./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/queue.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa4be992-9162-45b9-a9d4-b8c430c6bd8a/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa4be992-9162-45b9-a9d4-b8c430c6bd8a/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa4be992-9162-45b9-a9d4-b8c430c6bd8a/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa4be992-9162-45b9-a9d4-b8c430c6bd8a/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/queue.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa4be992-9162-45b9-a9d4-b8c430c6bd8a/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa4be992-9162-45b9-a9d4-b8c430c6bd8a/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4d771c5dc4ab027f123135a7de4324b9be0c6bae288f44d0eaffc15d1836bd60 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:04:29,147 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:04:29,266 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa4be992-9162-45b9-a9d4-b8c430c6bd8a/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-12 02:04:29,273 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:04:29,274 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:04:29,313 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:04:29,314 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:04:29,314 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:04:29,315 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:04:29,320 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:04:29,321 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:04:29,322 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:04:29,322 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:04:29,324 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:04:29,325 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:04:29,325 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:04:29,325 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:04:29,326 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:04:29,326 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-12 02:04:29,327 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-12 02:04:29,327 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-12 02:04:29,328 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:04:29,328 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-12 02:04:29,328 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-12 02:04:29,329 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:04:29,329 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:04:29,330 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:04:29,330 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:04:29,331 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:04:29,331 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:04:29,333 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:04:29,333 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:04:29,333 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:04:29,333 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:04:29,334 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:04:29,334 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:04:29,334 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:04:29,334 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:04:29,335 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_aa4be992-9162-45b9-a9d4-b8c430c6bd8a/bin/uautomizer-verify-uTZkv6EMXl/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa4be992-9162-45b9-a9d4-b8c430c6bd8a/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d771c5dc4ab027f123135a7de4324b9be0c6bae288f44d0eaffc15d1836bd60 [2023-11-12 02:04:29,667 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:04:29,699 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:04:29,702 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:04:29,720 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:04:29,721 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:04:29,723 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa4be992-9162-45b9-a9d4-b8c430c6bd8a/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/pthread/queue.i [2023-11-12 02:04:32,759 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:04:33,035 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:04:33,036 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa4be992-9162-45b9-a9d4-b8c430c6bd8a/sv-benchmarks/c/pthread/queue.i [2023-11-12 02:04:33,055 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa4be992-9162-45b9-a9d4-b8c430c6bd8a/bin/uautomizer-verify-uTZkv6EMXl/data/ba48a7cf3/c42cb4279ea64fcfb78870ebeead7725/FLAG7e2f5eb05 [2023-11-12 02:04:33,071 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa4be992-9162-45b9-a9d4-b8c430c6bd8a/bin/uautomizer-verify-uTZkv6EMXl/data/ba48a7cf3/c42cb4279ea64fcfb78870ebeead7725 [2023-11-12 02:04:33,074 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:04:33,075 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:04:33,077 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:04:33,077 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:04:33,083 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:04:33,084 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:04:33" (1/1) ... [2023-11-12 02:04:33,085 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52db4c28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:33, skipping insertion in model container [2023-11-12 02:04:33,086 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:04:33" (1/1) ... [2023-11-12 02:04:33,135 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:04:33,738 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:04:33,757 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:04:33,845 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:04:33,947 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:04:33,948 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:33 WrapperNode [2023-11-12 02:04:33,948 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:04:33,949 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:04:33,949 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:04:33,950 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:04:33,958 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:33" (1/1) ... [2023-11-12 02:04:33,993 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:33" (1/1) ... [2023-11-12 02:04:34,056 INFO L138 Inliner]: procedures = 274, calls = 71, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 260 [2023-11-12 02:04:34,058 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:04:34,058 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:04:34,059 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:04:34,059 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:04:34,069 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:33" (1/1) ... [2023-11-12 02:04:34,070 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:33" (1/1) ... [2023-11-12 02:04:34,086 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:33" (1/1) ... [2023-11-12 02:04:34,098 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:33" (1/1) ... [2023-11-12 02:04:34,124 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:33" (1/1) ... [2023-11-12 02:04:34,128 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:33" (1/1) ... [2023-11-12 02:04:34,131 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:33" (1/1) ... [2023-11-12 02:04:34,136 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:33" (1/1) ... [2023-11-12 02:04:34,144 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:04:34,149 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:04:34,149 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:04:34,150 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:04:34,151 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:33" (1/1) ... [2023-11-12 02:04:34,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:04:34,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa4be992-9162-45b9-a9d4-b8c430c6bd8a/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:04:34,192 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa4be992-9162-45b9-a9d4-b8c430c6bd8a/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:04:34,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aa4be992-9162-45b9-a9d4-b8c430c6bd8a/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:04:34,242 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-12 02:04:34,242 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-12 02:04:34,243 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-12 02:04:34,243 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-12 02:04:34,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 02:04:34,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:04:34,245 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:04:34,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:04:34,245 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-12 02:04:34,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:04:34,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:04:34,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:04:34,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:04:34,247 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-12 02:04:34,409 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:04:34,411 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:04:35,187 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:04:35,213 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:04:35,213 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-12 02:04:35,217 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:04:35 BoogieIcfgContainer [2023-11-12 02:04:35,217 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:04:35,221 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:04:35,221 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:04:35,225 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:04:35,225 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:04:33" (1/3) ... [2023-11-12 02:04:35,226 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6194f1f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:04:35, skipping insertion in model container [2023-11-12 02:04:35,227 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:04:33" (2/3) ... [2023-11-12 02:04:35,229 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6194f1f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:04:35, skipping insertion in model container [2023-11-12 02:04:35,229 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:04:35" (3/3) ... [2023-11-12 02:04:35,234 INFO L112 eAbstractionObserver]: Analyzing ICFG queue.i [2023-11-12 02:04:35,255 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:04:35,255 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 80 error locations. [2023-11-12 02:04:35,255 INFO L521 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-12 02:04:35,461 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-12 02:04:35,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 362 places, 373 transitions, 760 flow [2023-11-12 02:04:35,725 INFO L124 PetriNetUnfolderBase]: 18/371 cut-off events. [2023-11-12 02:04:35,725 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:04:35,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 380 conditions, 371 events. 18/371 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 825 event pairs, 0 based on Foata normal form. 0/273 useless extension candidates. Maximal degree in co-relation 267. Up to 2 conditions per place. [2023-11-12 02:04:35,742 INFO L82 GeneralOperation]: Start removeDead. Operand has 362 places, 373 transitions, 760 flow [2023-11-12 02:04:35,761 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 355 places, 366 transitions, 744 flow [2023-11-12 02:04:35,765 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-12 02:04:35,779 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 355 places, 366 transitions, 744 flow [2023-11-12 02:04:35,784 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 355 places, 366 transitions, 744 flow [2023-11-12 02:04:35,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 355 places, 366 transitions, 744 flow [2023-11-12 02:04:35,943 INFO L124 PetriNetUnfolderBase]: 18/366 cut-off events. [2023-11-12 02:04:35,943 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-12 02:04:35,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 375 conditions, 366 events. 18/366 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 803 event pairs, 0 based on Foata normal form. 0/269 useless extension candidates. Maximal degree in co-relation 267. Up to 2 conditions per place. [2023-11-12 02:04:35,972 INFO L119 LiptonReduction]: Number of co-enabled transitions 33180 [2023-11-12 02:04:56,660 INFO L134 LiptonReduction]: Checked pairs total: 113829 [2023-11-12 02:04:56,660 INFO L136 LiptonReduction]: Total number of compositions: 493 [2023-11-12 02:04:56,681 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:04:56,689 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;@5b7a1057, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:04:56,689 INFO L358 AbstractCegarLoop]: Starting to check reachability of 142 error locations. [2023-11-12 02:04:56,691 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-12 02:04:56,692 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-11-12 02:04:56,692 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-12 02:04:56,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:04:56,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-12 02:04:56,693 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-12 02:04:56,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:04:56,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1588, now seen corresponding path program 1 times [2023-11-12 02:04:56,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:04:56,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039892244] [2023-11-12 02:04:56,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:56,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:04:56,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:04:56,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:04:56,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:04:56,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039892244] [2023-11-12 02:04:56,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039892244] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:04:56,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:04:56,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-12 02:04:56,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778851925] [2023-11-12 02:04:56,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:04:56,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:04:56,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:04:56,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:04:56,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:04:56,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 357 out of 866 [2023-11-12 02:04:56,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 144 transitions, 300 flow. Second operand has 2 states, 2 states have (on average 357.5) internal successors, (715), 2 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:56,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:04:56,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 357 of 866 [2023-11-12 02:04:56,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:04:58,685 INFO L124 PetriNetUnfolderBase]: 7872/12479 cut-off events. [2023-11-12 02:04:58,686 INFO L125 PetriNetUnfolderBase]: For 73/73 co-relation queries the response was YES. [2023-11-12 02:04:58,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24470 conditions, 12479 events. 7872/12479 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 73134 event pairs, 6916 based on Foata normal form. 0/6380 useless extension candidates. Maximal degree in co-relation 24056. Up to 11876 conditions per place. [2023-11-12 02:04:58,800 INFO L140 encePairwiseOnDemand]: 817/866 looper letters, 85 selfloop transitions, 0 changer transitions 0/93 dead transitions. [2023-11-12 02:04:58,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 93 transitions, 368 flow [2023-11-12 02:04:58,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:04:58,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-12 02:04:58,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 848 transitions. [2023-11-12 02:04:58,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4896073903002309 [2023-11-12 02:04:58,828 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 848 transitions. [2023-11-12 02:04:58,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 848 transitions. [2023-11-12 02:04:58,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:04:58,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 848 transitions. [2023-11-12 02:04:58,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 424.0) internal successors, (848), 2 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:58,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 866.0) internal successors, (2598), 3 states have internal predecessors, (2598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:58,860 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 866.0) internal successors, (2598), 3 states have internal predecessors, (2598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:58,862 INFO L175 Difference]: Start difference. First operand has 140 places, 144 transitions, 300 flow. Second operand 2 states and 848 transitions. [2023-11-12 02:04:58,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 93 transitions, 368 flow [2023-11-12 02:04:58,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 93 transitions, 360 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-12 02:04:58,876 INFO L231 Difference]: Finished difference. Result has 89 places, 93 transitions, 190 flow [2023-11-12 02:04:58,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=866, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=190, PETRI_PLACES=89, PETRI_TRANSITIONS=93} [2023-11-12 02:04:58,884 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -51 predicate places. [2023-11-12 02:04:58,884 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 93 transitions, 190 flow [2023-11-12 02:04:58,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 357.5) internal successors, (715), 2 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:58,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:04:58,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-12 02:04:58,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:04:58,887 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-12 02:04:58,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:04:58,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1567565, now seen corresponding path program 1 times [2023-11-12 02:04:58,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:04:58,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330105748] [2023-11-12 02:04:58,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:04:58,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:04:59,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:04:59,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:04:59,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:04:59,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330105748] [2023-11-12 02:04:59,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330105748] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:04:59,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:04:59,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:04:59,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944848324] [2023-11-12 02:04:59,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:04:59,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:04:59,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:04:59,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:04:59,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:04:59,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 354 out of 866 [2023-11-12 02:04:59,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 93 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 355.0) internal successors, (1065), 3 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:04:59,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:04:59,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 354 of 866 [2023-11-12 02:04:59,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:05:01,153 INFO L124 PetriNetUnfolderBase]: 7053/11188 cut-off events. [2023-11-12 02:05:01,153 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-12 02:05:01,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21852 conditions, 11188 events. 7053/11188 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 64466 event pairs, 6153 based on Foata normal form. 0/5975 useless extension candidates. Maximal degree in co-relation 21849. Up to 10620 conditions per place. [2023-11-12 02:05:01,237 INFO L140 encePairwiseOnDemand]: 861/866 looper letters, 80 selfloop transitions, 1 changer transitions 0/89 dead transitions. [2023-11-12 02:05:01,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 89 transitions, 344 flow [2023-11-12 02:05:01,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:05:01,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:05:01,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1147 transitions. [2023-11-12 02:05:01,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4414934565050038 [2023-11-12 02:05:01,245 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1147 transitions. [2023-11-12 02:05:01,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1147 transitions. [2023-11-12 02:05:01,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:05:01,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1147 transitions. [2023-11-12 02:05:01,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 382.3333333333333) internal successors, (1147), 3 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:01,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 866.0) internal successors, (3464), 4 states have internal predecessors, (3464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:01,263 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 866.0) internal successors, (3464), 4 states have internal predecessors, (3464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:01,264 INFO L175 Difference]: Start difference. First operand has 89 places, 93 transitions, 190 flow. Second operand 3 states and 1147 transitions. [2023-11-12 02:05:01,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 89 transitions, 344 flow [2023-11-12 02:05:01,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 89 transitions, 344 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:05:01,270 INFO L231 Difference]: Finished difference. Result has 87 places, 89 transitions, 184 flow [2023-11-12 02:05:01,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=866, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=87, PETRI_TRANSITIONS=89} [2023-11-12 02:05:01,275 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -53 predicate places. [2023-11-12 02:05:01,275 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 89 transitions, 184 flow [2023-11-12 02:05:01,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 355.0) internal successors, (1065), 3 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:01,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:05:01,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-12 02:05:01,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:05:01,280 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-12 02:05:01,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:05:01,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1567563, now seen corresponding path program 1 times [2023-11-12 02:05:01,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:05:01,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580459648] [2023-11-12 02:05:01,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:01,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:05:01,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:05:01,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:01,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:05:01,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580459648] [2023-11-12 02:05:01,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580459648] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:05:01,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:05:01,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:05:01,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292973248] [2023-11-12 02:05:01,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:05:01,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:05:01,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:05:01,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:05:01,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:05:01,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 354 out of 866 [2023-11-12 02:05:01,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 89 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 355.0) internal successors, (1065), 3 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:01,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:05:01,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 354 of 866 [2023-11-12 02:05:01,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:05:02,848 INFO L124 PetriNetUnfolderBase]: 6276/9963 cut-off events. [2023-11-12 02:05:02,848 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-12 02:05:02,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19437 conditions, 9963 events. 6276/9963 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 56354 event pairs, 5432 based on Foata normal form. 0/5576 useless extension candidates. Maximal degree in co-relation 19433. Up to 9430 conditions per place. [2023-11-12 02:05:02,912 INFO L140 encePairwiseOnDemand]: 860/866 looper letters, 75 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2023-11-12 02:05:02,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 85 transitions, 330 flow [2023-11-12 02:05:02,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:05:02,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:05:02,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1143 transitions. [2023-11-12 02:05:02,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4399538106235566 [2023-11-12 02:05:02,918 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1143 transitions. [2023-11-12 02:05:02,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1143 transitions. [2023-11-12 02:05:02,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:05:02,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1143 transitions. [2023-11-12 02:05:02,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 381.0) internal successors, (1143), 3 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:02,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 866.0) internal successors, (3464), 4 states have internal predecessors, (3464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:02,933 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 866.0) internal successors, (3464), 4 states have internal predecessors, (3464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:02,934 INFO L175 Difference]: Start difference. First operand has 87 places, 89 transitions, 184 flow. Second operand 3 states and 1143 transitions. [2023-11-12 02:05:02,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 85 transitions, 330 flow [2023-11-12 02:05:02,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 85 transitions, 329 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-12 02:05:02,937 INFO L231 Difference]: Finished difference. Result has 84 places, 85 transitions, 179 flow [2023-11-12 02:05:02,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=866, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=179, PETRI_PLACES=84, PETRI_TRANSITIONS=85} [2023-11-12 02:05:02,938 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -56 predicate places. [2023-11-12 02:05:02,939 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 85 transitions, 179 flow [2023-11-12 02:05:02,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 355.0) internal successors, (1065), 3 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:02,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:05:02,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-12 02:05:02,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:05:02,940 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-12 02:05:02,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:05:02,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1567476, now seen corresponding path program 1 times [2023-11-12 02:05:02,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:05:02,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466838611] [2023-11-12 02:05:02,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:02,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:05:02,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:05:02,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:02,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:05:02,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466838611] [2023-11-12 02:05:02,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466838611] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:05:02,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:05:02,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:05:02,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859532203] [2023-11-12 02:05:02,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:05:02,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:05:02,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:05:02,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:05:02,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:05:03,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 347 out of 866 [2023-11-12 02:05:03,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 85 transitions, 179 flow. Second operand has 3 states, 3 states have (on average 348.0) internal successors, (1044), 3 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:03,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:05:03,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 347 of 866 [2023-11-12 02:05:03,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:05:04,394 INFO L124 PetriNetUnfolderBase]: 6213/9838 cut-off events. [2023-11-12 02:05:04,394 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-12 02:05:04,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19194 conditions, 9838 events. 6213/9838 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 55404 event pairs, 5376 based on Foata normal form. 0/5533 useless extension candidates. Maximal degree in co-relation 19190. Up to 9310 conditions per place. [2023-11-12 02:05:04,471 INFO L140 encePairwiseOnDemand]: 862/866 looper letters, 73 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-11-12 02:05:04,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 83 transitions, 325 flow [2023-11-12 02:05:04,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:05:04,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:05:04,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1118 transitions. [2023-11-12 02:05:04,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43033102386451116 [2023-11-12 02:05:04,478 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1118 transitions. [2023-11-12 02:05:04,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1118 transitions. [2023-11-12 02:05:04,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:05:04,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1118 transitions. [2023-11-12 02:05:04,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 372.6666666666667) internal successors, (1118), 3 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:04,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 866.0) internal successors, (3464), 4 states have internal predecessors, (3464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:04,496 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 866.0) internal successors, (3464), 4 states have internal predecessors, (3464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:04,497 INFO L175 Difference]: Start difference. First operand has 84 places, 85 transitions, 179 flow. Second operand 3 states and 1118 transitions. [2023-11-12 02:05:04,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 83 transitions, 325 flow [2023-11-12 02:05:04,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 83 transitions, 321 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:05:04,501 INFO L231 Difference]: Finished difference. Result has 82 places, 83 transitions, 175 flow [2023-11-12 02:05:04,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=866, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=175, PETRI_PLACES=82, PETRI_TRANSITIONS=83} [2023-11-12 02:05:04,504 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -58 predicate places. [2023-11-12 02:05:04,504 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 83 transitions, 175 flow [2023-11-12 02:05:04,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 348.0) internal successors, (1044), 3 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:04,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:05:04,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-12 02:05:04,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:05:04,506 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-12 02:05:04,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:05:04,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1567477, now seen corresponding path program 1 times [2023-11-12 02:05:04,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:05:04,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852399683] [2023-11-12 02:05:04,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:04,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:05:04,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:05:04,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:04,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:05:04,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852399683] [2023-11-12 02:05:04,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852399683] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:05:04,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:05:04,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-12 02:05:04,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142488296] [2023-11-12 02:05:04,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:05:04,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:05:04,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:05:04,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:05:04,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:05:04,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 351 out of 866 [2023-11-12 02:05:04,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 83 transitions, 175 flow. Second operand has 3 states, 3 states have (on average 352.0) internal successors, (1056), 3 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:04,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:05:04,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 351 of 866 [2023-11-12 02:05:04,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:05:05,861 INFO L124 PetriNetUnfolderBase]: 6150/9713 cut-off events. [2023-11-12 02:05:05,861 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-12 02:05:05,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18949 conditions, 9713 events. 6150/9713 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 54373 event pairs, 5320 based on Foata normal form. 0/5490 useless extension candidates. Maximal degree in co-relation 18945. Up to 9190 conditions per place. [2023-11-12 02:05:05,945 INFO L140 encePairwiseOnDemand]: 862/866 looper letters, 71 selfloop transitions, 2 changer transitions 0/81 dead transitions. [2023-11-12 02:05:05,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 81 transitions, 317 flow [2023-11-12 02:05:05,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:05:05,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:05:05,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1128 transitions. [2023-11-12 02:05:05,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4341801385681293 [2023-11-12 02:05:05,951 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1128 transitions. [2023-11-12 02:05:05,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1128 transitions. [2023-11-12 02:05:05,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:05:05,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1128 transitions. [2023-11-12 02:05:05,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 376.0) internal successors, (1128), 3 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:05,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 866.0) internal successors, (3464), 4 states have internal predecessors, (3464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:05,968 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 866.0) internal successors, (3464), 4 states have internal predecessors, (3464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:05,968 INFO L175 Difference]: Start difference. First operand has 82 places, 83 transitions, 175 flow. Second operand 3 states and 1128 transitions. [2023-11-12 02:05:05,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 81 transitions, 317 flow [2023-11-12 02:05:05,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 81 transitions, 313 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:05:05,972 INFO L231 Difference]: Finished difference. Result has 80 places, 81 transitions, 171 flow [2023-11-12 02:05:05,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=866, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=171, PETRI_PLACES=80, PETRI_TRANSITIONS=81} [2023-11-12 02:05:05,976 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -60 predicate places. [2023-11-12 02:05:05,976 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 81 transitions, 171 flow [2023-11-12 02:05:05,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 352.0) internal successors, (1056), 3 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:05,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:05:05,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-12 02:05:05,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:05:05,978 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-12 02:05:05,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:05:05,978 INFO L85 PathProgramCache]: Analyzing trace with hash 48594419, now seen corresponding path program 1 times [2023-11-12 02:05:05,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:05:05,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561497286] [2023-11-12 02:05:05,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:05,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:05:06,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:05:06,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:06,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:05:06,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561497286] [2023-11-12 02:05:06,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561497286] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:05:06,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:05:06,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:05:06,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599826504] [2023-11-12 02:05:06,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:05:06,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:05:06,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:05:06,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:05:06,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:05:07,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 866 [2023-11-12 02:05:07,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 81 transitions, 171 flow. Second operand has 4 states, 4 states have (on average 331.0) internal successors, (1324), 4 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:07,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:05:07,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 866 [2023-11-12 02:05:07,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:05:08,126 INFO L124 PetriNetUnfolderBase]: 6459/10113 cut-off events. [2023-11-12 02:05:08,127 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-12 02:05:08,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19827 conditions, 10113 events. 6459/10113 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 55768 event pairs, 5404 based on Foata normal form. 0/5564 useless extension candidates. Maximal degree in co-relation 19823. Up to 9664 conditions per place. [2023-11-12 02:05:08,190 INFO L140 encePairwiseOnDemand]: 860/866 looper letters, 75 selfloop transitions, 6 changer transitions 0/87 dead transitions. [2023-11-12 02:05:08,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 87 transitions, 345 flow [2023-11-12 02:05:08,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:05:08,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:05:08,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1402 transitions. [2023-11-12 02:05:08,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40473441108545033 [2023-11-12 02:05:08,196 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1402 transitions. [2023-11-12 02:05:08,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1402 transitions. [2023-11-12 02:05:08,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:05:08,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1402 transitions. [2023-11-12 02:05:08,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 350.5) internal successors, (1402), 4 states have internal predecessors, (1402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:08,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 866.0) internal successors, (4330), 5 states have internal predecessors, (4330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:08,214 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 866.0) internal successors, (4330), 5 states have internal predecessors, (4330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:08,214 INFO L175 Difference]: Start difference. First operand has 80 places, 81 transitions, 171 flow. Second operand 4 states and 1402 transitions. [2023-11-12 02:05:08,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 87 transitions, 345 flow [2023-11-12 02:05:08,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 87 transitions, 341 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:05:08,218 INFO L231 Difference]: Finished difference. Result has 83 places, 86 transitions, 206 flow [2023-11-12 02:05:08,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=866, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=206, PETRI_PLACES=83, PETRI_TRANSITIONS=86} [2023-11-12 02:05:08,219 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -57 predicate places. [2023-11-12 02:05:08,219 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 86 transitions, 206 flow [2023-11-12 02:05:08,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 331.0) internal successors, (1324), 4 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:08,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:05:08,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 02:05:08,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 02:05:08,221 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-12 02:05:08,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:05:08,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1506429187, now seen corresponding path program 1 times [2023-11-12 02:05:08,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:05:08,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650969181] [2023-11-12 02:05:08,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:08,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:05:08,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:05:09,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:09,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:05:09,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650969181] [2023-11-12 02:05:09,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650969181] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:05:09,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:05:09,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:05:09,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654438805] [2023-11-12 02:05:09,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:05:09,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:05:09,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:05:09,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:05:09,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:05:11,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 866 [2023-11-12 02:05:11,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 86 transitions, 206 flow. Second operand has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:11,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:05:11,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 866 [2023-11-12 02:05:11,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:05:13,641 INFO L124 PetriNetUnfolderBase]: 6660/10373 cut-off events. [2023-11-12 02:05:13,641 INFO L125 PetriNetUnfolderBase]: For 304/304 co-relation queries the response was YES. [2023-11-12 02:05:13,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20873 conditions, 10373 events. 6660/10373 cut-off events. For 304/304 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 57863 event pairs, 1569 based on Foata normal form. 41/5842 useless extension candidates. Maximal degree in co-relation 20867. Up to 9678 conditions per place. [2023-11-12 02:05:13,701 INFO L140 encePairwiseOnDemand]: 859/866 looper letters, 105 selfloop transitions, 11 changer transitions 0/122 dead transitions. [2023-11-12 02:05:13,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 122 transitions, 518 flow [2023-11-12 02:05:13,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:05:13,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-12 02:05:13,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1442 transitions. [2023-11-12 02:05:13,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41628175519630484 [2023-11-12 02:05:13,708 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1442 transitions. [2023-11-12 02:05:13,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1442 transitions. [2023-11-12 02:05:13,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:05:13,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1442 transitions. [2023-11-12 02:05:13,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 360.5) internal successors, (1442), 4 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:13,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 866.0) internal successors, (4330), 5 states have internal predecessors, (4330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:13,723 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 866.0) internal successors, (4330), 5 states have internal predecessors, (4330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:13,724 INFO L175 Difference]: Start difference. First operand has 83 places, 86 transitions, 206 flow. Second operand 4 states and 1442 transitions. [2023-11-12 02:05:13,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 122 transitions, 518 flow [2023-11-12 02:05:13,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 122 transitions, 518 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-12 02:05:13,729 INFO L231 Difference]: Finished difference. Result has 88 places, 93 transitions, 273 flow [2023-11-12 02:05:13,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=866, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=273, PETRI_PLACES=88, PETRI_TRANSITIONS=93} [2023-11-12 02:05:13,730 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -52 predicate places. [2023-11-12 02:05:13,730 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 93 transitions, 273 flow [2023-11-12 02:05:13,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 333.0) internal successors, (1665), 5 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:13,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:05:13,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 02:05:13,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 02:05:13,732 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-12 02:05:13,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:05:13,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1506377999, now seen corresponding path program 1 times [2023-11-12 02:05:13,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:05:13,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608701658] [2023-11-12 02:05:13,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:13,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:05:13,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:05:13,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:13,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:05:13,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608701658] [2023-11-12 02:05:13,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608701658] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:05:13,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:05:13,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:05:13,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180288636] [2023-11-12 02:05:13,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:05:13,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:05:13,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:05:13,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:05:13,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:05:14,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 866 [2023-11-12 02:05:14,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 93 transitions, 273 flow. Second operand has 4 states, 4 states have (on average 344.25) internal successors, (1377), 4 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:14,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:05:14,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 866 [2023-11-12 02:05:14,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:05:14,832 INFO L124 PetriNetUnfolderBase]: 4651/7507 cut-off events. [2023-11-12 02:05:14,832 INFO L125 PetriNetUnfolderBase]: For 954/1032 co-relation queries the response was YES. [2023-11-12 02:05:14,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15522 conditions, 7507 events. 4651/7507 cut-off events. For 954/1032 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 41596 event pairs, 3818 based on Foata normal form. 26/4698 useless extension candidates. Maximal degree in co-relation 15513. Up to 7093 conditions per place. [2023-11-12 02:05:14,878 INFO L140 encePairwiseOnDemand]: 863/866 looper letters, 80 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2023-11-12 02:05:14,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 92 transitions, 435 flow [2023-11-12 02:05:14,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:05:14,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:05:14,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1102 transitions. [2023-11-12 02:05:14,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4241724403387221 [2023-11-12 02:05:14,885 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1102 transitions. [2023-11-12 02:05:14,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1102 transitions. [2023-11-12 02:05:14,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:05:14,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1102 transitions. [2023-11-12 02:05:14,889 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 367.3333333333333) internal successors, (1102), 3 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:14,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 866.0) internal successors, (3464), 4 states have internal predecessors, (3464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:14,896 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 866.0) internal successors, (3464), 4 states have internal predecessors, (3464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:14,896 INFO L175 Difference]: Start difference. First operand has 88 places, 93 transitions, 273 flow. Second operand 3 states and 1102 transitions. [2023-11-12 02:05:14,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 92 transitions, 435 flow [2023-11-12 02:05:14,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 92 transitions, 427 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-11-12 02:05:14,904 INFO L231 Difference]: Finished difference. Result has 89 places, 92 transitions, 267 flow [2023-11-12 02:05:14,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=866, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=267, PETRI_PLACES=89, PETRI_TRANSITIONS=92} [2023-11-12 02:05:14,905 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -51 predicate places. [2023-11-12 02:05:14,905 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 92 transitions, 267 flow [2023-11-12 02:05:14,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 344.25) internal successors, (1377), 4 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:14,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:05:14,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 02:05:14,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 02:05:14,907 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-12 02:05:14,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:05:14,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1506378000, now seen corresponding path program 1 times [2023-11-12 02:05:14,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:05:14,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507302968] [2023-11-12 02:05:14,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:14,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:05:14,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:05:15,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:15,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:05:15,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507302968] [2023-11-12 02:05:15,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507302968] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:05:15,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:05:15,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:05:15,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891078669] [2023-11-12 02:05:15,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:05:15,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:05:15,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:05:15,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:05:15,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:05:15,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 349 out of 866 [2023-11-12 02:05:15,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 92 transitions, 267 flow. Second operand has 4 states, 4 states have (on average 350.25) internal successors, (1401), 4 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:15,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:05:15,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 349 of 866 [2023-11-12 02:05:15,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:05:15,958 INFO L124 PetriNetUnfolderBase]: 2870/4816 cut-off events. [2023-11-12 02:05:15,958 INFO L125 PetriNetUnfolderBase]: For 415/449 co-relation queries the response was YES. [2023-11-12 02:05:15,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9891 conditions, 4816 events. 2870/4816 cut-off events. For 415/449 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 25877 event pairs, 2298 based on Foata normal form. 17/3473 useless extension candidates. Maximal degree in co-relation 9881. Up to 4536 conditions per place. [2023-11-12 02:05:16,000 INFO L140 encePairwiseOnDemand]: 863/866 looper letters, 79 selfloop transitions, 2 changer transitions 0/91 dead transitions. [2023-11-12 02:05:16,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 91 transitions, 427 flow [2023-11-12 02:05:16,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:05:16,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:05:16,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1119 transitions. [2023-11-12 02:05:16,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43071593533487296 [2023-11-12 02:05:16,006 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1119 transitions. [2023-11-12 02:05:16,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1119 transitions. [2023-11-12 02:05:16,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:05:16,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1119 transitions. [2023-11-12 02:05:16,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 373.0) internal successors, (1119), 3 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:16,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 866.0) internal successors, (3464), 4 states have internal predecessors, (3464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:16,020 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 866.0) internal successors, (3464), 4 states have internal predecessors, (3464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:16,020 INFO L175 Difference]: Start difference. First operand has 89 places, 92 transitions, 267 flow. Second operand 3 states and 1119 transitions. [2023-11-12 02:05:16,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 91 transitions, 427 flow [2023-11-12 02:05:16,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 91 transitions, 423 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:05:16,025 INFO L231 Difference]: Finished difference. Result has 88 places, 91 transitions, 265 flow [2023-11-12 02:05:16,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=866, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=265, PETRI_PLACES=88, PETRI_TRANSITIONS=91} [2023-11-12 02:05:16,026 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -52 predicate places. [2023-11-12 02:05:16,026 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 91 transitions, 265 flow [2023-11-12 02:05:16,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 350.25) internal successors, (1401), 4 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:16,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:05:16,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-12 02:05:16,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 02:05:16,028 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-12 02:05:16,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:05:16,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1506428258, now seen corresponding path program 1 times [2023-11-12 02:05:16,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:05:16,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402677362] [2023-11-12 02:05:16,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:16,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:05:16,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:05:16,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:16,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:05:16,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402677362] [2023-11-12 02:05:16,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402677362] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:05:16,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:05:16,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:05:16,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843449146] [2023-11-12 02:05:16,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:05:16,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:05:16,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:05:16,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:05:16,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:05:16,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 866 [2023-11-12 02:05:16,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 91 transitions, 265 flow. Second operand has 5 states, 5 states have (on average 331.0) internal successors, (1655), 5 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:16,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:05:16,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 866 [2023-11-12 02:05:16,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:05:17,423 INFO L124 PetriNetUnfolderBase]: 2578/4311 cut-off events. [2023-11-12 02:05:17,423 INFO L125 PetriNetUnfolderBase]: For 351/355 co-relation queries the response was YES. [2023-11-12 02:05:17,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8844 conditions, 4311 events. 2578/4311 cut-off events. For 351/355 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 23096 event pairs, 1018 based on Foata normal form. 110/3239 useless extension candidates. Maximal degree in co-relation 8834. Up to 1940 conditions per place. [2023-11-12 02:05:17,453 INFO L140 encePairwiseOnDemand]: 846/866 looper letters, 110 selfloop transitions, 18 changer transitions 0/138 dead transitions. [2023-11-12 02:05:17,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 138 transitions, 625 flow [2023-11-12 02:05:17,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:05:17,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-12 02:05:17,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1771 transitions. [2023-11-12 02:05:17,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090069284064665 [2023-11-12 02:05:17,467 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1771 transitions. [2023-11-12 02:05:17,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1771 transitions. [2023-11-12 02:05:17,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:05:17,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1771 transitions. [2023-11-12 02:05:17,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 354.2) internal successors, (1771), 5 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:17,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 866.0) internal successors, (5196), 6 states have internal predecessors, (5196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:17,487 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 866.0) internal successors, (5196), 6 states have internal predecessors, (5196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:17,487 INFO L175 Difference]: Start difference. First operand has 88 places, 91 transitions, 265 flow. Second operand 5 states and 1771 transitions. [2023-11-12 02:05:17,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 138 transitions, 625 flow [2023-11-12 02:05:17,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 138 transitions, 621 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-12 02:05:17,494 INFO L231 Difference]: Finished difference. Result has 86 places, 85 transitions, 272 flow [2023-11-12 02:05:17,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=866, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=272, PETRI_PLACES=86, PETRI_TRANSITIONS=85} [2023-11-12 02:05:17,497 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -54 predicate places. [2023-11-12 02:05:17,498 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 85 transitions, 272 flow [2023-11-12 02:05:17,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 331.0) internal successors, (1655), 5 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:17,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:05:17,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:05:17,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-12 02:05:17,499 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-12 02:05:17,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:05:17,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1606118042, now seen corresponding path program 1 times [2023-11-12 02:05:17,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:05:17,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377610919] [2023-11-12 02:05:17,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:17,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:05:17,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:05:17,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:05:17,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:05:17,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377610919] [2023-11-12 02:05:17,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377610919] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:05:17,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:05:17,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:05:17,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838525] [2023-11-12 02:05:17,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:05:17,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:05:17,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:05:17,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:05:17,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:05:17,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 352 out of 866 [2023-11-12 02:05:17,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 85 transitions, 272 flow. Second operand has 3 states, 3 states have (on average 354.6666666666667) internal successors, (1064), 3 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:17,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-12 02:05:17,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 352 of 866 [2023-11-12 02:05:17,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-12 02:05:18,073 INFO L124 PetriNetUnfolderBase]: 1762/3029 cut-off events. [2023-11-12 02:05:18,073 INFO L125 PetriNetUnfolderBase]: For 322/322 co-relation queries the response was YES. [2023-11-12 02:05:18,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6682 conditions, 3029 events. 1762/3029 cut-off events. For 322/322 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 13362 event pairs, 911 based on Foata normal form. 0/2366 useless extension candidates. Maximal degree in co-relation 6672. Up to 1824 conditions per place. [2023-11-12 02:05:18,089 INFO L140 encePairwiseOnDemand]: 862/866 looper letters, 96 selfloop transitions, 3 changer transitions 0/107 dead transitions. [2023-11-12 02:05:18,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 107 transitions, 513 flow [2023-11-12 02:05:18,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:05:18,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-12 02:05:18,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1153 transitions. [2023-11-12 02:05:18,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44380292532717475 [2023-11-12 02:05:18,095 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1153 transitions. [2023-11-12 02:05:18,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1153 transitions. [2023-11-12 02:05:18,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-12 02:05:18,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1153 transitions. [2023-11-12 02:05:18,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 384.3333333333333) internal successors, (1153), 3 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:18,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 866.0) internal successors, (3464), 4 states have internal predecessors, (3464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:18,106 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 866.0) internal successors, (3464), 4 states have internal predecessors, (3464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:18,106 INFO L175 Difference]: Start difference. First operand has 86 places, 85 transitions, 272 flow. Second operand 3 states and 1153 transitions. [2023-11-12 02:05:18,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 107 transitions, 513 flow [2023-11-12 02:05:18,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 107 transitions, 444 flow, removed 2 selfloop flow, removed 9 redundant places. [2023-11-12 02:05:18,111 INFO L231 Difference]: Finished difference. Result has 79 places, 79 transitions, 198 flow [2023-11-12 02:05:18,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=866, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=79, PETRI_TRANSITIONS=79} [2023-11-12 02:05:18,112 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -61 predicate places. [2023-11-12 02:05:18,112 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 79 transitions, 198 flow [2023-11-12 02:05:18,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 354.6666666666667) internal successors, (1064), 3 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:05:18,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-12 02:05:18,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:05:18,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-12 02:05:18,113 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-12 02:05:18,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:05:18,114 INFO L85 PathProgramCache]: Analyzing trace with hash -817268332, now seen corresponding path program 1 times [2023-11-12 02:05:18,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:05:18,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129898974] [2023-11-12 02:05:18,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:05:18,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:05:18,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat