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:05:01,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:01,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:05:01,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:05:01,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 283 out of 691 [2023-11-19 08:05:01,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 69 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 284.6666666666667) internal successors, (854), 3 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:01,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:01,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 283 of 691 [2023-11-19 08:05:01,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:02,242 INFO L124 PetriNetUnfolderBase]: 3390/5227 cut-off events. [2023-11-19 08:05:02,243 INFO L125 PetriNetUnfolderBase]: For 224/311 co-relation queries the response was YES. [2023-11-19 08:05:02,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10604 conditions, 5227 events. 3390/5227 cut-off events. For 224/311 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 27689 event pairs, 2802 based on Foata normal form. 0/2961 useless extension candidates. Maximal degree in co-relation 10599. Up to 5126 conditions per place. [2023-11-19 08:05:02,274 INFO L140 encePairwiseOnDemand]: 686/691 looper letters, 56 selfloop transitions, 1 changer transitions 0/65 dead transitions. [2023-11-19 08:05:02,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 65 transitions, 268 flow [2023-11-19 08:05:02,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:05:02,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:05:02,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 908 transitions. [2023-11-19 08:05:02,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380125422093584 [2023-11-19 08:05:02,279 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 908 transitions. [2023-11-19 08:05:02,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 908 transitions. [2023-11-19 08:05:02,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:02,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 908 transitions. [2023-11-19 08:05:02,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 302.6666666666667) internal successors, (908), 3 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:02,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 691.0) internal successors, (2764), 4 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:02,292 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 691.0) internal successors, (2764), 4 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:02,292 INFO L175 Difference]: Start difference. First operand has 66 places, 69 transitions, 162 flow. Second operand 3 states and 908 transitions. [2023-11-19 08:05:02,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 65 transitions, 268 flow [2023-11-19 08:05:02,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 65 transitions, 264 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:05:02,295 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 152 flow [2023-11-19 08:05:02,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=63, PETRI_TRANSITIONS=65} [2023-11-19 08:05:02,298 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -43 predicate places. [2023-11-19 08:05:02,298 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 152 flow [2023-11-19 08:05:02,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 284.6666666666667) internal successors, (854), 3 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:02,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:02,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 08:05:02,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 08:05:02,300 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 08:05:02,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:02,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1197200324, now seen corresponding path program 1 times [2023-11-19 08:05:02,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:02,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339468361] [2023-11-19 08:05:02,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:02,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:02,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:02,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:02,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:02,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339468361] [2023-11-19 08:05:02,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339468361] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:02,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:02,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:05:02,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720696459] [2023-11-19 08:05:02,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:02,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:05:02,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:02,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:05:02,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:05:02,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 282 out of 691 [2023-11-19 08:05:02,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 283.6666666666667) internal successors, (851), 3 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:02,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:02,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 282 of 691 [2023-11-19 08:05:02,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:03,097 INFO L124 PetriNetUnfolderBase]: 2956/4550 cut-off events. [2023-11-19 08:05:03,097 INFO L125 PetriNetUnfolderBase]: For 204/283 co-relation queries the response was YES. [2023-11-19 08:05:03,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9232 conditions, 4550 events. 2956/4550 cut-off events. For 204/283 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 23354 event pairs, 2409 based on Foata normal form. 0/2720 useless extension candidates. Maximal degree in co-relation 9227. Up to 4457 conditions per place. [2023-11-19 08:05:03,124 INFO L140 encePairwiseOnDemand]: 686/691 looper letters, 52 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2023-11-19 08:05:03,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 62 transitions, 254 flow [2023-11-19 08:05:03,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:05:03,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:05:03,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 901 transitions. [2023-11-19 08:05:03,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43463579353593823 [2023-11-19 08:05:03,129 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 901 transitions. [2023-11-19 08:05:03,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 901 transitions. [2023-11-19 08:05:03,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:03,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 901 transitions. [2023-11-19 08:05:03,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 300.3333333333333) internal successors, (901), 3 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:03,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 691.0) internal successors, (2764), 4 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:03,141 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 691.0) internal successors, (2764), 4 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:03,142 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 152 flow. Second operand 3 states and 901 transitions. [2023-11-19 08:05:03,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 62 transitions, 254 flow [2023-11-19 08:05:03,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 62 transitions, 253 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:05:03,147 INFO L231 Difference]: Finished difference. Result has 61 places, 62 transitions, 149 flow [2023-11-19 08:05:03,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=149, PETRI_PLACES=61, PETRI_TRANSITIONS=62} [2023-11-19 08:05:03,150 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -45 predicate places. [2023-11-19 08:05:03,150 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 62 transitions, 149 flow [2023-11-19 08:05:03,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 283.6666666666667) internal successors, (851), 3 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:03,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:03,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 08:05:03,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 08:05:03,152 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 08:05:03,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:03,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1197212170, now seen corresponding path program 1 times [2023-11-19 08:05:03,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:03,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920300010] [2023-11-19 08:05:03,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:03,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:03,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:03,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:03,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:03,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920300010] [2023-11-19 08:05:03,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920300010] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:03,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:03,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:05:03,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793346036] [2023-11-19 08:05:03,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:03,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:05:03,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:03,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:05:03,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:05:03,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 691 [2023-11-19 08:05:03,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 62 transitions, 149 flow. Second operand has 4 states, 4 states have (on average 278.25) internal successors, (1113), 4 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:03,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:03,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 691 [2023-11-19 08:05:03,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:04,015 INFO L124 PetriNetUnfolderBase]: 2149/3368 cut-off events. [2023-11-19 08:05:04,015 INFO L125 PetriNetUnfolderBase]: For 162/221 co-relation queries the response was YES. [2023-11-19 08:05:04,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6846 conditions, 3368 events. 2149/3368 cut-off events. For 162/221 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16777 event pairs, 1733 based on Foata normal form. 0/2168 useless extension candidates. Maximal degree in co-relation 6841. Up to 3293 conditions per place. [2023-11-19 08:05:04,036 INFO L140 encePairwiseOnDemand]: 688/691 looper letters, 51 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-11-19 08:05:04,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 61 transitions, 253 flow [2023-11-19 08:05:04,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:05:04,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:05:04,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 883 transitions. [2023-11-19 08:05:04,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4259527255185721 [2023-11-19 08:05:04,041 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 883 transitions. [2023-11-19 08:05:04,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 883 transitions. [2023-11-19 08:05:04,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:04,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 883 transitions. [2023-11-19 08:05:04,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 294.3333333333333) internal successors, (883), 3 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:04,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 691.0) internal successors, (2764), 4 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:04,052 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 691.0) internal successors, (2764), 4 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:04,052 INFO L175 Difference]: Start difference. First operand has 61 places, 62 transitions, 149 flow. Second operand 3 states and 883 transitions. [2023-11-19 08:05:04,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 61 transitions, 253 flow [2023-11-19 08:05:04,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 61 transitions, 249 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:05:04,054 INFO L231 Difference]: Finished difference. Result has 60 places, 61 transitions, 147 flow [2023-11-19 08:05:04,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=147, PETRI_PLACES=60, PETRI_TRANSITIONS=61} [2023-11-19 08:05:04,056 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -46 predicate places. [2023-11-19 08:05:04,056 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 61 transitions, 147 flow [2023-11-19 08:05:04,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 278.25) internal successors, (1113), 4 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:04,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:04,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 08:05:04,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 08:05:04,058 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 08:05:04,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:04,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1197212169, now seen corresponding path program 1 times [2023-11-19 08:05:04,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:04,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099657832] [2023-11-19 08:05:04,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:04,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:04,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:04,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:04,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:04,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099657832] [2023-11-19 08:05:04,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099657832] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:04,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:04,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:05:04,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771295069] [2023-11-19 08:05:04,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:04,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:05:04,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:04,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:05:04,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:05:04,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 691 [2023-11-19 08:05:04,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 61 transitions, 147 flow. Second operand has 4 states, 4 states have (on average 272.25) internal successors, (1089), 4 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:04,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:04,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 691 [2023-11-19 08:05:04,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:04,688 INFO L124 PetriNetUnfolderBase]: 1342/2186 cut-off events. [2023-11-19 08:05:04,688 INFO L125 PetriNetUnfolderBase]: For 120/159 co-relation queries the response was YES. [2023-11-19 08:05:04,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4458 conditions, 2186 events. 1342/2186 cut-off events. For 120/159 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 10525 event pairs, 1057 based on Foata normal form. 0/1616 useless extension candidates. Maximal degree in co-relation 4453. Up to 2129 conditions per place. [2023-11-19 08:05:04,702 INFO L140 encePairwiseOnDemand]: 688/691 looper letters, 50 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2023-11-19 08:05:04,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 60 transitions, 249 flow [2023-11-19 08:05:04,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:05:04,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:05:04,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 864 transitions. [2023-11-19 08:05:04,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41678726483357453 [2023-11-19 08:05:04,709 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 864 transitions. [2023-11-19 08:05:04,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 864 transitions. [2023-11-19 08:05:04,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:04,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 864 transitions. [2023-11-19 08:05:04,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 288.0) internal successors, (864), 3 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:04,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 691.0) internal successors, (2764), 4 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:04,719 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 691.0) internal successors, (2764), 4 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:04,720 INFO L175 Difference]: Start difference. First operand has 60 places, 61 transitions, 147 flow. Second operand 3 states and 864 transitions. [2023-11-19 08:05:04,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 60 transitions, 249 flow [2023-11-19 08:05:04,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 60 transitions, 245 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:05:04,723 INFO L231 Difference]: Finished difference. Result has 59 places, 60 transitions, 145 flow [2023-11-19 08:05:04,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=145, PETRI_PLACES=59, PETRI_TRANSITIONS=60} [2023-11-19 08:05:04,724 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -47 predicate places. [2023-11-19 08:05:04,725 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 60 transitions, 145 flow [2023-11-19 08:05:04,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 272.25) internal successors, (1089), 4 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:04,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:04,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 08:05:04,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 08:05:04,726 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 08:05:04,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:04,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1541341198, now seen corresponding path program 1 times [2023-11-19 08:05:04,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:04,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729842601] [2023-11-19 08:05:04,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:04,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:04,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:05,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:05,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:05,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729842601] [2023-11-19 08:05:05,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729842601] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:05,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:05,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:05:05,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526864547] [2023-11-19 08:05:05,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:05,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:05:05,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:05,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:05:05,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:05:05,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 270 out of 691 [2023-11-19 08:05:05,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 60 transitions, 145 flow. Second operand has 4 states, 4 states have (on average 271.5) internal successors, (1086), 4 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:05,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:05,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 270 of 691 [2023-11-19 08:05:05,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:05,943 INFO L124 PetriNetUnfolderBase]: 1730/2853 cut-off events. [2023-11-19 08:05:05,943 INFO L125 PetriNetUnfolderBase]: For 129/129 co-relation queries the response was YES. [2023-11-19 08:05:05,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5840 conditions, 2853 events. 1730/2853 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 14970 event pairs, 389 based on Foata normal form. 27/2131 useless extension candidates. Maximal degree in co-relation 5835. Up to 2268 conditions per place. [2023-11-19 08:05:05,959 INFO L140 encePairwiseOnDemand]: 685/691 looper letters, 74 selfloop transitions, 7 changer transitions 0/87 dead transitions. [2023-11-19 08:05:05,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 87 transitions, 370 flow [2023-11-19 08:05:05,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:05:05,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 08:05:05,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1160 transitions. [2023-11-19 08:05:05,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4196816208393632 [2023-11-19 08:05:05,966 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1160 transitions. [2023-11-19 08:05:05,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1160 transitions. [2023-11-19 08:05:05,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:05,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1160 transitions. [2023-11-19 08:05:05,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 290.0) internal successors, (1160), 4 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:05,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 691.0) internal successors, (3455), 5 states have internal predecessors, (3455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:05,978 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 691.0) internal successors, (3455), 5 states have internal predecessors, (3455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:05,978 INFO L175 Difference]: Start difference. First operand has 59 places, 60 transitions, 145 flow. Second operand 4 states and 1160 transitions. [2023-11-19 08:05:05,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 87 transitions, 370 flow [2023-11-19 08:05:05,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 87 transitions, 364 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:05:05,981 INFO L231 Difference]: Finished difference. Result has 61 places, 64 transitions, 184 flow [2023-11-19 08:05:05,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=184, PETRI_PLACES=61, PETRI_TRANSITIONS=64} [2023-11-19 08:05:05,982 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -45 predicate places. [2023-11-19 08:05:05,983 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 64 transitions, 184 flow [2023-11-19 08:05:05,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 271.5) internal successors, (1086), 4 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:05,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:05,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 08:05:05,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 08:05:05,984 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 08:05:05,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:05,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1541494502, now seen corresponding path program 1 times [2023-11-19 08:05:05,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:05,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328829105] [2023-11-19 08:05:05,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:05,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:06,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:06,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:06,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:06,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328829105] [2023-11-19 08:05:06,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328829105] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:06,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:06,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:05:06,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572713295] [2023-11-19 08:05:06,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:06,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:05:06,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:06,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:05:06,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:05:06,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 273 out of 691 [2023-11-19 08:05:06,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 64 transitions, 184 flow. Second operand has 4 states, 4 states have (on average 274.5) internal successors, (1098), 4 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:06,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:06,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 273 of 691 [2023-11-19 08:05:06,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:06,829 INFO L124 PetriNetUnfolderBase]: 1521/2548 cut-off events. [2023-11-19 08:05:06,829 INFO L125 PetriNetUnfolderBase]: For 286/286 co-relation queries the response was YES. [2023-11-19 08:05:06,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5297 conditions, 2548 events. 1521/2548 cut-off events. For 286/286 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 13573 event pairs, 740 based on Foata normal form. 72/2070 useless extension candidates. Maximal degree in co-relation 5291. Up to 1476 conditions per place. [2023-11-19 08:05:06,847 INFO L140 encePairwiseOnDemand]: 684/691 looper letters, 74 selfloop transitions, 5 changer transitions 0/88 dead transitions. [2023-11-19 08:05:06,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 88 transitions, 386 flow [2023-11-19 08:05:06,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:05:06,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 08:05:06,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1168 transitions. [2023-11-19 08:05:06,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42257597684515197 [2023-11-19 08:05:06,854 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1168 transitions. [2023-11-19 08:05:06,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1168 transitions. [2023-11-19 08:05:06,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:06,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1168 transitions. [2023-11-19 08:05:06,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 292.0) internal successors, (1168), 4 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:06,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 691.0) internal successors, (3455), 5 states have internal predecessors, (3455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:06,866 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 691.0) internal successors, (3455), 5 states have internal predecessors, (3455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:06,866 INFO L175 Difference]: Start difference. First operand has 61 places, 64 transitions, 184 flow. Second operand 4 states and 1168 transitions. [2023-11-19 08:05:06,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 88 transitions, 386 flow [2023-11-19 08:05:06,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 88 transitions, 381 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 08:05:06,874 INFO L231 Difference]: Finished difference. Result has 61 places, 60 transitions, 168 flow [2023-11-19 08:05:06,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=61, PETRI_TRANSITIONS=60} [2023-11-19 08:05:06,876 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -45 predicate places. [2023-11-19 08:05:06,876 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 60 transitions, 168 flow [2023-11-19 08:05:06,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 274.5) internal successors, (1098), 4 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:06,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:06,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:06,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 08:05:06,878 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 08:05:06,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:06,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1471121744, now seen corresponding path program 1 times [2023-11-19 08:05:06,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:06,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530796243] [2023-11-19 08:05:06,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:06,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:06,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:06,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:06,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:06,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530796243] [2023-11-19 08:05:06,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530796243] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:06,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:06,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:05:06,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994440381] [2023-11-19 08:05:06,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:06,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:05:06,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:06,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:05:06,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:05:06,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 280 out of 691 [2023-11-19 08:05:06,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 60 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 283.0) internal successors, (849), 3 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:06,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:06,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 280 of 691 [2023-11-19 08:05:06,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:07,174 INFO L124 PetriNetUnfolderBase]: 431/858 cut-off events. [2023-11-19 08:05:07,175 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2023-11-19 08:05:07,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1817 conditions, 858 events. 431/858 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4359 event pairs, 262 based on Foata normal form. 38/781 useless extension candidates. Maximal degree in co-relation 1811. Up to 435 conditions per place. [2023-11-19 08:05:07,180 INFO L140 encePairwiseOnDemand]: 687/691 looper letters, 61 selfloop transitions, 3 changer transitions 0/72 dead transitions. [2023-11-19 08:05:07,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 72 transitions, 332 flow [2023-11-19 08:05:07,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:05:07,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:05:07,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 900 transitions. [2023-11-19 08:05:07,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4341534008683068 [2023-11-19 08:05:07,187 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 900 transitions. [2023-11-19 08:05:07,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 900 transitions. [2023-11-19 08:05:07,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:07,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 900 transitions. [2023-11-19 08:05:07,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 300.0) internal successors, (900), 3 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:07,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 691.0) internal successors, (2764), 4 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:07,198 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 691.0) internal successors, (2764), 4 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:07,198 INFO L175 Difference]: Start difference. First operand has 61 places, 60 transitions, 168 flow. Second operand 3 states and 900 transitions. [2023-11-19 08:05:07,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 72 transitions, 332 flow [2023-11-19 08:05:07,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 72 transitions, 322 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-19 08:05:07,201 INFO L231 Difference]: Finished difference. Result has 61 places, 60 transitions, 169 flow [2023-11-19 08:05:07,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=169, PETRI_PLACES=61, PETRI_TRANSITIONS=60} [2023-11-19 08:05:07,202 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -45 predicate places. [2023-11-19 08:05:07,203 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 60 transitions, 169 flow [2023-11-19 08:05:07,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 283.0) internal successors, (849), 3 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:07,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:07,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:07,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 08:05:07,204 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 08:05:07,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:07,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1024067660, now seen corresponding path program 1 times [2023-11-19 08:05:07,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:07,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552560981] [2023-11-19 08:05:07,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:07,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:07,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:07,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:07,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:07,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552560981] [2023-11-19 08:05:07,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552560981] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:07,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:07,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 08:05:07,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895595008] [2023-11-19 08:05:07,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:07,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:05:07,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:07,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:05:07,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 08:05:07,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 268 out of 691 [2023-11-19 08:05:07,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 60 transitions, 169 flow. Second operand has 5 states, 5 states have (on average 270.2) internal successors, (1351), 5 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:07,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:07,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 268 of 691 [2023-11-19 08:05:07,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:08,145 INFO L124 PetriNetUnfolderBase]: 426/856 cut-off events. [2023-11-19 08:05:08,145 INFO L125 PetriNetUnfolderBase]: For 97/97 co-relation queries the response was YES. [2023-11-19 08:05:08,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1824 conditions, 856 events. 426/856 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4374 event pairs, 283 based on Foata normal form. 0/743 useless extension candidates. Maximal degree in co-relation 1817. Up to 789 conditions per place. [2023-11-19 08:05:08,150 INFO L140 encePairwiseOnDemand]: 684/691 looper letters, 58 selfloop transitions, 9 changer transitions 0/73 dead transitions. [2023-11-19 08:05:08,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 73 transitions, 335 flow [2023-11-19 08:05:08,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:05:08,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 08:05:08,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1673 transitions. [2023-11-19 08:05:08,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035214664737096 [2023-11-19 08:05:08,159 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1673 transitions. [2023-11-19 08:05:08,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1673 transitions. [2023-11-19 08:05:08,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:08,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1673 transitions. [2023-11-19 08:05:08,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 278.8333333333333) internal successors, (1673), 6 states have internal predecessors, (1673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:08,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 691.0) internal successors, (4837), 7 states have internal predecessors, (4837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:08,174 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 691.0) internal successors, (4837), 7 states have internal predecessors, (4837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:08,174 INFO L175 Difference]: Start difference. First operand has 61 places, 60 transitions, 169 flow. Second operand 6 states and 1673 transitions. [2023-11-19 08:05:08,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 73 transitions, 335 flow [2023-11-19 08:05:08,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 73 transitions, 329 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:05:08,178 INFO L231 Difference]: Finished difference. Result has 67 places, 66 transitions, 218 flow [2023-11-19 08:05:08,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=218, PETRI_PLACES=67, PETRI_TRANSITIONS=66} [2023-11-19 08:05:08,179 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -39 predicate places. [2023-11-19 08:05:08,179 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 66 transitions, 218 flow [2023-11-19 08:05:08,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 270.2) internal successors, (1351), 5 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:08,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:08,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:08,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 08:05:08,180 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 08:05:08,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:08,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1828466354, now seen corresponding path program 1 times [2023-11-19 08:05:08,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:08,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451012302] [2023-11-19 08:05:08,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:08,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:08,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:08,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:08,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:08,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451012302] [2023-11-19 08:05:08,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451012302] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:08,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:08,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 08:05:08,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673784357] [2023-11-19 08:05:08,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:08,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 08:05:08,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:08,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 08:05:08,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:05:09,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 691 [2023-11-19 08:05:09,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 66 transitions, 218 flow. Second operand has 7 states, 7 states have (on average 264.7142857142857) internal successors, (1853), 7 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:09,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:09,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 691 [2023-11-19 08:05:09,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:09,756 INFO L124 PetriNetUnfolderBase]: 474/952 cut-off events. [2023-11-19 08:05:09,756 INFO L125 PetriNetUnfolderBase]: For 164/166 co-relation queries the response was YES. [2023-11-19 08:05:09,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2111 conditions, 952 events. 474/952 cut-off events. For 164/166 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 5005 event pairs, 160 based on Foata normal form. 7/865 useless extension candidates. Maximal degree in co-relation 2101. Up to 536 conditions per place. [2023-11-19 08:05:09,763 INFO L140 encePairwiseOnDemand]: 680/691 looper letters, 82 selfloop transitions, 18 changer transitions 0/106 dead transitions. [2023-11-19 08:05:09,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 106 transitions, 521 flow [2023-11-19 08:05:09,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 08:05:09,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 08:05:09,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1937 transitions. [2023-11-19 08:05:09,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40045482737233823 [2023-11-19 08:05:09,775 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1937 transitions. [2023-11-19 08:05:09,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1937 transitions. [2023-11-19 08:05:09,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:09,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1937 transitions. [2023-11-19 08:05:09,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 276.7142857142857) internal successors, (1937), 7 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:09,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 691.0) internal successors, (5528), 8 states have internal predecessors, (5528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:09,797 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 691.0) internal successors, (5528), 8 states have internal predecessors, (5528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:09,798 INFO L175 Difference]: Start difference. First operand has 67 places, 66 transitions, 218 flow. Second operand 7 states and 1937 transitions. [2023-11-19 08:05:09,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 106 transitions, 521 flow [2023-11-19 08:05:09,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 106 transitions, 513 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-19 08:05:09,804 INFO L231 Difference]: Finished difference. Result has 76 places, 73 transitions, 318 flow [2023-11-19 08:05:09,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=318, PETRI_PLACES=76, PETRI_TRANSITIONS=73} [2023-11-19 08:05:09,807 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -30 predicate places. [2023-11-19 08:05:09,807 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 73 transitions, 318 flow [2023-11-19 08:05:09,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 264.7142857142857) internal successors, (1853), 7 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:09,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:09,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:09,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-19 08:05:09,809 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 08:05:09,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:09,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1570389990, now seen corresponding path program 2 times [2023-11-19 08:05:09,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:09,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495427352] [2023-11-19 08:05:09,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:09,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:09,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:10,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:10,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:10,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495427352] [2023-11-19 08:05:10,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495427352] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:10,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:10,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 08:05:10,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718792042] [2023-11-19 08:05:10,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:10,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 08:05:10,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:10,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 08:05:10,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:05:11,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 691 [2023-11-19 08:05:11,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 73 transitions, 318 flow. Second operand has 7 states, 7 states have (on average 265.7142857142857) internal successors, (1860), 7 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:11,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:11,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 691 [2023-11-19 08:05:11,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:11,469 INFO L124 PetriNetUnfolderBase]: 514/1033 cut-off events. [2023-11-19 08:05:11,470 INFO L125 PetriNetUnfolderBase]: For 444/444 co-relation queries the response was YES. [2023-11-19 08:05:11,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2507 conditions, 1033 events. 514/1033 cut-off events. For 444/444 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5629 event pairs, 357 based on Foata normal form. 7/943 useless extension candidates. Maximal degree in co-relation 2493. Up to 869 conditions per place. [2023-11-19 08:05:11,477 INFO L140 encePairwiseOnDemand]: 684/691 looper letters, 74 selfloop transitions, 11 changer transitions 0/91 dead transitions. [2023-11-19 08:05:11,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 91 transitions, 542 flow [2023-11-19 08:05:11,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 08:05:11,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 08:05:11,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1923 transitions. [2023-11-19 08:05:11,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39756047136654954 [2023-11-19 08:05:11,487 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1923 transitions. [2023-11-19 08:05:11,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1923 transitions. [2023-11-19 08:05:11,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:11,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1923 transitions. [2023-11-19 08:05:11,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 274.7142857142857) internal successors, (1923), 7 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:11,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 691.0) internal successors, (5528), 8 states have internal predecessors, (5528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:11,506 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 691.0) internal successors, (5528), 8 states have internal predecessors, (5528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:11,506 INFO L175 Difference]: Start difference. First operand has 76 places, 73 transitions, 318 flow. Second operand 7 states and 1923 transitions. [2023-11-19 08:05:11,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 91 transitions, 542 flow [2023-11-19 08:05:11,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 91 transitions, 524 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-19 08:05:11,514 INFO L231 Difference]: Finished difference. Result has 83 places, 75 transitions, 350 flow [2023-11-19 08:05:11,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=350, PETRI_PLACES=83, PETRI_TRANSITIONS=75} [2023-11-19 08:05:11,515 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -23 predicate places. [2023-11-19 08:05:11,516 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 75 transitions, 350 flow [2023-11-19 08:05:11,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 265.7142857142857) internal successors, (1860), 7 states have internal predecessors, (1860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:11,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:11,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:11,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-19 08:05:11,518 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 08:05:11,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:11,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1677526968, now seen corresponding path program 3 times [2023-11-19 08:05:11,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:11,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441458935] [2023-11-19 08:05:11,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:11,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:11,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:12,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:12,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:12,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441458935] [2023-11-19 08:05:12,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441458935] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:12,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:12,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 08:05:12,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949644082] [2023-11-19 08:05:12,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:12,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 08:05:12,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:12,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 08:05:12,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-19 08:05:13,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 691 [2023-11-19 08:05:13,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 75 transitions, 350 flow. Second operand has 7 states, 7 states have (on average 264.7142857142857) internal successors, (1853), 7 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:13,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:13,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 691 [2023-11-19 08:05:13,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:13,782 INFO L124 PetriNetUnfolderBase]: 562/1131 cut-off events. [2023-11-19 08:05:13,783 INFO L125 PetriNetUnfolderBase]: For 487/487 co-relation queries the response was YES. [2023-11-19 08:05:13,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2793 conditions, 1131 events. 562/1131 cut-off events. For 487/487 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 6226 event pairs, 195 based on Foata normal form. 7/1037 useless extension candidates. Maximal degree in co-relation 2776. Up to 567 conditions per place. [2023-11-19 08:05:13,789 INFO L140 encePairwiseOnDemand]: 683/691 looper letters, 90 selfloop transitions, 15 changer transitions 0/111 dead transitions. [2023-11-19 08:05:13,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 111 transitions, 655 flow [2023-11-19 08:05:13,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 08:05:13,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 08:05:13,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1673 transitions. [2023-11-19 08:05:13,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035214664737096 [2023-11-19 08:05:13,797 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1673 transitions. [2023-11-19 08:05:13,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1673 transitions. [2023-11-19 08:05:13,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:13,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1673 transitions. [2023-11-19 08:05:13,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 278.8333333333333) internal successors, (1673), 6 states have internal predecessors, (1673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:13,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 691.0) internal successors, (4837), 7 states have internal predecessors, (4837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:13,812 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 691.0) internal successors, (4837), 7 states have internal predecessors, (4837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:13,812 INFO L175 Difference]: Start difference. First operand has 83 places, 75 transitions, 350 flow. Second operand 6 states and 1673 transitions. [2023-11-19 08:05:13,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 111 transitions, 655 flow [2023-11-19 08:05:13,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 111 transitions, 635 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-11-19 08:05:13,818 INFO L231 Difference]: Finished difference. Result has 85 places, 77 transitions, 387 flow [2023-11-19 08:05:13,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=387, PETRI_PLACES=85, PETRI_TRANSITIONS=77} [2023-11-19 08:05:13,819 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -21 predicate places. [2023-11-19 08:05:13,819 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 77 transitions, 387 flow [2023-11-19 08:05:13,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 264.7142857142857) internal successors, (1853), 7 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:13,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:13,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:13,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-19 08:05:13,821 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 08:05:13,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:13,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1681526309, now seen corresponding path program 1 times [2023-11-19 08:05:13,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:13,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669415937] [2023-11-19 08:05:13,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:13,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:13,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:14,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:14,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:14,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669415937] [2023-11-19 08:05:14,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669415937] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:14,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:14,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:05:14,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566423749] [2023-11-19 08:05:14,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:14,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 08:05:14,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:14,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 08:05:14,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 08:05:14,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 691 [2023-11-19 08:05:14,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 77 transitions, 387 flow. Second operand has 4 states, 4 states have (on average 281.75) internal successors, (1127), 4 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:14,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:14,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 691 [2023-11-19 08:05:14,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:14,462 INFO L124 PetriNetUnfolderBase]: 455/926 cut-off events. [2023-11-19 08:05:14,462 INFO L125 PetriNetUnfolderBase]: For 589/589 co-relation queries the response was YES. [2023-11-19 08:05:14,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2373 conditions, 926 events. 455/926 cut-off events. For 589/589 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 4617 event pairs, 313 based on Foata normal form. 8/842 useless extension candidates. Maximal degree in co-relation 2355. Up to 585 conditions per place. [2023-11-19 08:05:14,466 INFO L140 encePairwiseOnDemand]: 686/691 looper letters, 73 selfloop transitions, 3 changer transitions 0/86 dead transitions. [2023-11-19 08:05:14,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 86 transitions, 561 flow [2023-11-19 08:05:14,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 08:05:14,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 08:05:14,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1179 transitions. [2023-11-19 08:05:14,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42655571635311146 [2023-11-19 08:05:14,472 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1179 transitions. [2023-11-19 08:05:14,472 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1179 transitions. [2023-11-19 08:05:14,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:14,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1179 transitions. [2023-11-19 08:05:14,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 294.75) internal successors, (1179), 4 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:14,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 691.0) internal successors, (3455), 5 states have internal predecessors, (3455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:14,483 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 691.0) internal successors, (3455), 5 states have internal predecessors, (3455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:14,484 INFO L175 Difference]: Start difference. First operand has 85 places, 77 transitions, 387 flow. Second operand 4 states and 1179 transitions. [2023-11-19 08:05:14,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 86 transitions, 561 flow [2023-11-19 08:05:14,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 86 transitions, 547 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-11-19 08:05:14,490 INFO L231 Difference]: Finished difference. Result has 88 places, 76 transitions, 374 flow [2023-11-19 08:05:14,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=374, PETRI_PLACES=88, PETRI_TRANSITIONS=76} [2023-11-19 08:05:14,491 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -18 predicate places. [2023-11-19 08:05:14,491 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 76 transitions, 374 flow [2023-11-19 08:05:14,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 281.75) internal successors, (1127), 4 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:14,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:14,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:14,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-19 08:05:14,492 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 08:05:14,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:14,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1681526310, now seen corresponding path program 1 times [2023-11-19 08:05:14,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:14,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127992500] [2023-11-19 08:05:14,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:14,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:14,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:14,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:14,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:14,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127992500] [2023-11-19 08:05:14,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127992500] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:05:14,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:05:14,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:05:14,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186935943] [2023-11-19 08:05:14,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:05:14,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:05:14,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:14,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:05:14,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:05:14,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 691 [2023-11-19 08:05:14,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 76 transitions, 374 flow. Second operand has 3 states, 3 states have (on average 281.6666666666667) internal successors, (845), 3 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:14,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:14,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 691 [2023-11-19 08:05:14,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:05:14,916 INFO L124 PetriNetUnfolderBase]: 431/880 cut-off events. [2023-11-19 08:05:14,917 INFO L125 PetriNetUnfolderBase]: For 556/556 co-relation queries the response was YES. [2023-11-19 08:05:14,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2272 conditions, 880 events. 431/880 cut-off events. For 556/556 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 4326 event pairs, 356 based on Foata normal form. 16/823 useless extension candidates. Maximal degree in co-relation 2253. Up to 808 conditions per place. [2023-11-19 08:05:14,923 INFO L140 encePairwiseOnDemand]: 687/691 looper letters, 61 selfloop transitions, 3 changer transitions 0/74 dead transitions. [2023-11-19 08:05:14,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 74 transitions, 498 flow [2023-11-19 08:05:14,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:05:14,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:05:14,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 882 transitions. [2023-11-19 08:05:14,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42547033285094066 [2023-11-19 08:05:14,929 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 882 transitions. [2023-11-19 08:05:14,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 882 transitions. [2023-11-19 08:05:14,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:05:14,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 882 transitions. [2023-11-19 08:05:14,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 294.0) internal successors, (882), 3 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:14,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 691.0) internal successors, (2764), 4 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:14,939 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 691.0) internal successors, (2764), 4 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:14,939 INFO L175 Difference]: Start difference. First operand has 88 places, 76 transitions, 374 flow. Second operand 3 states and 882 transitions. [2023-11-19 08:05:14,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 74 transitions, 498 flow [2023-11-19 08:05:14,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 74 transitions, 494 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:05:14,945 INFO L231 Difference]: Finished difference. Result has 86 places, 74 transitions, 372 flow [2023-11-19 08:05:14,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=691, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=372, PETRI_PLACES=86, PETRI_TRANSITIONS=74} [2023-11-19 08:05:14,946 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, -20 predicate places. [2023-11-19 08:05:14,946 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 74 transitions, 372 flow [2023-11-19 08:05:14,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 281.6666666666667) internal successors, (845), 3 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:14,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:05:14,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:05:14,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-19 08:05:14,948 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 101 more)] === [2023-11-19 08:05:14,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:05:14,948 INFO L85 PathProgramCache]: Analyzing trace with hash -587706807, now seen corresponding path program 1 times [2023-11-19 08:05:14,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:05:14,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75666895] [2023-11-19 08:05:14,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:14,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:05:14,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:16,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:16,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:05:16,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75666895] [2023-11-19 08:05:16,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75666895] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:05:16,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688064483] [2023-11-19 08:05:16,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:05:16,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:05:16,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a22c2b-e2e6-468e-986b-0460895912d7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:05:16,131 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a22c2b-e2e6-468e-986b-0460895912d7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:05:16,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64a22c2b-e2e6-468e-986b-0460895912d7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:05:16,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:05:16,301 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-19 08:05:16,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:05:16,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:05:16,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-19 08:05:16,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:05:16,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-19 08:05:16,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:05:16,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2023-11-19 08:05:16,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:05:16,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:05:16,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:05:16,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 1 [2023-11-19 08:05:16,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:05:16,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:05:16,496 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-19 08:05:16,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 14 [2023-11-19 08:05:16,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:05:16,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2023-11-19 08:05:16,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:05:16,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:05:16,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-19 08:05:16,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:05:16,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:05:16,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:05:16,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 1 [2023-11-19 08:05:16,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2023-11-19 08:05:16,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2023-11-19 08:05:17,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 37 [2023-11-19 08:05:17,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 08:05:17,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 50 [2023-11-19 08:05:17,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:17,208 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:05:17,254 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_~#queue~0.offset| 3204))) (and (forall ((v_ArrVal_341 (Array Int Int))) (<= (+ (* (select (select (store |c_#memory_int| |c_~#stored_elements~0.base| v_ArrVal_341) |c_~#queue~0.base|) .cse0) 4) |c_~#queue~0.offset| 4) (select |c_#length| |c_~#queue~0.base|))) (forall ((v_ArrVal_341 (Array Int Int))) (<= 0 (+ (* (select (select (store |c_#memory_int| |c_~#stored_elements~0.base| v_ArrVal_341) |c_~#queue~0.base|) .cse0) 4) |c_~#queue~0.offset|))))) is different from false [2023-11-19 08:05:17,271 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (store (select |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base|) (+ 3204 |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|) (+ |c_t1Thread1of1ForFork0_enqueue_#t~mem40#1| 1)))) (.cse1 (+ |c_~#queue~0.offset| 3204))) (and (forall ((v_ArrVal_341 (Array Int Int))) (<= 0 (+ |c_~#queue~0.offset| (* (select (select (store .cse0 |c_~#stored_elements~0.base| v_ArrVal_341) |c_~#queue~0.base|) .cse1) 4)))) (forall ((v_ArrVal_341 (Array Int Int))) (<= (+ |c_~#queue~0.offset| (* (select (select (store .cse0 |c_~#stored_elements~0.base| v_ArrVal_341) |c_~#queue~0.base|) .cse1) 4) 4) (select |c_#length| |c_~#queue~0.base|))))) is different from false [2023-11-19 08:05:17,314 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (let ((.cse2 (select |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base|)) (.cse3 (+ 3204 |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|))) (store .cse2 .cse3 (+ (select .cse2 .cse3) 1))))) (.cse1 (+ |c_~#queue~0.offset| 3204))) (and (forall ((v_ArrVal_341 (Array Int Int))) (<= 0 (+ (* (select (select (store .cse0 |c_~#stored_elements~0.base| v_ArrVal_341) |c_~#queue~0.base|) .cse1) 4) |c_~#queue~0.offset|))) (forall ((v_ArrVal_341 (Array Int Int))) (<= (+ (* (select (select (store .cse0 |c_~#stored_elements~0.base| v_ArrVal_341) |c_~#queue~0.base|) .cse1) 4) |c_~#queue~0.offset| 4) (select |c_#length| |c_~#queue~0.base|))))) is different from false [2023-11-19 08:05:17,345 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base|)) (.cse2 (+ 3204 |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|))) (let ((.cse1 (+ 3208 |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|)) (.cse3 (+ (select .cse0 .cse2) 1)) (.cse4 (+ |c_~#queue~0.offset| 3204))) (and (forall ((v_ArrVal_341 (Array Int Int)) (|v_t1Thread1of1ForFork0_enqueue_#t~post38#1_110| Int)) (<= 0 (+ (* (select (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (store (store .cse0 .cse1 (+ |v_t1Thread1of1ForFork0_enqueue_#t~post38#1_110| 1)) .cse2 .cse3)) |c_~#stored_elements~0.base| v_ArrVal_341) |c_~#queue~0.base|) .cse4) 4) |c_~#queue~0.offset|))) (forall ((v_ArrVal_341 (Array Int Int)) (|v_t1Thread1of1ForFork0_enqueue_#t~post38#1_110| Int)) (<= (+ (* (select (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (store (store .cse0 .cse1 (+ |v_t1Thread1of1ForFork0_enqueue_#t~post38#1_110| 1)) .cse2 .cse3)) |c_~#stored_elements~0.base| v_ArrVal_341) |c_~#queue~0.base|) .cse4) 4) |c_~#queue~0.offset| 4) (select |c_#length| |c_~#queue~0.base|)))))) is different from false [2023-11-19 08:05:17,384 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (+ 3208 |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|)) (.cse2 (+ 3204 |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|)) (.cse3 (select |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base|)) (.cse4 (+ (* |c_t1Thread1of1ForFork0_enqueue_#t~mem36#1| 4) |c_t1Thread1of1ForFork0_enqueue_~q#1.offset|)) (.cse5 (+ |c_~#queue~0.offset| 3204))) (and (forall ((v_ArrVal_341 (Array Int Int)) (v_ArrVal_337 Int) (|v_t1Thread1of1ForFork0_enqueue_#t~post38#1_110| Int)) (<= 0 (+ (* (select (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (let ((.cse0 (store .cse3 .cse4 v_ArrVal_337))) (store (store .cse0 .cse1 (+ |v_t1Thread1of1ForFork0_enqueue_#t~post38#1_110| 1)) .cse2 (+ (select .cse0 .cse2) 1)))) |c_~#stored_elements~0.base| v_ArrVal_341) |c_~#queue~0.base|) .cse5) 4) |c_~#queue~0.offset|))) (forall ((v_ArrVal_341 (Array Int Int)) (v_ArrVal_337 Int) (|v_t1Thread1of1ForFork0_enqueue_#t~post38#1_110| Int)) (<= (+ (* (select (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork0_enqueue_~q#1.base| (let ((.cse6 (store .cse3 .cse4 v_ArrVal_337))) (store (store .cse6 .cse1 (+ |v_t1Thread1of1ForFork0_enqueue_#t~post38#1_110| 1)) .cse2 (+ (select .cse6 .cse2) 1)))) |c_~#stored_elements~0.base| v_ArrVal_341) |c_~#queue~0.base|) .cse5) 4) |c_~#queue~0.offset| 4) (select |c_#length| |c_~#queue~0.base|))))) is different from false [2023-11-19 08:05:17,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:05:17,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688064483] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:05:17,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 08:05:17,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 22 [2023-11-19 08:05:17,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528412829] [2023-11-19 08:05:17,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 08:05:17,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-19 08:05:17,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:05:17,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-19 08:05:17,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=249, Unknown=5, NotChecked=190, Total=552 [2023-11-19 08:05:18,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 691 [2023-11-19 08:05:18,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 74 transitions, 372 flow. Second operand has 24 states, 24 states have (on average 189.625) internal successors, (4551), 24 states have internal predecessors, (4551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:05:18,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:05:18,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 691 [2023-11-19 08:05:18,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand