./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/queue_longer.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff 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_c220b54e-c329-4b41-9377-393ae961c75e/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c220b54e-c329-4b41-9377-393ae961c75e/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c220b54e-c329-4b41-9377-393ae961c75e/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c220b54e-c329-4b41-9377-393ae961c75e/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/queue_longer.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c220b54e-c329-4b41-9377-393ae961c75e/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c220b54e-c329-4b41-9377-393ae961c75e/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9f874a9872f93f025fac23ebed37f94a1f3b80bd0133ea4d7e298577c4fec427 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:47:58,981 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:47:59,132 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c220b54e-c329-4b41-9377-393ae961c75e/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 07:47:59,140 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:47:59,142 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:47:59,190 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:47:59,191 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:47:59,192 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:47:59,193 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:47:59,199 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:47:59,201 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:47:59,202 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:47:59,202 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:47:59,205 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:47:59,205 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:47:59,206 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:47:59,206 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:47:59,207 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:47:59,207 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 07:47:59,208 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 07:47:59,208 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 07:47:59,209 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:47:59,209 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 07:47:59,210 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:47:59,210 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:47:59,211 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:47:59,212 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:47:59,212 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:47:59,213 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:47:59,213 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:47:59,214 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:47:59,214 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:47:59,215 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:47:59,215 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:47:59,215 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:47:59,215 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:47:59,216 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:47:59,216 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:47:59,216 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_c220b54e-c329-4b41-9377-393ae961c75e/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c220b54e-c329-4b41-9377-393ae961c75e/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9f874a9872f93f025fac23ebed37f94a1f3b80bd0133ea4d7e298577c4fec427 [2023-11-19 07:47:59,505 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:47:59,545 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:47:59,552 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:47:59,554 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:47:59,555 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:47:59,556 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c220b54e-c329-4b41-9377-393ae961c75e/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread/queue_longer.i [2023-11-19 07:48:03,387 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:48:03,890 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:48:03,891 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c220b54e-c329-4b41-9377-393ae961c75e/sv-benchmarks/c/pthread/queue_longer.i [2023-11-19 07:48:03,924 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c220b54e-c329-4b41-9377-393ae961c75e/bin/uautomizer-verify-uCwYo4JHxu/data/d5cdded85/0a85b5d9384a4d19bc43af1562b0fc98/FLAGe699ba711 [2023-11-19 07:48:03,952 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c220b54e-c329-4b41-9377-393ae961c75e/bin/uautomizer-verify-uCwYo4JHxu/data/d5cdded85/0a85b5d9384a4d19bc43af1562b0fc98 [2023-11-19 07:48:03,959 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:48:03,963 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:48:03,967 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:48:03,968 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:48:03,974 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:48:03,975 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:48:03" (1/1) ... [2023-11-19 07:48:03,977 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@333d380c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:03, skipping insertion in model container [2023-11-19 07:48:03,977 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:48:03" (1/1) ... [2023-11-19 07:48:04,081 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:48:04,824 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:48:04,839 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:48:04,912 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:48:05,019 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:48:05,020 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:05 WrapperNode [2023-11-19 07:48:05,020 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:48:05,021 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:48:05,021 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:48:05,021 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:48:05,029 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:05" (1/1) ... [2023-11-19 07:48:05,054 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:05" (1/1) ... [2023-11-19 07:48:05,116 INFO L138 Inliner]: procedures = 274, calls = 63, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 251 [2023-11-19 07:48:05,117 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:48:05,117 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:48:05,118 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:48:05,118 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:48:05,128 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:05" (1/1) ... [2023-11-19 07:48:05,134 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:05" (1/1) ... [2023-11-19 07:48:05,148 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:05" (1/1) ... [2023-11-19 07:48:05,151 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:05" (1/1) ... [2023-11-19 07:48:05,175 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:05" (1/1) ... [2023-11-19 07:48:05,179 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:05" (1/1) ... [2023-11-19 07:48:05,183 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:05" (1/1) ... [2023-11-19 07:48:05,185 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:05" (1/1) ... [2023-11-19 07:48:05,229 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:48:05,230 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:48:05,231 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:48:05,231 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:48:05,232 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:05" (1/1) ... [2023-11-19 07:48:05,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:48:05,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c220b54e-c329-4b41-9377-393ae961c75e/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:05,320 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c220b54e-c329-4b41-9377-393ae961c75e/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:48:05,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c220b54e-c329-4b41-9377-393ae961c75e/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:48:05,365 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-19 07:48:05,366 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-19 07:48:05,367 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-19 07:48:05,368 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-19 07:48:05,368 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:48:05,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:48:05,368 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:48:05,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:48:05,369 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 07:48:05,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:48:05,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:48:05,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:48:05,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:48:05,371 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:48:05,634 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:48:05,638 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:48:06,377 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:48:06,394 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:48:06,394 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 07:48:06,401 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:48:06 BoogieIcfgContainer [2023-11-19 07:48:06,402 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:48:06,405 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:48:06,405 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:48:06,409 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:48:06,409 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:48:03" (1/3) ... [2023-11-19 07:48:06,410 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@672538c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:48:06, skipping insertion in model container [2023-11-19 07:48:06,410 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:05" (2/3) ... [2023-11-19 07:48:06,411 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@672538c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:48:06, skipping insertion in model container [2023-11-19 07:48:06,411 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:48:06" (3/3) ... [2023-11-19 07:48:06,412 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_longer.i [2023-11-19 07:48:06,433 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:48:06,434 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 80 error locations. [2023-11-19 07:48:06,434 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:48:06,668 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 07:48:06,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 354 places, 365 transitions, 744 flow [2023-11-19 07:48:06,971 INFO L124 PetriNetUnfolderBase]: 18/363 cut-off events. [2023-11-19 07:48:06,971 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:48:06,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372 conditions, 363 events. 18/363 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 808 event pairs, 0 based on Foata normal form. 0/265 useless extension candidates. Maximal degree in co-relation 263. Up to 2 conditions per place. [2023-11-19 07:48:06,984 INFO L82 GeneralOperation]: Start removeDead. Operand has 354 places, 365 transitions, 744 flow [2023-11-19 07:48:06,998 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 347 places, 358 transitions, 728 flow [2023-11-19 07:48:07,003 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:48:07,016 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 347 places, 358 transitions, 728 flow [2023-11-19 07:48:07,020 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 347 places, 358 transitions, 728 flow [2023-11-19 07:48:07,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 347 places, 358 transitions, 728 flow [2023-11-19 07:48:07,142 INFO L124 PetriNetUnfolderBase]: 18/358 cut-off events. [2023-11-19 07:48:07,143 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:48:07,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 358 events. 18/358 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 794 event pairs, 0 based on Foata normal form. 0/261 useless extension candidates. Maximal degree in co-relation 263. Up to 2 conditions per place. [2023-11-19 07:48:07,175 INFO L119 LiptonReduction]: Number of co-enabled transitions 33180 [2023-11-19 07:48:27,785 INFO L134 LiptonReduction]: Checked pairs total: 127086 [2023-11-19 07:48:27,786 INFO L136 LiptonReduction]: Total number of compositions: 467 [2023-11-19 07:48:27,802 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:48:27,810 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;@617dff92, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:48:27,810 INFO L358 AbstractCegarLoop]: Starting to check reachability of 142 error locations. [2023-11-19 07:48:27,812 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:48:27,812 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-11-19 07:48:27,812 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:48:27,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:27,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-19 07:48:27,814 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-19 07:48:27,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:27,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1552, now seen corresponding path program 1 times [2023-11-19 07:48:27,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:27,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070355668] [2023-11-19 07:48:27,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:27,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:27,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:27,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:27,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:27,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070355668] [2023-11-19 07:48:27,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070355668] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:27,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:27,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-19 07:48:27,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142005280] [2023-11-19 07:48:27,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:27,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:48:27,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:28,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:48:28,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:48:28,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 349 out of 832 [2023-11-19 07:48:28,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 145 transitions, 302 flow. Second operand has 2 states, 2 states have (on average 349.5) internal successors, (699), 2 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:28,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:28,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 349 of 832 [2023-11-19 07:48:28,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:48:30,507 INFO L124 PetriNetUnfolderBase]: 8425/13445 cut-off events. [2023-11-19 07:48:30,508 INFO L125 PetriNetUnfolderBase]: For 70/70 co-relation queries the response was YES. [2023-11-19 07:48:30,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26356 conditions, 13445 events. 8425/13445 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 79351 event pairs, 7385 based on Foata normal form. 180/7268 useless extension candidates. Maximal degree in co-relation 25917. Up to 12793 conditions per place. [2023-11-19 07:48:30,647 INFO L140 encePairwiseOnDemand]: 782/832 looper letters, 87 selfloop transitions, 0 changer transitions 0/95 dead transitions. [2023-11-19 07:48:30,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 95 transitions, 376 flow [2023-11-19 07:48:30,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:48:30,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 07:48:30,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 835 transitions. [2023-11-19 07:48:30,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5018028846153846 [2023-11-19 07:48:30,678 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 835 transitions. [2023-11-19 07:48:30,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 835 transitions. [2023-11-19 07:48:30,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:48:30,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 835 transitions. [2023-11-19 07:48:30,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 417.5) internal successors, (835), 2 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:30,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 832.0) internal successors, (2496), 3 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:30,716 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 832.0) internal successors, (2496), 3 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:30,718 INFO L175 Difference]: Start difference. First operand has 141 places, 145 transitions, 302 flow. Second operand 2 states and 835 transitions. [2023-11-19 07:48:30,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 95 transitions, 376 flow [2023-11-19 07:48:30,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 95 transitions, 368 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 07:48:30,736 INFO L231 Difference]: Finished difference. Result has 91 places, 95 transitions, 194 flow [2023-11-19 07:48:30,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=832, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=194, PETRI_PLACES=91, PETRI_TRANSITIONS=95} [2023-11-19 07:48:30,745 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -50 predicate places. [2023-11-19 07:48:30,745 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 95 transitions, 194 flow [2023-11-19 07:48:30,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 349.5) internal successors, (699), 2 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:30,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:30,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:48:30,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:48:30,748 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-19 07:48:30,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:30,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1528472, now seen corresponding path program 1 times [2023-11-19 07:48:30,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:30,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084859196] [2023-11-19 07:48:30,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:30,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:30,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:31,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:31,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:31,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084859196] [2023-11-19 07:48:31,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084859196] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:31,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:31,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:48:31,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7035979] [2023-11-19 07:48:31,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:31,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:48:31,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:31,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:48:31,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:48:31,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 832 [2023-11-19 07:48:31,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 95 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 344.0) internal successors, (1032), 3 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:31,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:31,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 832 [2023-11-19 07:48:31,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:48:33,428 INFO L124 PetriNetUnfolderBase]: 8351/13299 cut-off events. [2023-11-19 07:48:33,428 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:48:33,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25998 conditions, 13299 events. 8351/13299 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 78129 event pairs, 7319 based on Foata normal form. 0/7042 useless extension candidates. Maximal degree in co-relation 25995. Up to 12650 conditions per place. [2023-11-19 07:48:33,506 INFO L140 encePairwiseOnDemand]: 828/832 looper letters, 83 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2023-11-19 07:48:33,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 93 transitions, 360 flow [2023-11-19 07:48:33,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:48:33,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:48:33,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1116 transitions. [2023-11-19 07:48:33,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44711538461538464 [2023-11-19 07:48:33,512 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1116 transitions. [2023-11-19 07:48:33,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1116 transitions. [2023-11-19 07:48:33,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:48:33,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1116 transitions. [2023-11-19 07:48:33,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 372.0) internal successors, (1116), 3 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:33,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 832.0) internal successors, (3328), 4 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:33,526 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 832.0) internal successors, (3328), 4 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:33,526 INFO L175 Difference]: Start difference. First operand has 91 places, 95 transitions, 194 flow. Second operand 3 states and 1116 transitions. [2023-11-19 07:48:33,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 93 transitions, 360 flow [2023-11-19 07:48:33,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 93 transitions, 360 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:48:33,531 INFO L231 Difference]: Finished difference. Result has 91 places, 93 transitions, 194 flow [2023-11-19 07:48:33,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=832, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=91, PETRI_TRANSITIONS=93} [2023-11-19 07:48:33,536 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -50 predicate places. [2023-11-19 07:48:33,537 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 93 transitions, 194 flow [2023-11-19 07:48:33,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 344.0) internal successors, (1032), 3 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:33,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:33,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:48:33,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:48:33,541 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-19 07:48:33,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:33,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1528474, now seen corresponding path program 1 times [2023-11-19 07:48:33,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:33,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096292054] [2023-11-19 07:48:33,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:33,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:33,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:33,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:33,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:33,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096292054] [2023-11-19 07:48:33,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096292054] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:33,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:33,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:48:33,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921412799] [2023-11-19 07:48:33,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:33,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:48:33,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:33,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:48:33,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:48:33,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 339 out of 832 [2023-11-19 07:48:33,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 93 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 340.0) internal successors, (1020), 3 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:33,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:33,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 339 of 832 [2023-11-19 07:48:33,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:48:35,511 INFO L124 PetriNetUnfolderBase]: 8277/13153 cut-off events. [2023-11-19 07:48:35,511 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:48:35,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25714 conditions, 13153 events. 8277/13153 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 76995 event pairs, 7253 based on Foata normal form. 0/6996 useless extension candidates. Maximal degree in co-relation 25710. Up to 12509 conditions per place. [2023-11-19 07:48:35,596 INFO L140 encePairwiseOnDemand]: 828/832 looper letters, 81 selfloop transitions, 2 changer transitions 0/91 dead transitions. [2023-11-19 07:48:35,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 91 transitions, 356 flow [2023-11-19 07:48:35,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:48:35,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:48:35,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1102 transitions. [2023-11-19 07:48:35,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44150641025641024 [2023-11-19 07:48:35,602 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1102 transitions. [2023-11-19 07:48:35,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1102 transitions. [2023-11-19 07:48:35,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:48:35,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1102 transitions. [2023-11-19 07:48:35,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 367.3333333333333) internal successors, (1102), 3 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:35,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 832.0) internal successors, (3328), 4 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:35,617 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 832.0) internal successors, (3328), 4 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:35,617 INFO L175 Difference]: Start difference. First operand has 91 places, 93 transitions, 194 flow. Second operand 3 states and 1102 transitions. [2023-11-19 07:48:35,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 91 transitions, 356 flow [2023-11-19 07:48:35,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 91 transitions, 352 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:48:35,621 INFO L231 Difference]: Finished difference. Result has 89 places, 91 transitions, 190 flow [2023-11-19 07:48:35,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=832, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=89, PETRI_TRANSITIONS=91} [2023-11-19 07:48:35,622 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -52 predicate places. [2023-11-19 07:48:35,623 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 91 transitions, 190 flow [2023-11-19 07:48:35,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 340.0) internal successors, (1020), 3 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:35,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:35,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:48:35,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:48:35,625 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-19 07:48:35,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:35,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1528550, now seen corresponding path program 1 times [2023-11-19 07:48:35,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:35,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715813532] [2023-11-19 07:48:35,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:35,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:35,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:35,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:35,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:35,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715813532] [2023-11-19 07:48:35,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715813532] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:35,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:35,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:48:35,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991091566] [2023-11-19 07:48:35,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:35,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:48:35,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:35,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:48:35,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:48:36,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 346 out of 832 [2023-11-19 07:48:36,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 91 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 347.0) internal successors, (1041), 3 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:36,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:36,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 346 of 832 [2023-11-19 07:48:36,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:48:37,283 INFO L124 PetriNetUnfolderBase]: 7267/11553 cut-off events. [2023-11-19 07:48:37,283 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:48:37,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22554 conditions, 11553 events. 7267/11553 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 66139 event pairs, 6311 based on Foata normal form. 0/6470 useless extension candidates. Maximal degree in co-relation 22550. Up to 10954 conditions per place. [2023-11-19 07:48:37,348 INFO L140 encePairwiseOnDemand]: 826/832 looper letters, 77 selfloop transitions, 1 changer transitions 0/86 dead transitions. [2023-11-19 07:48:37,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 86 transitions, 336 flow [2023-11-19 07:48:37,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:48:37,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:48:37,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1121 transitions. [2023-11-19 07:48:37,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44911858974358976 [2023-11-19 07:48:37,353 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1121 transitions. [2023-11-19 07:48:37,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1121 transitions. [2023-11-19 07:48:37,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:48:37,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1121 transitions. [2023-11-19 07:48:37,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 373.6666666666667) internal successors, (1121), 3 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:37,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 832.0) internal successors, (3328), 4 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:37,367 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 832.0) internal successors, (3328), 4 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:37,367 INFO L175 Difference]: Start difference. First operand has 89 places, 91 transitions, 190 flow. Second operand 3 states and 1121 transitions. [2023-11-19 07:48:37,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 86 transitions, 336 flow [2023-11-19 07:48:37,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 86 transitions, 332 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:48:37,370 INFO L231 Difference]: Finished difference. Result has 84 places, 86 transitions, 178 flow [2023-11-19 07:48:37,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=832, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=84, PETRI_TRANSITIONS=86} [2023-11-19 07:48:37,371 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -57 predicate places. [2023-11-19 07:48:37,372 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 86 transitions, 178 flow [2023-11-19 07:48:37,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 347.0) internal successors, (1041), 3 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:37,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:37,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:48:37,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:48:37,373 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-19 07:48:37,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:37,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1528551, now seen corresponding path program 1 times [2023-11-19 07:48:37,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:37,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674817965] [2023-11-19 07:48:37,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:37,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:37,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:37,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:37,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:37,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674817965] [2023-11-19 07:48:37,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674817965] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:37,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:37,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:48:37,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842209286] [2023-11-19 07:48:37,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:37,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:48:37,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:37,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:48:37,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:48:37,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 346 out of 832 [2023-11-19 07:48:37,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 86 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 347.0) internal successors, (1041), 3 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:37,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:37,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 346 of 832 [2023-11-19 07:48:37,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:48:39,007 INFO L124 PetriNetUnfolderBase]: 6477/10303 cut-off events. [2023-11-19 07:48:39,008 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:48:39,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20086 conditions, 10303 events. 6477/10303 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 57960 event pairs, 5577 based on Foata normal form. 0/6044 useless extension candidates. Maximal degree in co-relation 20082. Up to 9739 conditions per place. [2023-11-19 07:48:39,063 INFO L140 encePairwiseOnDemand]: 826/832 looper letters, 72 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2023-11-19 07:48:39,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 82 transitions, 318 flow [2023-11-19 07:48:39,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:48:39,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:48:39,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1116 transitions. [2023-11-19 07:48:39,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44711538461538464 [2023-11-19 07:48:39,069 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1116 transitions. [2023-11-19 07:48:39,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1116 transitions. [2023-11-19 07:48:39,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:48:39,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1116 transitions. [2023-11-19 07:48:39,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 372.0) internal successors, (1116), 3 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:39,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 832.0) internal successors, (3328), 4 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:39,085 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 832.0) internal successors, (3328), 4 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:39,085 INFO L175 Difference]: Start difference. First operand has 84 places, 86 transitions, 178 flow. Second operand 3 states and 1116 transitions. [2023-11-19 07:48:39,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 82 transitions, 318 flow [2023-11-19 07:48:39,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 82 transitions, 317 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:48:39,089 INFO L231 Difference]: Finished difference. Result has 81 places, 82 transitions, 173 flow [2023-11-19 07:48:39,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=832, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=173, PETRI_PLACES=81, PETRI_TRANSITIONS=82} [2023-11-19 07:48:39,093 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -60 predicate places. [2023-11-19 07:48:39,093 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 82 transitions, 173 flow [2023-11-19 07:48:39,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 347.0) internal successors, (1041), 3 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:39,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:39,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:48:39,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:48:39,095 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-19 07:48:39,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:39,095 INFO L85 PathProgramCache]: Analyzing trace with hash 47385045, now seen corresponding path program 1 times [2023-11-19 07:48:39,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:39,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666226242] [2023-11-19 07:48:39,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:39,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:39,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:39,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:39,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:39,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666226242] [2023-11-19 07:48:39,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666226242] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:39,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:39,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:48:39,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169018684] [2023-11-19 07:48:39,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:39,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:48:39,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:39,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:48:39,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:48:39,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 327 out of 832 [2023-11-19 07:48:39,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 82 transitions, 173 flow. Second operand has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:39,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:39,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 327 of 832 [2023-11-19 07:48:39,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:48:40,906 INFO L124 PetriNetUnfolderBase]: 6804/10724 cut-off events. [2023-11-19 07:48:40,907 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:48:40,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21017 conditions, 10724 events. 6804/10724 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 59346 event pairs, 5843 based on Foata normal form. 0/6126 useless extension candidates. Maximal degree in co-relation 21013. Up to 10243 conditions per place. [2023-11-19 07:48:40,964 INFO L140 encePairwiseOnDemand]: 826/832 looper letters, 76 selfloop transitions, 6 changer transitions 0/88 dead transitions. [2023-11-19 07:48:40,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 88 transitions, 349 flow [2023-11-19 07:48:40,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:48:40,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:48:40,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1391 transitions. [2023-11-19 07:48:40,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41796875 [2023-11-19 07:48:40,971 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1391 transitions. [2023-11-19 07:48:40,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1391 transitions. [2023-11-19 07:48:40,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:48:40,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1391 transitions. [2023-11-19 07:48:40,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 347.75) internal successors, (1391), 4 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:40,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 832.0) internal successors, (4160), 5 states have internal predecessors, (4160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:40,989 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 832.0) internal successors, (4160), 5 states have internal predecessors, (4160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:40,989 INFO L175 Difference]: Start difference. First operand has 81 places, 82 transitions, 173 flow. Second operand 4 states and 1391 transitions. [2023-11-19 07:48:40,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 88 transitions, 349 flow [2023-11-19 07:48:40,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 88 transitions, 345 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:48:40,992 INFO L231 Difference]: Finished difference. Result has 84 places, 87 transitions, 208 flow [2023-11-19 07:48:40,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=832, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=208, PETRI_PLACES=84, PETRI_TRANSITIONS=87} [2023-11-19 07:48:40,993 INFO L281 CegarLoopForPetriNet]: 141 programPoint places, -57 predicate places. [2023-11-19 07:48:40,993 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 87 transitions, 208 flow [2023-11-19 07:48:40,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:40,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:48:40,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:48:40,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:48:40,995 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 139 more)] === [2023-11-19 07:48:40,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:40,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1468908738, now seen corresponding path program 1 times [2023-11-19 07:48:40,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:40,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70833111] [2023-11-19 07:48:40,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:40,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:41,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:41,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:41,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:41,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70833111] [2023-11-19 07:48:41,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70833111] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:41,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:41,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:48:41,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612077383] [2023-11-19 07:48:41,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:41,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:48:41,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:41,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:48:41,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:48:44,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 832 [2023-11-19 07:48:44,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 87 transitions, 208 flow. Second operand has 5 states, 5 states have (on average 325.0) internal successors, (1625), 5 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:44,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:48:44,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 832 [2023-11-19 07:48:44,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand