./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs-pthread.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a8d12f-e0c8-4e38-91d9-a57a5d4214d7/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a8d12f-e0c8-4e38-91d9-a57a5d4214d7/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_c5a8d12f-e0c8-4e38-91d9-a57a5d4214d7/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a8d12f-e0c8-4e38-91d9-a57a5d4214d7/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs-pthread.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a8d12f-e0c8-4e38-91d9-a57a5d4214d7/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_c5a8d12f-e0c8-4e38-91d9-a57a5d4214d7/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 801883caffd8b582a36607f9ec62109ac5c5dc10c811693a281fb396b4b60131 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:00:00,094 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:00:00,213 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a8d12f-e0c8-4e38-91d9-a57a5d4214d7/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 08:00:00,221 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:00:00,222 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:00:00,263 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:00:00,266 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:00:00,267 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:00:00,268 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:00:00,272 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:00:00,274 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:00:00,274 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:00:00,275 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:00:00,277 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:00:00,277 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:00:00,277 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:00:00,278 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:00:00,278 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:00:00,279 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 08:00:00,279 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 08:00:00,280 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 08:00:00,280 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:00:00,281 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 08:00:00,281 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 08:00:00,281 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:00:00,282 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:00:00,283 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:00:00,283 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:00:00,283 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:00:00,284 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:00:00,285 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:00:00,286 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:00:00,286 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:00:00,286 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:00:00,286 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:00:00,287 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:00:00,287 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:00:00,287 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:00:00,287 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_c5a8d12f-e0c8-4e38-91d9-a57a5d4214d7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a8d12f-e0c8-4e38-91d9-a57a5d4214d7/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 801883caffd8b582a36607f9ec62109ac5c5dc10c811693a281fb396b4b60131 [2023-11-19 08:00:00,571 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:00:00,605 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:00:00,609 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:00:00,610 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:00:00,611 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:00:00,612 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a8d12f-e0c8-4e38-91d9-a57a5d4214d7/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs-pthread.i [2023-11-19 08:00:03,942 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:00:04,244 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:00:04,244 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a8d12f-e0c8-4e38-91d9-a57a5d4214d7/sv-benchmarks/c/pthread-ext/48_ticket_lock_low_contention_vs-pthread.i [2023-11-19 08:00:04,280 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a8d12f-e0c8-4e38-91d9-a57a5d4214d7/bin/uautomizer-verify-uCwYo4JHxu/data/e2c424a73/422a82266bd3490eaefd5fb366088b9e/FLAG6de3344f1 [2023-11-19 08:00:04,297 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a8d12f-e0c8-4e38-91d9-a57a5d4214d7/bin/uautomizer-verify-uCwYo4JHxu/data/e2c424a73/422a82266bd3490eaefd5fb366088b9e [2023-11-19 08:00:04,304 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:00:04,307 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:00:04,310 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:00:04,310 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:00:04,315 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:00:04,316 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:00:04" (1/1) ... [2023-11-19 08:00:04,317 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f307915 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:04, skipping insertion in model container [2023-11-19 08:00:04,317 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:00:04" (1/1) ... [2023-11-19 08:00:04,376 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:00:04,749 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:00:04,763 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:00:04,803 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:00:04,845 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:00:04,846 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:04 WrapperNode [2023-11-19 08:00:04,846 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:00:04,848 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:00:04,848 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:00:04,848 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:00:04,856 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:04" (1/1) ... [2023-11-19 08:00:04,870 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:04" (1/1) ... [2023-11-19 08:00:04,898 INFO L138 Inliner]: procedures = 164, calls = 20, calls flagged for inlining = 4, calls inlined = 5, statements flattened = 69 [2023-11-19 08:00:04,898 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:00:04,899 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:00:04,904 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:00:04,904 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:00:04,918 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:04" (1/1) ... [2023-11-19 08:00:04,919 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:04" (1/1) ... [2023-11-19 08:00:04,922 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:04" (1/1) ... [2023-11-19 08:00:04,923 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:04" (1/1) ... [2023-11-19 08:00:04,928 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:04" (1/1) ... [2023-11-19 08:00:04,932 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:04" (1/1) ... [2023-11-19 08:00:04,934 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:04" (1/1) ... [2023-11-19 08:00:04,935 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:04" (1/1) ... [2023-11-19 08:00:04,938 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:00:04,939 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:00:04,939 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:00:04,940 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:00:04,941 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:04" (1/1) ... [2023-11-19 08:00:04,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:00:04,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a8d12f-e0c8-4e38-91d9-a57a5d4214d7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:00:04,973 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a8d12f-e0c8-4e38-91d9-a57a5d4214d7/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:00:04,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5a8d12f-e0c8-4e38-91d9-a57a5d4214d7/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:00:05,021 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-19 08:00:05,022 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-19 08:00:05,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 08:00:05,023 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 08:00:05,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:00:05,024 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 08:00:05,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 08:00:05,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:00:05,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:00:05,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:00:05,026 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 08:00:05,165 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:00:05,167 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:00:05,326 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:00:05,336 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:00:05,336 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 08:00:05,340 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:00:05 BoogieIcfgContainer [2023-11-19 08:00:05,340 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:00:05,344 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:00:05,344 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:00:05,348 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:00:05,348 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:00:04" (1/3) ... [2023-11-19 08:00:05,349 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a7f8c34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:00:05, skipping insertion in model container [2023-11-19 08:00:05,349 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:00:04" (2/3) ... [2023-11-19 08:00:05,349 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a7f8c34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:00:05, skipping insertion in model container [2023-11-19 08:00:05,350 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:00:05" (3/3) ... [2023-11-19 08:00:05,351 INFO L112 eAbstractionObserver]: Analyzing ICFG 48_ticket_lock_low_contention_vs-pthread.i [2023-11-19 08:00:05,371 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:00:05,371 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2023-11-19 08:00:05,371 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 08:00:05,421 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 08:00:05,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 85 transitions, 174 flow [2023-11-19 08:00:05,520 INFO L124 PetriNetUnfolderBase]: 8/130 cut-off events. [2023-11-19 08:00:05,521 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:00:05,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 130 events. 8/130 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 304 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 65. Up to 4 conditions per place. [2023-11-19 08:00:05,533 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 85 transitions, 174 flow [2023-11-19 08:00:05,538 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 85 transitions, 174 flow [2023-11-19 08:00:05,544 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:00:05,560 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 83 places, 85 transitions, 174 flow [2023-11-19 08:00:05,568 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 83 places, 85 transitions, 174 flow [2023-11-19 08:00:05,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 85 transitions, 174 flow [2023-11-19 08:00:05,607 INFO L124 PetriNetUnfolderBase]: 8/130 cut-off events. [2023-11-19 08:00:05,607 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:00:05,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 130 events. 8/130 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 304 event pairs, 0 based on Foata normal form. 0/111 useless extension candidates. Maximal degree in co-relation 65. Up to 4 conditions per place. [2023-11-19 08:00:05,611 INFO L119 LiptonReduction]: Number of co-enabled transitions 1728 [2023-11-19 08:00:07,933 INFO L134 LiptonReduction]: Checked pairs total: 5274 [2023-11-19 08:00:07,933 INFO L136 LiptonReduction]: Total number of compositions: 80 [2023-11-19 08:00:07,958 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:00:07,965 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;@1e6469f6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:00:07,965 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-19 08:00:07,968 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:00:07,968 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-19 08:00:07,968 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:00:07,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:07,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 08:00:07,970 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 08:00:07,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:07,975 INFO L85 PathProgramCache]: Analyzing trace with hash 10419, now seen corresponding path program 1 times [2023-11-19 08:00:07,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:07,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749276526] [2023-11-19 08:00:07,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:07,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:08,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:08,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:08,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:08,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749276526] [2023-11-19 08:00:08,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749276526] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:08,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:08,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:00:08,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812104515] [2023-11-19 08:00:08,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:08,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:08,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:08,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:08,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:08,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 165 [2023-11-19 08:00:08,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 29 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:08,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:08,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 165 [2023-11-19 08:00:08,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:08,481 INFO L124 PetriNetUnfolderBase]: 36/122 cut-off events. [2023-11-19 08:00:08,481 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:00:08,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 122 events. 36/122 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 614 event pairs, 28 based on Foata normal form. 26/107 useless extension candidates. Maximal degree in co-relation 189. Up to 75 conditions per place. [2023-11-19 08:00:08,484 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 16 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2023-11-19 08:00:08,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 27 transitions, 96 flow [2023-11-19 08:00:08,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:08,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:00:08,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 236 transitions. [2023-11-19 08:00:08,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4767676767676768 [2023-11-19 08:00:08,502 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 236 transitions. [2023-11-19 08:00:08,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 236 transitions. [2023-11-19 08:00:08,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:08,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 236 transitions. [2023-11-19 08:00:08,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:08,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:08,518 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:08,520 INFO L175 Difference]: Start difference. First operand has 28 places, 29 transitions, 62 flow. Second operand 3 states and 236 transitions. [2023-11-19 08:00:08,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 27 transitions, 96 flow [2023-11-19 08:00:08,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 27 transitions, 96 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 08:00:08,525 INFO L231 Difference]: Finished difference. Result has 28 places, 23 transitions, 56 flow [2023-11-19 08:00:08,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=28, PETRI_TRANSITIONS=23} [2023-11-19 08:00:08,532 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 0 predicate places. [2023-11-19 08:00:08,532 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 23 transitions, 56 flow [2023-11-19 08:00:08,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:08,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:08,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 08:00:08,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 08:00:08,534 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 08:00:08,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:08,535 INFO L85 PathProgramCache]: Analyzing trace with hash 10421, now seen corresponding path program 1 times [2023-11-19 08:00:08,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:08,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671732848] [2023-11-19 08:00:08,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:08,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:08,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:08,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:08,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:08,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671732848] [2023-11-19 08:00:08,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671732848] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:08,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:08,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:00:08,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566467586] [2023-11-19 08:00:08,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:08,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:08,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:08,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:08,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:08,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 165 [2023-11-19 08:00:08,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 23 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:08,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:08,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 165 [2023-11-19 08:00:08,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:08,768 INFO L124 PetriNetUnfolderBase]: 32/112 cut-off events. [2023-11-19 08:00:08,768 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:00:08,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 112 events. 32/112 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 547 event pairs, 24 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 181. Up to 65 conditions per place. [2023-11-19 08:00:08,770 INFO L140 encePairwiseOnDemand]: 161/165 looper letters, 15 selfloop transitions, 3 changer transitions 0/26 dead transitions. [2023-11-19 08:00:08,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 26 transitions, 98 flow [2023-11-19 08:00:08,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:08,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:00:08,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 235 transitions. [2023-11-19 08:00:08,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47474747474747475 [2023-11-19 08:00:08,774 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 235 transitions. [2023-11-19 08:00:08,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 235 transitions. [2023-11-19 08:00:08,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:08,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 235 transitions. [2023-11-19 08:00:08,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:08,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:08,779 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:08,780 INFO L175 Difference]: Start difference. First operand has 28 places, 23 transitions, 56 flow. Second operand 3 states and 235 transitions. [2023-11-19 08:00:08,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 26 transitions, 98 flow [2023-11-19 08:00:08,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 26 transitions, 92 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:00:08,782 INFO L231 Difference]: Finished difference. Result has 27 places, 22 transitions, 54 flow [2023-11-19 08:00:08,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=54, PETRI_PLACES=27, PETRI_TRANSITIONS=22} [2023-11-19 08:00:08,783 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -1 predicate places. [2023-11-19 08:00:08,784 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 22 transitions, 54 flow [2023-11-19 08:00:08,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:08,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:08,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 08:00:08,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 08:00:08,785 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 08:00:08,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:08,786 INFO L85 PathProgramCache]: Analyzing trace with hash 10029793, now seen corresponding path program 1 times [2023-11-19 08:00:08,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:08,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964516497] [2023-11-19 08:00:08,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:08,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:08,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:08,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:08,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:08,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964516497] [2023-11-19 08:00:08,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964516497] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:08,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:08,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:00:08,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295845390] [2023-11-19 08:00:08,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:08,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:08,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:08,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:08,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:08,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 165 [2023-11-19 08:00:08,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 22 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:08,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:08,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 165 [2023-11-19 08:00:08,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:09,008 INFO L124 PetriNetUnfolderBase]: 44/137 cut-off events. [2023-11-19 08:00:09,008 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 08:00:09,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 137 events. 44/137 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 562 event pairs, 29 based on Foata normal form. 15/130 useless extension candidates. Maximal degree in co-relation 247. Up to 93 conditions per place. [2023-11-19 08:00:09,010 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 24 selfloop transitions, 4 changer transitions 2/34 dead transitions. [2023-11-19 08:00:09,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 34 transitions, 142 flow [2023-11-19 08:00:09,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:09,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:00:09,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 244 transitions. [2023-11-19 08:00:09,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49292929292929294 [2023-11-19 08:00:09,013 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 244 transitions. [2023-11-19 08:00:09,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 244 transitions. [2023-11-19 08:00:09,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:09,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 244 transitions. [2023-11-19 08:00:09,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:09,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:09,018 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:09,018 INFO L175 Difference]: Start difference. First operand has 27 places, 22 transitions, 54 flow. Second operand 3 states and 244 transitions. [2023-11-19 08:00:09,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 34 transitions, 142 flow [2023-11-19 08:00:09,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 34 transitions, 132 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:00:09,021 INFO L231 Difference]: Finished difference. Result has 29 places, 25 transitions, 84 flow [2023-11-19 08:00:09,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=29, PETRI_TRANSITIONS=25} [2023-11-19 08:00:09,022 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 1 predicate places. [2023-11-19 08:00:09,022 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 25 transitions, 84 flow [2023-11-19 08:00:09,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:09,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:09,023 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-19 08:00:09,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 08:00:09,024 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-19 08:00:09,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:09,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1039845050, now seen corresponding path program 1 times [2023-11-19 08:00:09,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:09,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245180932] [2023-11-19 08:00:09,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:09,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:09,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:00:09,043 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 08:00:09,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:00:09,072 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 08:00:09,072 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 08:00:09,074 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-19 08:00:09,076 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (5 of 7 remaining) [2023-11-19 08:00:09,076 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-19 08:00:09,077 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-11-19 08:00:09,077 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (2 of 7 remaining) [2023-11-19 08:00:09,077 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-11-19 08:00:09,078 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-19 08:00:09,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 08:00:09,078 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-19 08:00:09,081 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 08:00:09,082 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-19 08:00:09,100 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 08:00:09,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 104 transitions, 218 flow [2023-11-19 08:00:09,130 INFO L124 PetriNetUnfolderBase]: 13/196 cut-off events. [2023-11-19 08:00:09,131 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 08:00:09,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 196 events. 13/196 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 560 event pairs, 0 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 131. Up to 6 conditions per place. [2023-11-19 08:00:09,133 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 104 transitions, 218 flow [2023-11-19 08:00:09,135 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 104 transitions, 218 flow [2023-11-19 08:00:09,135 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:00:09,136 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 102 places, 104 transitions, 218 flow [2023-11-19 08:00:09,136 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 102 places, 104 transitions, 218 flow [2023-11-19 08:00:09,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 104 transitions, 218 flow [2023-11-19 08:00:09,160 INFO L124 PetriNetUnfolderBase]: 13/196 cut-off events. [2023-11-19 08:00:09,160 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 08:00:09,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 196 events. 13/196 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 560 event pairs, 0 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 131. Up to 6 conditions per place. [2023-11-19 08:00:09,167 INFO L119 LiptonReduction]: Number of co-enabled transitions 4140 [2023-11-19 08:00:11,246 INFO L134 LiptonReduction]: Checked pairs total: 11616 [2023-11-19 08:00:11,246 INFO L136 LiptonReduction]: Total number of compositions: 96 [2023-11-19 08:00:11,249 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:00:11,250 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;@1e6469f6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:00:11,250 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-19 08:00:11,251 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:00:11,252 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-19 08:00:11,252 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:00:11,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:11,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 08:00:11,252 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-19 08:00:11,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:11,253 INFO L85 PathProgramCache]: Analyzing trace with hash 17458, now seen corresponding path program 1 times [2023-11-19 08:00:11,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:11,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283691319] [2023-11-19 08:00:11,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:11,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:11,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:11,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:11,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:11,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283691319] [2023-11-19 08:00:11,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283691319] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:11,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:11,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:00:11,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180049080] [2023-11-19 08:00:11,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:11,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:11,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:11,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:11,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:11,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 200 [2023-11-19 08:00:11,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 40 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:11,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:11,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 200 [2023-11-19 08:00:11,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:11,554 INFO L124 PetriNetUnfolderBase]: 346/751 cut-off events. [2023-11-19 08:00:11,554 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-11-19 08:00:11,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1376 conditions, 751 events. 346/751 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5203 event pairs, 264 based on Foata normal form. 128/702 useless extension candidates. Maximal degree in co-relation 432. Up to 467 conditions per place. [2023-11-19 08:00:11,562 INFO L140 encePairwiseOnDemand]: 191/200 looper letters, 24 selfloop transitions, 3 changer transitions 0/40 dead transitions. [2023-11-19 08:00:11,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 40 transitions, 144 flow [2023-11-19 08:00:11,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:11,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:00:11,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 297 transitions. [2023-11-19 08:00:11,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.495 [2023-11-19 08:00:11,565 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 297 transitions. [2023-11-19 08:00:11,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 297 transitions. [2023-11-19 08:00:11,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:11,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 297 transitions. [2023-11-19 08:00:11,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:11,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:11,570 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:11,570 INFO L175 Difference]: Start difference. First operand has 40 places, 40 transitions, 90 flow. Second operand 3 states and 297 transitions. [2023-11-19 08:00:11,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 40 transitions, 144 flow [2023-11-19 08:00:11,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 40 transitions, 144 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 08:00:11,573 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 80 flow [2023-11-19 08:00:11,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2023-11-19 08:00:11,574 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -1 predicate places. [2023-11-19 08:00:11,574 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 80 flow [2023-11-19 08:00:11,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:11,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:11,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 08:00:11,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 08:00:11,576 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-19 08:00:11,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:11,576 INFO L85 PathProgramCache]: Analyzing trace with hash 17459, now seen corresponding path program 1 times [2023-11-19 08:00:11,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:11,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258694431] [2023-11-19 08:00:11,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:11,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:11,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:11,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:11,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:11,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258694431] [2023-11-19 08:00:11,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258694431] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:11,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:11,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:00:11,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863898056] [2023-11-19 08:00:11,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:11,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:11,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:11,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:11,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:11,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 200 [2023-11-19 08:00:11,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:11,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:11,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 200 [2023-11-19 08:00:11,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:11,757 INFO L124 PetriNetUnfolderBase]: 305/665 cut-off events. [2023-11-19 08:00:11,757 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2023-11-19 08:00:11,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1280 conditions, 665 events. 305/665 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4417 event pairs, 223 based on Foata normal form. 0/522 useless extension candidates. Maximal degree in co-relation 934. Up to 397 conditions per place. [2023-11-19 08:00:11,764 INFO L140 encePairwiseOnDemand]: 196/200 looper letters, 23 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2023-11-19 08:00:11,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 39 transitions, 146 flow [2023-11-19 08:00:11,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:11,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:00:11,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 282 transitions. [2023-11-19 08:00:11,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47 [2023-11-19 08:00:11,767 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 282 transitions. [2023-11-19 08:00:11,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 282 transitions. [2023-11-19 08:00:11,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:11,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 282 transitions. [2023-11-19 08:00:11,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:11,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:11,772 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:11,772 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 80 flow. Second operand 3 states and 282 transitions. [2023-11-19 08:00:11,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 39 transitions, 146 flow [2023-11-19 08:00:11,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 39 transitions, 140 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:00:11,776 INFO L231 Difference]: Finished difference. Result has 38 places, 31 transitions, 78 flow [2023-11-19 08:00:11,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=38, PETRI_TRANSITIONS=31} [2023-11-19 08:00:11,780 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -2 predicate places. [2023-11-19 08:00:11,781 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 31 transitions, 78 flow [2023-11-19 08:00:11,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:11,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:11,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 08:00:11,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 08:00:11,782 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-19 08:00:11,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:11,783 INFO L85 PathProgramCache]: Analyzing trace with hash 16801154, now seen corresponding path program 1 times [2023-11-19 08:00:11,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:11,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819399693] [2023-11-19 08:00:11,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:11,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:11,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:11,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:11,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:11,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819399693] [2023-11-19 08:00:11,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819399693] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:11,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:11,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:00:11,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834454130] [2023-11-19 08:00:11,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:11,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:11,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:11,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:11,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:11,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 200 [2023-11-19 08:00:11,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:11,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:11,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 200 [2023-11-19 08:00:11,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:12,118 INFO L124 PetriNetUnfolderBase]: 653/1332 cut-off events. [2023-11-19 08:00:12,118 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2023-11-19 08:00:12,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2620 conditions, 1332 events. 653/1332 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 8677 event pairs, 399 based on Foata normal form. 145/1306 useless extension candidates. Maximal degree in co-relation 1820. Up to 864 conditions per place. [2023-11-19 08:00:12,128 INFO L140 encePairwiseOnDemand]: 189/200 looper letters, 33 selfloop transitions, 6 changer transitions 0/47 dead transitions. [2023-11-19 08:00:12,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 47 transitions, 197 flow [2023-11-19 08:00:12,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:12,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:00:12,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 290 transitions. [2023-11-19 08:00:12,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2023-11-19 08:00:12,131 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 290 transitions. [2023-11-19 08:00:12,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 290 transitions. [2023-11-19 08:00:12,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:12,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 290 transitions. [2023-11-19 08:00:12,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:12,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:12,135 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:12,135 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 78 flow. Second operand 3 states and 290 transitions. [2023-11-19 08:00:12,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 47 transitions, 197 flow [2023-11-19 08:00:12,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 47 transitions, 187 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:00:12,138 INFO L231 Difference]: Finished difference. Result has 40 places, 37 transitions, 130 flow [2023-11-19 08:00:12,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=40, PETRI_TRANSITIONS=37} [2023-11-19 08:00:12,139 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 0 predicate places. [2023-11-19 08:00:12,140 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 37 transitions, 130 flow [2023-11-19 08:00:12,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:12,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:12,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:12,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 08:00:12,141 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-19 08:00:12,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:12,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1993134912, now seen corresponding path program 1 times [2023-11-19 08:00:12,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:12,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296092469] [2023-11-19 08:00:12,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:12,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:12,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:12,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:12,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:12,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296092469] [2023-11-19 08:00:12,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296092469] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:12,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:12,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:00:12,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025698052] [2023-11-19 08:00:12,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:12,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:12,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:12,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:12,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:12,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 200 [2023-11-19 08:00:12,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 37 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:12,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:12,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 200 [2023-11-19 08:00:12,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:12,393 INFO L124 PetriNetUnfolderBase]: 366/855 cut-off events. [2023-11-19 08:00:12,393 INFO L125 PetriNetUnfolderBase]: For 248/308 co-relation queries the response was YES. [2023-11-19 08:00:12,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1957 conditions, 855 events. 366/855 cut-off events. For 248/308 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 5715 event pairs, 241 based on Foata normal form. 29/766 useless extension candidates. Maximal degree in co-relation 1332. Up to 434 conditions per place. [2023-11-19 08:00:12,401 INFO L140 encePairwiseOnDemand]: 197/200 looper letters, 25 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-11-19 08:00:12,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 45 transitions, 212 flow [2023-11-19 08:00:12,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:12,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:00:12,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 287 transitions. [2023-11-19 08:00:12,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47833333333333333 [2023-11-19 08:00:12,404 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 287 transitions. [2023-11-19 08:00:12,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 287 transitions. [2023-11-19 08:00:12,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:12,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 287 transitions. [2023-11-19 08:00:12,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:12,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:12,408 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:12,408 INFO L175 Difference]: Start difference. First operand has 40 places, 37 transitions, 130 flow. Second operand 3 states and 287 transitions. [2023-11-19 08:00:12,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 45 transitions, 212 flow [2023-11-19 08:00:12,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 45 transitions, 198 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:00:12,416 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 120 flow [2023-11-19 08:00:12,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2023-11-19 08:00:12,418 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -1 predicate places. [2023-11-19 08:00:12,419 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 120 flow [2023-11-19 08:00:12,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:12,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:12,419 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-19 08:00:12,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 08:00:12,420 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-19 08:00:12,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:12,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1865939966, now seen corresponding path program 1 times [2023-11-19 08:00:12,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:12,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488732214] [2023-11-19 08:00:12,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:12,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:12,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:00:12,446 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 08:00:12,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:00:12,480 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 08:00:12,480 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 08:00:12,480 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-11-19 08:00:12,481 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (6 of 8 remaining) [2023-11-19 08:00:12,481 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2023-11-19 08:00:12,481 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2023-11-19 08:00:12,481 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 8 remaining) [2023-11-19 08:00:12,481 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (2 of 8 remaining) [2023-11-19 08:00:12,482 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 8 remaining) [2023-11-19 08:00:12,482 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2023-11-19 08:00:12,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 08:00:12,482 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-19 08:00:12,483 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 08:00:12,484 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-19 08:00:12,507 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 08:00:12,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 123 transitions, 264 flow [2023-11-19 08:00:12,551 INFO L124 PetriNetUnfolderBase]: 18/262 cut-off events. [2023-11-19 08:00:12,551 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 08:00:12,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 262 events. 18/262 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 822 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 200. Up to 8 conditions per place. [2023-11-19 08:00:12,553 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 123 transitions, 264 flow [2023-11-19 08:00:12,556 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 123 transitions, 264 flow [2023-11-19 08:00:12,556 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:00:12,556 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 123 transitions, 264 flow [2023-11-19 08:00:12,556 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 121 places, 123 transitions, 264 flow [2023-11-19 08:00:12,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 123 transitions, 264 flow [2023-11-19 08:00:12,592 INFO L124 PetriNetUnfolderBase]: 18/262 cut-off events. [2023-11-19 08:00:12,592 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 08:00:12,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 262 events. 18/262 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 822 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 200. Up to 8 conditions per place. [2023-11-19 08:00:12,602 INFO L119 LiptonReduction]: Number of co-enabled transitions 7236 [2023-11-19 08:00:14,861 INFO L134 LiptonReduction]: Checked pairs total: 26391 [2023-11-19 08:00:14,861 INFO L136 LiptonReduction]: Total number of compositions: 114 [2023-11-19 08:00:14,863 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:00:14,864 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;@1e6469f6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:00:14,864 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-11-19 08:00:14,865 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:00:14,865 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-19 08:00:14,865 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:00:14,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:14,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 08:00:14,865 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-19 08:00:14,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:14,866 INFO L85 PathProgramCache]: Analyzing trace with hash 25615, now seen corresponding path program 1 times [2023-11-19 08:00:14,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:14,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604831884] [2023-11-19 08:00:14,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:14,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:14,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:14,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:14,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:14,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604831884] [2023-11-19 08:00:14,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604831884] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:14,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:14,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:00:14,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240732590] [2023-11-19 08:00:14,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:14,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:14,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:14,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:14,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:14,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 237 [2023-11-19 08:00:14,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 53 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:14,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:14,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 237 [2023-11-19 08:00:14,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:15,519 INFO L124 PetriNetUnfolderBase]: 2628/4767 cut-off events. [2023-11-19 08:00:15,519 INFO L125 PetriNetUnfolderBase]: For 223/223 co-relation queries the response was YES. [2023-11-19 08:00:15,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8765 conditions, 4767 events. 2628/4767 cut-off events. For 223/223 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 36713 event pairs, 1940 based on Foata normal form. 556/4525 useless extension candidates. Maximal degree in co-relation 1351. Up to 2876 conditions per place. [2023-11-19 08:00:15,563 INFO L140 encePairwiseOnDemand]: 226/237 looper letters, 32 selfloop transitions, 3 changer transitions 0/51 dead transitions. [2023-11-19 08:00:15,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 51 transitions, 190 flow [2023-11-19 08:00:15,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:15,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:00:15,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 348 transitions. [2023-11-19 08:00:15,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48945147679324896 [2023-11-19 08:00:15,566 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 348 transitions. [2023-11-19 08:00:15,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 348 transitions. [2023-11-19 08:00:15,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:15,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 348 transitions. [2023-11-19 08:00:15,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:15,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:15,572 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:15,572 INFO L175 Difference]: Start difference. First operand has 53 places, 53 transitions, 124 flow. Second operand 3 states and 348 transitions. [2023-11-19 08:00:15,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 51 transitions, 190 flow [2023-11-19 08:00:15,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 51 transitions, 188 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-19 08:00:15,575 INFO L231 Difference]: Finished difference. Result has 48 places, 39 transitions, 100 flow [2023-11-19 08:00:15,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=48, PETRI_TRANSITIONS=39} [2023-11-19 08:00:15,577 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -5 predicate places. [2023-11-19 08:00:15,577 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 39 transitions, 100 flow [2023-11-19 08:00:15,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:15,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:15,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 08:00:15,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 08:00:15,578 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-19 08:00:15,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:15,579 INFO L85 PathProgramCache]: Analyzing trace with hash 25617, now seen corresponding path program 1 times [2023-11-19 08:00:15,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:15,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073424132] [2023-11-19 08:00:15,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:15,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:15,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:15,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:15,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:15,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073424132] [2023-11-19 08:00:15,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073424132] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:15,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:15,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:00:15,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159924171] [2023-11-19 08:00:15,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:15,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:15,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:15,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:15,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:15,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 237 [2023-11-19 08:00:15,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 39 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:15,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:15,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 237 [2023-11-19 08:00:15,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:16,190 INFO L124 PetriNetUnfolderBase]: 2284/4149 cut-off events. [2023-11-19 08:00:16,190 INFO L125 PetriNetUnfolderBase]: For 277/277 co-relation queries the response was YES. [2023-11-19 08:00:16,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7936 conditions, 4149 events. 2284/4149 cut-off events. For 277/277 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 31151 event pairs, 1596 based on Foata normal form. 0/3532 useless extension candidates. Maximal degree in co-relation 5615. Up to 2376 conditions per place. [2023-11-19 08:00:16,232 INFO L140 encePairwiseOnDemand]: 233/237 looper letters, 31 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2023-11-19 08:00:16,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 50 transitions, 190 flow [2023-11-19 08:00:16,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:16,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:00:16,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 341 transitions. [2023-11-19 08:00:16,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47960618846694797 [2023-11-19 08:00:16,235 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 341 transitions. [2023-11-19 08:00:16,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 341 transitions. [2023-11-19 08:00:16,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:16,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 341 transitions. [2023-11-19 08:00:16,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:16,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:16,239 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:16,240 INFO L175 Difference]: Start difference. First operand has 48 places, 39 transitions, 100 flow. Second operand 3 states and 341 transitions. [2023-11-19 08:00:16,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 50 transitions, 190 flow [2023-11-19 08:00:16,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 50 transitions, 184 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:00:16,249 INFO L231 Difference]: Finished difference. Result has 47 places, 38 transitions, 98 flow [2023-11-19 08:00:16,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=47, PETRI_TRANSITIONS=38} [2023-11-19 08:00:16,251 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -6 predicate places. [2023-11-19 08:00:16,251 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 38 transitions, 98 flow [2023-11-19 08:00:16,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:16,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:16,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 08:00:16,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 08:00:16,252 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-19 08:00:16,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:16,253 INFO L85 PathProgramCache]: Analyzing trace with hash 24649944, now seen corresponding path program 1 times [2023-11-19 08:00:16,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:16,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729677] [2023-11-19 08:00:16,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:16,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:16,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:16,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:16,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:16,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729677] [2023-11-19 08:00:16,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729677] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:16,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:16,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:00:16,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056231903] [2023-11-19 08:00:16,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:16,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:16,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:16,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:16,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:16,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 237 [2023-11-19 08:00:16,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 38 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:16,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:16,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 237 [2023-11-19 08:00:16,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:17,533 INFO L124 PetriNetUnfolderBase]: 6735/11514 cut-off events. [2023-11-19 08:00:17,533 INFO L125 PetriNetUnfolderBase]: For 506/506 co-relation queries the response was YES. [2023-11-19 08:00:17,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22398 conditions, 11514 events. 6735/11514 cut-off events. For 506/506 co-relation queries the response was YES. Maximal size of possible extension queue 720. Compared 88933 event pairs, 3882 based on Foata normal form. 1242/11658 useless extension candidates. Maximal degree in co-relation 15815. Up to 7072 conditions per place. [2023-11-19 08:00:17,711 INFO L140 encePairwiseOnDemand]: 224/237 looper letters, 41 selfloop transitions, 8 changer transitions 0/59 dead transitions. [2023-11-19 08:00:17,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 59 transitions, 252 flow [2023-11-19 08:00:17,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:17,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:00:17,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 336 transitions. [2023-11-19 08:00:17,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47257383966244726 [2023-11-19 08:00:17,715 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 336 transitions. [2023-11-19 08:00:17,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 336 transitions. [2023-11-19 08:00:17,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:17,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 336 transitions. [2023-11-19 08:00:17,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:17,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:17,720 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:17,720 INFO L175 Difference]: Start difference. First operand has 47 places, 38 transitions, 98 flow. Second operand 3 states and 336 transitions. [2023-11-19 08:00:17,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 59 transitions, 252 flow [2023-11-19 08:00:17,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 59 transitions, 242 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:00:17,753 INFO L231 Difference]: Finished difference. Result has 49 places, 46 transitions, 166 flow [2023-11-19 08:00:17,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=49, PETRI_TRANSITIONS=46} [2023-11-19 08:00:17,755 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -4 predicate places. [2023-11-19 08:00:17,755 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 46 transitions, 166 flow [2023-11-19 08:00:17,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:17,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:17,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:17,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 08:00:17,756 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-19 08:00:17,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:17,757 INFO L85 PathProgramCache]: Analyzing trace with hash -98503225, now seen corresponding path program 1 times [2023-11-19 08:00:17,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:17,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922896498] [2023-11-19 08:00:17,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:17,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:17,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:17,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:17,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:17,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922896498] [2023-11-19 08:00:17,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922896498] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:17,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:17,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:00:17,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393057020] [2023-11-19 08:00:17,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:17,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:17,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:17,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:17,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:17,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 237 [2023-11-19 08:00:17,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 46 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:17,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:17,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 237 [2023-11-19 08:00:17,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:18,771 INFO L124 PetriNetUnfolderBase]: 4245/7808 cut-off events. [2023-11-19 08:00:18,771 INFO L125 PetriNetUnfolderBase]: For 3066/3181 co-relation queries the response was YES. [2023-11-19 08:00:18,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18449 conditions, 7808 events. 4245/7808 cut-off events. For 3066/3181 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 63672 event pairs, 2757 based on Foata normal form. 101/7161 useless extension candidates. Maximal degree in co-relation 7725. Up to 4122 conditions per place. [2023-11-19 08:00:18,852 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 35 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-11-19 08:00:18,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 59 transitions, 286 flow [2023-11-19 08:00:18,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:18,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:00:18,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 340 transitions. [2023-11-19 08:00:18,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4781997187060478 [2023-11-19 08:00:18,855 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 340 transitions. [2023-11-19 08:00:18,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 340 transitions. [2023-11-19 08:00:18,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:18,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 340 transitions. [2023-11-19 08:00:18,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:18,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:18,860 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:18,860 INFO L175 Difference]: Start difference. First operand has 49 places, 46 transitions, 166 flow. Second operand 3 states and 340 transitions. [2023-11-19 08:00:18,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 59 transitions, 286 flow [2023-11-19 08:00:18,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 59 transitions, 266 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:00:18,870 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 152 flow [2023-11-19 08:00:18,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2023-11-19 08:00:18,870 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -5 predicate places. [2023-11-19 08:00:18,871 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 152 flow [2023-11-19 08:00:18,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:18,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:18,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:18,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-19 08:00:18,872 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-19 08:00:18,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:18,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1671600674, now seen corresponding path program 1 times [2023-11-19 08:00:18,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:18,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681412082] [2023-11-19 08:00:18,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:18,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:18,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:18,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:00:18,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:18,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681412082] [2023-11-19 08:00:18,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681412082] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:18,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:18,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:00:18,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261069664] [2023-11-19 08:00:18,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:18,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:18,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:18,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:18,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:18,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 237 [2023-11-19 08:00:18,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:18,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:18,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 237 [2023-11-19 08:00:18,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:19,079 INFO L124 PetriNetUnfolderBase]: 211/728 cut-off events. [2023-11-19 08:00:19,080 INFO L125 PetriNetUnfolderBase]: For 103/103 co-relation queries the response was YES. [2023-11-19 08:00:19,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1507 conditions, 728 events. 211/728 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 4637 event pairs, 89 based on Foata normal form. 133/837 useless extension candidates. Maximal degree in co-relation 1094. Up to 293 conditions per place. [2023-11-19 08:00:19,083 INFO L140 encePairwiseOnDemand]: 229/237 looper letters, 12 selfloop transitions, 6 changer transitions 7/37 dead transitions. [2023-11-19 08:00:19,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 37 transitions, 166 flow [2023-11-19 08:00:19,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:19,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:00:19,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 320 transitions. [2023-11-19 08:00:19,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.450070323488045 [2023-11-19 08:00:19,086 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 320 transitions. [2023-11-19 08:00:19,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 320 transitions. [2023-11-19 08:00:19,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:19,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 320 transitions. [2023-11-19 08:00:19,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:19,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:19,091 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:19,091 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 152 flow. Second operand 3 states and 320 transitions. [2023-11-19 08:00:19,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 37 transitions, 166 flow [2023-11-19 08:00:19,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 37 transitions, 144 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 08:00:19,094 INFO L231 Difference]: Finished difference. Result has 41 places, 26 transitions, 80 flow [2023-11-19 08:00:19,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=41, PETRI_TRANSITIONS=26} [2023-11-19 08:00:19,094 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -12 predicate places. [2023-11-19 08:00:19,095 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 26 transitions, 80 flow [2023-11-19 08:00:19,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:19,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:19,095 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-19 08:00:19,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-19 08:00:19,096 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-19 08:00:19,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:19,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1129257711, now seen corresponding path program 1 times [2023-11-19 08:00:19,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:19,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721310152] [2023-11-19 08:00:19,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:19,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:19,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:00:19,112 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 08:00:19,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 08:00:19,127 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 08:00:19,127 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 08:00:19,127 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2023-11-19 08:00:19,127 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (7 of 9 remaining) [2023-11-19 08:00:19,128 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2023-11-19 08:00:19,128 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2023-11-19 08:00:19,128 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (4 of 9 remaining) [2023-11-19 08:00:19,128 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK (3 of 9 remaining) [2023-11-19 08:00:19,128 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 9 remaining) [2023-11-19 08:00:19,129 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 9 remaining) [2023-11-19 08:00:19,129 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2023-11-19 08:00:19,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-19 08:00:19,129 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-11-19 08:00:19,130 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 08:00:19,130 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-19 08:00:19,151 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 08:00:19,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 142 transitions, 312 flow [2023-11-19 08:00:19,188 INFO L124 PetriNetUnfolderBase]: 23/328 cut-off events. [2023-11-19 08:00:19,188 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-19 08:00:19,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347 conditions, 328 events. 23/328 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1076 event pairs, 0 based on Foata normal form. 0/276 useless extension candidates. Maximal degree in co-relation 270. Up to 10 conditions per place. [2023-11-19 08:00:19,192 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 142 transitions, 312 flow [2023-11-19 08:00:19,194 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 140 places, 142 transitions, 312 flow [2023-11-19 08:00:19,195 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 08:00:19,195 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 140 places, 142 transitions, 312 flow [2023-11-19 08:00:19,195 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 140 places, 142 transitions, 312 flow [2023-11-19 08:00:19,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 142 transitions, 312 flow [2023-11-19 08:00:19,227 INFO L124 PetriNetUnfolderBase]: 23/328 cut-off events. [2023-11-19 08:00:19,228 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-19 08:00:19,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347 conditions, 328 events. 23/328 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1076 event pairs, 0 based on Foata normal form. 0/276 useless extension candidates. Maximal degree in co-relation 270. Up to 10 conditions per place. [2023-11-19 08:00:19,244 INFO L119 LiptonReduction]: Number of co-enabled transitions 11016 [2023-11-19 08:00:21,477 INFO L134 LiptonReduction]: Checked pairs total: 36169 [2023-11-19 08:00:21,477 INFO L136 LiptonReduction]: Total number of compositions: 123 [2023-11-19 08:00:21,480 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:00:21,482 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;@1e6469f6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:00:21,482 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-11-19 08:00:21,483 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 08:00:21,483 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-19 08:00:21,484 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 08:00:21,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:21,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 08:00:21,484 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-19 08:00:21,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:21,485 INFO L85 PathProgramCache]: Analyzing trace with hash 34739, now seen corresponding path program 1 times [2023-11-19 08:00:21,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:21,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541839756] [2023-11-19 08:00:21,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:21,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:21,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:21,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:21,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:21,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541839756] [2023-11-19 08:00:21,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541839756] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:21,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:21,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:00:21,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044764812] [2023-11-19 08:00:21,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:21,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:21,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:21,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:21,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:21,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 265 [2023-11-19 08:00:21,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 66 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:21,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:21,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 265 [2023-11-19 08:00:21,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:25,717 INFO L124 PetriNetUnfolderBase]: 27910/41895 cut-off events. [2023-11-19 08:00:25,718 INFO L125 PetriNetUnfolderBase]: For 2350/2350 co-relation queries the response was YES. [2023-11-19 08:00:25,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79974 conditions, 41895 events. 27910/41895 cut-off events. For 2350/2350 co-relation queries the response was YES. Maximal size of possible extension queue 2731. Compared 353417 event pairs, 21516 based on Foata normal form. 7724/40390 useless extension candidates. Maximal degree in co-relation 16486. Up to 28775 conditions per place. [2023-11-19 08:00:26,110 INFO L140 encePairwiseOnDemand]: 251/265 looper letters, 46 selfloop transitions, 3 changer transitions 0/68 dead transitions. [2023-11-19 08:00:26,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 68 transitions, 262 flow [2023-11-19 08:00:26,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:26,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:00:26,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 419 transitions. [2023-11-19 08:00:26,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5270440251572327 [2023-11-19 08:00:26,115 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 419 transitions. [2023-11-19 08:00:26,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 419 transitions. [2023-11-19 08:00:26,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:26,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 419 transitions. [2023-11-19 08:00:26,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:26,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:26,121 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:26,121 INFO L175 Difference]: Start difference. First operand has 65 places, 66 transitions, 160 flow. Second operand 3 states and 419 transitions. [2023-11-19 08:00:26,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 68 transitions, 262 flow [2023-11-19 08:00:26,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 68 transitions, 256 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-11-19 08:00:26,126 INFO L231 Difference]: Finished difference. Result has 61 places, 50 transitions, 128 flow [2023-11-19 08:00:26,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=61, PETRI_TRANSITIONS=50} [2023-11-19 08:00:26,127 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -4 predicate places. [2023-11-19 08:00:26,127 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 50 transitions, 128 flow [2023-11-19 08:00:26,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:26,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:26,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-19 08:00:26,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-19 08:00:26,129 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-19 08:00:26,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:26,129 INFO L85 PathProgramCache]: Analyzing trace with hash 34737, now seen corresponding path program 1 times [2023-11-19 08:00:26,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:26,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094139780] [2023-11-19 08:00:26,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:26,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:26,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:26,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:26,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:26,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094139780] [2023-11-19 08:00:26,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094139780] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:26,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:26,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:00:26,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374324375] [2023-11-19 08:00:26,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:26,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:26,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:26,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:26,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:26,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 265 [2023-11-19 08:00:26,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 50 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:26,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:26,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 265 [2023-11-19 08:00:26,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:29,700 INFO L124 PetriNetUnfolderBase]: 24713/37141 cut-off events. [2023-11-19 08:00:29,700 INFO L125 PetriNetUnfolderBase]: For 2185/2185 co-relation queries the response was YES. [2023-11-19 08:00:29,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72750 conditions, 37141 events. 24713/37141 cut-off events. For 2185/2185 co-relation queries the response was YES. Maximal size of possible extension queue 2385. Compared 308708 event pairs, 18319 based on Foata normal form. 0/29434 useless extension candidates. Maximal degree in co-relation 53730. Up to 24541 conditions per place. [2023-11-19 08:00:29,981 INFO L140 encePairwiseOnDemand]: 261/265 looper letters, 45 selfloop transitions, 3 changer transitions 0/67 dead transitions. [2023-11-19 08:00:29,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 67 transitions, 258 flow [2023-11-19 08:00:29,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:29,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:00:29,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 394 transitions. [2023-11-19 08:00:29,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49559748427672956 [2023-11-19 08:00:29,984 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 394 transitions. [2023-11-19 08:00:29,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 394 transitions. [2023-11-19 08:00:29,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:29,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 394 transitions. [2023-11-19 08:00:29,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:29,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:29,991 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:29,992 INFO L175 Difference]: Start difference. First operand has 61 places, 50 transitions, 128 flow. Second operand 3 states and 394 transitions. [2023-11-19 08:00:29,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 67 transitions, 258 flow [2023-11-19 08:00:30,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 67 transitions, 252 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:00:30,145 INFO L231 Difference]: Finished difference. Result has 60 places, 49 transitions, 126 flow [2023-11-19 08:00:30,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=60, PETRI_TRANSITIONS=49} [2023-11-19 08:00:30,146 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -5 predicate places. [2023-11-19 08:00:30,146 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 49 transitions, 126 flow [2023-11-19 08:00:30,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:30,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:30,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 08:00:30,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-19 08:00:30,147 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-19 08:00:30,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:30,148 INFO L85 PathProgramCache]: Analyzing trace with hash 33423459, now seen corresponding path program 1 times [2023-11-19 08:00:30,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:30,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690704147] [2023-11-19 08:00:30,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:30,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:30,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:30,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:30,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:30,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690704147] [2023-11-19 08:00:30,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690704147] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:30,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:30,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:00:30,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016551550] [2023-11-19 08:00:30,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:30,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:30,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:30,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:30,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:30,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 265 [2023-11-19 08:00:30,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 49 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:30,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:30,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 265 [2023-11-19 08:00:30,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:40,847 INFO L124 PetriNetUnfolderBase]: 86419/131249 cut-off events. [2023-11-19 08:00:40,848 INFO L125 PetriNetUnfolderBase]: For 4829/4829 co-relation queries the response was YES. [2023-11-19 08:00:41,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256279 conditions, 131249 events. 86419/131249 cut-off events. For 4829/4829 co-relation queries the response was YES. Maximal size of possible extension queue 6494. Compared 1166799 event pairs, 50905 based on Foata normal form. 13185/127257 useless extension candidates. Maximal degree in co-relation 189395. Up to 83248 conditions per place. [2023-11-19 08:00:41,568 INFO L140 encePairwiseOnDemand]: 246/265 looper letters, 53 selfloop transitions, 10 changer transitions 0/75 dead transitions. [2023-11-19 08:00:41,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 75 transitions, 323 flow [2023-11-19 08:00:41,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:41,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:00:41,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 390 transitions. [2023-11-19 08:00:41,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49056603773584906 [2023-11-19 08:00:41,571 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 390 transitions. [2023-11-19 08:00:41,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 390 transitions. [2023-11-19 08:00:41,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:41,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 390 transitions. [2023-11-19 08:00:41,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:41,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:41,578 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:41,578 INFO L175 Difference]: Start difference. First operand has 60 places, 49 transitions, 126 flow. Second operand 3 states and 390 transitions. [2023-11-19 08:00:41,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 75 transitions, 323 flow [2023-11-19 08:00:42,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 75 transitions, 313 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:00:42,304 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 218 flow [2023-11-19 08:00:42,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=218, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2023-11-19 08:00:42,305 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -3 predicate places. [2023-11-19 08:00:42,305 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 218 flow [2023-11-19 08:00:42,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:42,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:42,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:42,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-19 08:00:42,307 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-19 08:00:42,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:42,307 INFO L85 PathProgramCache]: Analyzing trace with hash -720719154, now seen corresponding path program 1 times [2023-11-19 08:00:42,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:42,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533392394] [2023-11-19 08:00:42,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:42,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:42,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:42,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 08:00:42,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:42,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533392394] [2023-11-19 08:00:42,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533392394] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:42,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:42,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 08:00:42,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058847993] [2023-11-19 08:00:42,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:42,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:42,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:42,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:42,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:42,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 265 [2023-11-19 08:00:42,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:42,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:42,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 265 [2023-11-19 08:00:42,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 08:00:50,862 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([1001] L693-1-->L15-2: Formula: (not (= (mod v_~c~0_198 4294967296) 1)) InVars {~c~0=v_~c~0_198} OutVars{~c~0=v_~c~0_198, thr1Thread2of4ForFork0_reach_error_#t~nondet0#1.offset=|v_thr1Thread2of4ForFork0_reach_error_#t~nondet0#1.offset_17|, thr1Thread2of4ForFork0_reach_error_#t~nondet0#1.base=|v_thr1Thread2of4ForFork0_reach_error_#t~nondet0#1.base_17|} AuxVars[] AssignedVars[thr1Thread2of4ForFork0_reach_error_#t~nondet0#1.offset, thr1Thread2of4ForFork0_reach_error_#t~nondet0#1.base][57], [17#L694true, 2#ULTIMATE.startEXITtrue, thr1Thread1of4ForFork0InUse, 104#L694true, 157#true, thr1Thread2of4ForFork0InUse, 108#L15-2true, thr1Thread3of4ForFork0InUse, 151#true, 93#thr1EXITtrue, Black: 153#(= ~c~0 1), thr1Thread4of4ForFork0InUse]) [2023-11-19 08:00:50,862 INFO L294 olderBase$Statistics]: this new event has 40 ancestors and is cut-off event [2023-11-19 08:00:50,862 INFO L297 olderBase$Statistics]: existing Event has 40 ancestors and is cut-off event [2023-11-19 08:00:50,862 INFO L297 olderBase$Statistics]: existing Event has 40 ancestors and is cut-off event [2023-11-19 08:00:50,862 INFO L297 olderBase$Statistics]: existing Event has 40 ancestors and is cut-off event [2023-11-19 08:00:50,863 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([1045] L693-1-->thr1Err0ASSERT_VIOLATIONMEMORY_LEAK: Formula: (not (= (mod v_~c~0_244 4294967296) 1)) InVars {~c~0=v_~c~0_244} OutVars{~c~0=v_~c~0_244, thr1Thread2of4ForFork0_reach_error_#t~nondet0#1.offset=|v_thr1Thread2of4ForFork0_reach_error_#t~nondet0#1.offset_29|, thr1Thread2of4ForFork0_reach_error_#t~nondet0#1.base=|v_thr1Thread2of4ForFork0_reach_error_#t~nondet0#1.base_29|} AuxVars[] AssignedVars[thr1Thread2of4ForFork0_reach_error_#t~nondet0#1.offset, thr1Thread2of4ForFork0_reach_error_#t~nondet0#1.base][58], [17#L694true, 2#ULTIMATE.startEXITtrue, 110#thr1Err0ASSERT_VIOLATIONMEMORY_LEAKtrue, thr1Thread1of4ForFork0InUse, 104#L694true, 157#true, thr1Thread2of4ForFork0InUse, thr1Thread3of4ForFork0InUse, 151#true, 93#thr1EXITtrue, Black: 153#(= ~c~0 1), thr1Thread4of4ForFork0InUse]) [2023-11-19 08:00:50,863 INFO L294 olderBase$Statistics]: this new event has 40 ancestors and is cut-off event [2023-11-19 08:00:50,863 INFO L297 olderBase$Statistics]: existing Event has 40 ancestors and is cut-off event [2023-11-19 08:00:50,863 INFO L297 olderBase$Statistics]: existing Event has 40 ancestors and is cut-off event [2023-11-19 08:00:50,863 INFO L297 olderBase$Statistics]: existing Event has 40 ancestors and is cut-off event [2023-11-19 08:00:50,867 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([1001] L693-1-->L15-2: Formula: (not (= (mod v_~c~0_198 4294967296) 1)) InVars {~c~0=v_~c~0_198} OutVars{~c~0=v_~c~0_198, thr1Thread2of4ForFork0_reach_error_#t~nondet0#1.offset=|v_thr1Thread2of4ForFork0_reach_error_#t~nondet0#1.offset_17|, thr1Thread2of4ForFork0_reach_error_#t~nondet0#1.base=|v_thr1Thread2of4ForFork0_reach_error_#t~nondet0#1.base_17|} AuxVars[] AssignedVars[thr1Thread2of4ForFork0_reach_error_#t~nondet0#1.offset, thr1Thread2of4ForFork0_reach_error_#t~nondet0#1.base][38], [40#thr1_returnLabel#1true, 17#L694true, 104#L694true, thr1Thread1of4ForFork0InUse, thr1Thread2of4ForFork0InUse, 108#L15-2true, 151#true, 93#thr1EXITtrue, thr1Thread3of4ForFork0InUse, 159#(= (store |#valid| |ULTIMATE.start_main_~#t~0#1.base| 0) |ULTIMATE.start_main_old_#valid#1|), Black: 153#(= ~c~0 1), thr1Thread4of4ForFork0InUse]) [2023-11-19 08:00:50,867 INFO L294 olderBase$Statistics]: this new event has 39 ancestors and is cut-off event [2023-11-19 08:00:50,867 INFO L297 olderBase$Statistics]: existing Event has 39 ancestors and is cut-off event [2023-11-19 08:00:50,867 INFO L297 olderBase$Statistics]: existing Event has 39 ancestors and is cut-off event [2023-11-19 08:00:50,867 INFO L297 olderBase$Statistics]: existing Event has 39 ancestors and is cut-off event [2023-11-19 08:00:50,868 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([1045] L693-1-->thr1Err0ASSERT_VIOLATIONMEMORY_LEAK: Formula: (not (= (mod v_~c~0_244 4294967296) 1)) InVars {~c~0=v_~c~0_244} OutVars{~c~0=v_~c~0_244, thr1Thread2of4ForFork0_reach_error_#t~nondet0#1.offset=|v_thr1Thread2of4ForFork0_reach_error_#t~nondet0#1.offset_29|, thr1Thread2of4ForFork0_reach_error_#t~nondet0#1.base=|v_thr1Thread2of4ForFork0_reach_error_#t~nondet0#1.base_29|} AuxVars[] AssignedVars[thr1Thread2of4ForFork0_reach_error_#t~nondet0#1.offset, thr1Thread2of4ForFork0_reach_error_#t~nondet0#1.base][39], [40#thr1_returnLabel#1true, 17#L694true, 110#thr1Err0ASSERT_VIOLATIONMEMORY_LEAKtrue, 104#L694true, thr1Thread1of4ForFork0InUse, thr1Thread2of4ForFork0InUse, 151#true, 93#thr1EXITtrue, thr1Thread3of4ForFork0InUse, 159#(= (store |#valid| |ULTIMATE.start_main_~#t~0#1.base| 0) |ULTIMATE.start_main_old_#valid#1|), Black: 153#(= ~c~0 1), thr1Thread4of4ForFork0InUse]) [2023-11-19 08:00:50,868 INFO L294 olderBase$Statistics]: this new event has 39 ancestors and is cut-off event [2023-11-19 08:00:50,868 INFO L297 olderBase$Statistics]: existing Event has 39 ancestors and is cut-off event [2023-11-19 08:00:50,868 INFO L297 olderBase$Statistics]: existing Event has 39 ancestors and is cut-off event [2023-11-19 08:00:50,868 INFO L297 olderBase$Statistics]: existing Event has 39 ancestors and is cut-off event [2023-11-19 08:00:50,895 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([1013] L693-1-->thr1Err0ASSERT_VIOLATIONMEMORY_LEAK: Formula: (not (= (mod v_~c~0_210 4294967296) 1)) InVars {~c~0=v_~c~0_210} OutVars{~c~0=v_~c~0_210, thr1Thread1of4ForFork0_reach_error_#t~nondet0#1.offset=|v_thr1Thread1of4ForFork0_reach_error_#t~nondet0#1.offset_23|, thr1Thread1of4ForFork0_reach_error_#t~nondet0#1.base=|v_thr1Thread1of4ForFork0_reach_error_#t~nondet0#1.base_23|} AuxVars[] AssignedVars[thr1Thread1of4ForFork0_reach_error_#t~nondet0#1.offset, thr1Thread1of4ForFork0_reach_error_#t~nondet0#1.base][28], [5#L694true, 40#thr1_returnLabel#1true, 17#L694true, 116#thr1Err0ASSERT_VIOLATIONMEMORY_LEAKtrue, thr1Thread1of4ForFork0InUse, thr1Thread2of4ForFork0InUse, 151#true, 93#thr1EXITtrue, thr1Thread3of4ForFork0InUse, 159#(= (store |#valid| |ULTIMATE.start_main_~#t~0#1.base| 0) |ULTIMATE.start_main_old_#valid#1|), Black: 153#(= ~c~0 1), thr1Thread4of4ForFork0InUse]) [2023-11-19 08:00:50,896 INFO L294 olderBase$Statistics]: this new event has 39 ancestors and is cut-off event [2023-11-19 08:00:50,896 INFO L297 olderBase$Statistics]: existing Event has 39 ancestors and is cut-off event [2023-11-19 08:00:50,896 INFO L297 olderBase$Statistics]: existing Event has 39 ancestors and is cut-off event [2023-11-19 08:00:50,896 INFO L297 olderBase$Statistics]: existing Event has 39 ancestors and is cut-off event [2023-11-19 08:00:50,944 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([938] L694-->thr1FINAL: Formula: (and (= |v_thr1Thread2of4ForFork0_#res#1.offset_5| 0) (= |v_thr1Thread2of4ForFork0_#res#1.base_5| 0) (= (store |v_#pthreadsMutex_122| |v_~#s~0.base_127| (store (select |v_#pthreadsMutex_122| |v_~#s~0.base_127|) |v_~#s~0.offset_127| 0)) |v_#pthreadsMutex_121|)) InVars {#pthreadsMutex=|v_#pthreadsMutex_122|, ~#s~0.offset=|v_~#s~0.offset_127|, ~#s~0.base=|v_~#s~0.base_127|} OutVars{thr1Thread2of4ForFork0_#res#1.offset=|v_thr1Thread2of4ForFork0_#res#1.offset_5|, #pthreadsMutex=|v_#pthreadsMutex_121|, ~#s~0.offset=|v_~#s~0.offset_127|, ~#s~0.base=|v_~#s~0.base_127|, thr1Thread2of4ForFork0_#res#1.base=|v_thr1Thread2of4ForFork0_#res#1.base_5|} AuxVars[] AssignedVars[thr1Thread2of4ForFork0_#res#1.offset, #pthreadsMutex, thr1Thread2of4ForFork0_#res#1.base][61], [130#L693-1true, 17#L694true, 106#thr1FINALtrue, 2#ULTIMATE.startEXITtrue, thr1Thread1of4ForFork0InUse, 157#true, thr1Thread2of4ForFork0InUse, 93#thr1EXITtrue, thr1Thread3of4ForFork0InUse, 151#true, Black: 153#(= ~c~0 1), thr1Thread4of4ForFork0InUse]) [2023-11-19 08:00:50,944 INFO L294 olderBase$Statistics]: this new event has 40 ancestors and is cut-off event [2023-11-19 08:00:50,944 INFO L297 olderBase$Statistics]: existing Event has 40 ancestors and is cut-off event [2023-11-19 08:00:50,944 INFO L297 olderBase$Statistics]: existing Event has 40 ancestors and is cut-off event [2023-11-19 08:00:50,944 INFO L297 olderBase$Statistics]: existing Event has 40 ancestors and is cut-off event [2023-11-19 08:00:50,944 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([1013] L693-1-->thr1Err0ASSERT_VIOLATIONMEMORY_LEAK: Formula: (not (= (mod v_~c~0_210 4294967296) 1)) InVars {~c~0=v_~c~0_210} OutVars{~c~0=v_~c~0_210, thr1Thread1of4ForFork0_reach_error_#t~nondet0#1.offset=|v_thr1Thread1of4ForFork0_reach_error_#t~nondet0#1.offset_23|, thr1Thread1of4ForFork0_reach_error_#t~nondet0#1.base=|v_thr1Thread1of4ForFork0_reach_error_#t~nondet0#1.base_23|} AuxVars[] AssignedVars[thr1Thread1of4ForFork0_reach_error_#t~nondet0#1.offset, thr1Thread1of4ForFork0_reach_error_#t~nondet0#1.base][41], [5#L694true, 17#L694true, 116#thr1Err0ASSERT_VIOLATIONMEMORY_LEAKtrue, 2#ULTIMATE.startEXITtrue, thr1Thread1of4ForFork0InUse, 157#true, thr1Thread2of4ForFork0InUse, 93#thr1EXITtrue, thr1Thread3of4ForFork0InUse, 151#true, Black: 153#(= ~c~0 1), thr1Thread4of4ForFork0InUse]) [2023-11-19 08:00:50,944 INFO L294 olderBase$Statistics]: this new event has 40 ancestors and is cut-off event [2023-11-19 08:00:50,944 INFO L297 olderBase$Statistics]: existing Event has 40 ancestors and is cut-off event [2023-11-19 08:00:50,945 INFO L297 olderBase$Statistics]: existing Event has 40 ancestors and is cut-off event [2023-11-19 08:00:50,945 INFO L297 olderBase$Statistics]: existing Event has 40 ancestors and is cut-off event [2023-11-19 08:00:50,947 INFO L292 olderBase$Statistics]: inserting event number 5 for the transition-marking pair ([1013] L693-1-->thr1Err0ASSERT_VIOLATIONMEMORY_LEAK: Formula: (not (= (mod v_~c~0_210 4294967296) 1)) InVars {~c~0=v_~c~0_210} OutVars{~c~0=v_~c~0_210, thr1Thread1of4ForFork0_reach_error_#t~nondet0#1.offset=|v_thr1Thread1of4ForFork0_reach_error_#t~nondet0#1.offset_23|, thr1Thread1of4ForFork0_reach_error_#t~nondet0#1.base=|v_thr1Thread1of4ForFork0_reach_error_#t~nondet0#1.base_23|} AuxVars[] AssignedVars[thr1Thread1of4ForFork0_reach_error_#t~nondet0#1.offset, thr1Thread1of4ForFork0_reach_error_#t~nondet0#1.base][41], [5#L694true, 116#thr1Err0ASSERT_VIOLATIONMEMORY_LEAKtrue, 17#L694true, 2#ULTIMATE.startEXITtrue, thr1Thread1of4ForFork0InUse, 157#true, thr1Thread2of4ForFork0InUse, 151#true, 93#thr1EXITtrue, thr1Thread3of4ForFork0InUse, Black: 153#(= ~c~0 1), thr1Thread4of4ForFork0InUse]) [2023-11-19 08:00:50,947 INFO L294 olderBase$Statistics]: this new event has 40 ancestors and is cut-off event [2023-11-19 08:00:50,947 INFO L297 olderBase$Statistics]: existing Event has 40 ancestors and is cut-off event [2023-11-19 08:00:50,947 INFO L297 olderBase$Statistics]: existing Event has 40 ancestors and is cut-off event [2023-11-19 08:00:50,948 INFO L297 olderBase$Statistics]: existing Event has 40 ancestors and is cut-off event [2023-11-19 08:00:50,948 INFO L297 olderBase$Statistics]: existing Event has 40 ancestors and is cut-off event [2023-11-19 08:00:50,990 INFO L124 PetriNetUnfolderBase]: 61302/96146 cut-off events. [2023-11-19 08:00:50,990 INFO L125 PetriNetUnfolderBase]: For 31851/34960 co-relation queries the response was YES. [2023-11-19 08:00:51,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233392 conditions, 96146 events. 61302/96146 cut-off events. For 31851/34960 co-relation queries the response was YES. Maximal size of possible extension queue 5432. Compared 887496 event pairs, 41377 based on Foata normal form. 1384/83249 useless extension candidates. Maximal degree in co-relation 171507. Up to 56095 conditions per place. [2023-11-19 08:00:52,020 INFO L140 encePairwiseOnDemand]: 262/265 looper letters, 51 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2023-11-19 08:00:52,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 79 transitions, 396 flow [2023-11-19 08:00:52,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:00:52,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 08:00:52,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 399 transitions. [2023-11-19 08:00:52,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5018867924528302 [2023-11-19 08:00:52,023 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 399 transitions. [2023-11-19 08:00:52,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 399 transitions. [2023-11-19 08:00:52,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 08:00:52,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 399 transitions. [2023-11-19 08:00:52,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:52,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:52,028 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:52,028 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 218 flow. Second operand 3 states and 399 transitions. [2023-11-19 08:00:52,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 79 transitions, 396 flow [2023-11-19 08:00:52,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 79 transitions, 370 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 08:00:52,129 INFO L231 Difference]: Finished difference. Result has 61 places, 58 transitions, 200 flow [2023-11-19 08:00:52,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=61, PETRI_TRANSITIONS=58} [2023-11-19 08:00:52,130 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, -4 predicate places. [2023-11-19 08:00:52,130 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 58 transitions, 200 flow [2023-11-19 08:00:52,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:52,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 08:00:52,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 08:00:52,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-19 08:00:52,131 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-19 08:00:52,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:00:52,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1505428266, now seen corresponding path program 1 times [2023-11-19 08:00:52,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:00:52,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455410573] [2023-11-19 08:00:52,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:00:52,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:00:52,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:00:52,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 08:00:52,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:00:52,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455410573] [2023-11-19 08:00:52,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455410573] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:00:52,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:00:52,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:00:52,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901498183] [2023-11-19 08:00:52,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:00:52,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:00:52,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:00:52,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:00:52,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:00:52,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 265 [2023-11-19 08:00:52,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 58 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 08:00:52,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 08:00:52,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 265 [2023-11-19 08:00:52,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand