./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758a56cd-cf5f-42e4-9505-2e93a77172b0/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758a56cd-cf5f-42e4-9505-2e93a77172b0/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_758a56cd-cf5f-42e4-9505-2e93a77172b0/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758a56cd-cf5f-42e4-9505-2e93a77172b0/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758a56cd-cf5f-42e4-9505-2e93a77172b0/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_758a56cd-cf5f-42e4-9505-2e93a77172b0/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 6710ae2bfe9a41273181e1b4b9dbdfa98f0dea6daffb771915892955eccb69dd --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:59:07,815 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:59:07,933 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758a56cd-cf5f-42e4-9505-2e93a77172b0/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 07:59:07,940 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:59:07,941 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:59:07,969 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:59:07,970 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:59:07,970 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:59:07,971 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:59:07,972 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:59:07,974 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:59:07,975 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:59:07,975 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:59:07,976 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:59:07,977 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:59:07,978 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:59:07,978 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:59:07,979 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:59:07,979 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 07:59:07,980 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 07:59:07,981 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 07:59:07,981 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:59:07,982 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 07:59:07,982 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:59:07,983 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:59:07,983 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:59:07,984 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:59:07,985 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:59:07,985 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:59:07,986 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:59:07,987 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:59:07,988 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:59:07,988 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:59:07,988 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:59:07,989 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:59:07,989 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:59:07,989 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:59:07,989 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:59:07,990 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_758a56cd-cf5f-42e4-9505-2e93a77172b0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758a56cd-cf5f-42e4-9505-2e93a77172b0/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6710ae2bfe9a41273181e1b4b9dbdfa98f0dea6daffb771915892955eccb69dd [2023-11-19 07:59:08,329 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:59:08,355 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:59:08,360 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:59:08,362 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:59:08,363 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:59:08,364 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758a56cd-cf5f-42e4-9505-2e93a77172b0/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i [2023-11-19 07:59:11,506 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:59:11,757 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:59:11,763 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758a56cd-cf5f-42e4-9505-2e93a77172b0/sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i [2023-11-19 07:59:11,789 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758a56cd-cf5f-42e4-9505-2e93a77172b0/bin/uautomizer-verify-uCwYo4JHxu/data/2dbc336f0/db26e3926ec140cba8023133b5d77b6e/FLAG6d28d84a5 [2023-11-19 07:59:11,804 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758a56cd-cf5f-42e4-9505-2e93a77172b0/bin/uautomizer-verify-uCwYo4JHxu/data/2dbc336f0/db26e3926ec140cba8023133b5d77b6e [2023-11-19 07:59:11,807 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:59:11,808 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:59:11,810 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:59:11,810 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:59:11,820 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:59:11,821 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:59:11" (1/1) ... [2023-11-19 07:59:11,823 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61f936b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:11, skipping insertion in model container [2023-11-19 07:59:11,823 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:59:11" (1/1) ... [2023-11-19 07:59:11,900 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:59:12,375 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:59:12,390 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:59:12,466 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:59:12,520 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:59:12,520 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:12 WrapperNode [2023-11-19 07:59:12,521 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:59:12,522 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:59:12,522 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:59:12,523 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:59:12,531 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:12" (1/1) ... [2023-11-19 07:59:12,565 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:12" (1/1) ... [2023-11-19 07:59:12,604 INFO L138 Inliner]: procedures = 172, calls = 28, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 128 [2023-11-19 07:59:12,605 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:59:12,606 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:59:12,606 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:59:12,607 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:59:12,616 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:12" (1/1) ... [2023-11-19 07:59:12,617 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:12" (1/1) ... [2023-11-19 07:59:12,633 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:12" (1/1) ... [2023-11-19 07:59:12,634 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:12" (1/1) ... [2023-11-19 07:59:12,646 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:12" (1/1) ... [2023-11-19 07:59:12,655 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:12" (1/1) ... [2023-11-19 07:59:12,662 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:12" (1/1) ... [2023-11-19 07:59:12,673 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:12" (1/1) ... [2023-11-19 07:59:12,676 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:59:12,677 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:59:12,678 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:59:12,678 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:59:12,679 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:12" (1/1) ... [2023-11-19 07:59:12,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:59:12,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758a56cd-cf5f-42e4-9505-2e93a77172b0/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:59:12,723 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758a56cd-cf5f-42e4-9505-2e93a77172b0/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:59:12,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_758a56cd-cf5f-42e4-9505-2e93a77172b0/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:59:12,775 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:59:12,776 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2023-11-19 07:59:12,777 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2023-11-19 07:59:12,777 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-19 07:59:12,777 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-19 07:59:12,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:59:12,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:59:12,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:59:12,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:59:12,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:59:12,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:59:12,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:59:12,781 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:59:12,973 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:59:12,975 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:59:13,276 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:59:13,659 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:59:13,660 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 07:59:13,664 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:59:13 BoogieIcfgContainer [2023-11-19 07:59:13,666 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:59:13,669 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:59:13,670 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:59:13,675 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:59:13,675 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:59:11" (1/3) ... [2023-11-19 07:59:13,676 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17e7079f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:59:13, skipping insertion in model container [2023-11-19 07:59:13,677 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:59:12" (2/3) ... [2023-11-19 07:59:13,679 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17e7079f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:59:13, skipping insertion in model container [2023-11-19 07:59:13,679 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:59:13" (3/3) ... [2023-11-19 07:59:13,681 INFO L112 eAbstractionObserver]: Analyzing ICFG 35_double_lock_p3_vs.i [2023-11-19 07:59:13,703 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:59:13,704 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2023-11-19 07:59:13,704 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:59:13,807 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:59:13,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 113 transitions, 234 flow [2023-11-19 07:59:13,942 INFO L124 PetriNetUnfolderBase]: 7/128 cut-off events. [2023-11-19 07:59:13,942 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:59:13,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 128 events. 7/128 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 312 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 109. Up to 4 conditions per place. [2023-11-19 07:59:13,951 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 113 transitions, 234 flow [2023-11-19 07:59:13,958 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 112 places, 112 transitions, 231 flow [2023-11-19 07:59:13,965 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:59:13,981 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 112 places, 112 transitions, 231 flow [2023-11-19 07:59:13,984 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 112 places, 112 transitions, 231 flow [2023-11-19 07:59:13,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 112 transitions, 231 flow [2023-11-19 07:59:14,041 INFO L124 PetriNetUnfolderBase]: 7/128 cut-off events. [2023-11-19 07:59:14,046 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:59:14,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 128 events. 7/128 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 312 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 109. Up to 4 conditions per place. [2023-11-19 07:59:14,053 INFO L119 LiptonReduction]: Number of co-enabled transitions 5014 [2023-11-19 07:59:17,448 INFO L134 LiptonReduction]: Checked pairs total: 10978 [2023-11-19 07:59:17,448 INFO L136 LiptonReduction]: Total number of compositions: 103 [2023-11-19 07:59:17,467 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:59:17,474 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;@564744f1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:59:17,475 INFO L358 AbstractCegarLoop]: Starting to check reachability of 57 error locations. [2023-11-19 07:59:17,477 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:59:17,477 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-19 07:59:17,477 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:59:17,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:17,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-19 07:59:17,479 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-19 07:59:17,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:17,484 INFO L85 PathProgramCache]: Analyzing trace with hash 701, now seen corresponding path program 1 times [2023-11-19 07:59:17,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:17,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718718204] [2023-11-19 07:59:17,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:17,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:17,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:17,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:17,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:17,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718718204] [2023-11-19 07:59:17,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718718204] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:59:17,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:59:17,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-19 07:59:17,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570646093] [2023-11-19 07:59:17,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:59:17,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:59:17,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:17,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:59:17,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:59:17,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 216 [2023-11-19 07:59:17,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 115 flow. Second operand has 2 states, 2 states have (on average 74.5) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:17,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:17,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 216 [2023-11-19 07:59:17,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:59:18,240 INFO L124 PetriNetUnfolderBase]: 1600/2441 cut-off events. [2023-11-19 07:59:18,240 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-19 07:59:18,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4875 conditions, 2441 events. 1600/2441 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 12277 event pairs, 1287 based on Foata normal form. 0/1128 useless extension candidates. Maximal degree in co-relation 4865. Up to 2411 conditions per place. [2023-11-19 07:59:18,273 INFO L140 encePairwiseOnDemand]: 197/216 looper letters, 33 selfloop transitions, 0 changer transitions 0/35 dead transitions. [2023-11-19 07:59:18,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 35 transitions, 143 flow [2023-11-19 07:59:18,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:59:18,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 07:59:18,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 200 transitions. [2023-11-19 07:59:18,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2023-11-19 07:59:18,290 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 200 transitions. [2023-11-19 07:59:18,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 200 transitions. [2023-11-19 07:59:18,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:59:18,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 200 transitions. [2023-11-19 07:59:18,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 100.0) internal successors, (200), 2 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:18,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:18,310 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:18,312 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 115 flow. Second operand 2 states and 200 transitions. [2023-11-19 07:59:18,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 35 transitions, 143 flow [2023-11-19 07:59:18,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 35 transitions, 142 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:59:18,318 INFO L231 Difference]: Finished difference. Result has 39 places, 35 transitions, 76 flow [2023-11-19 07:59:18,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=76, PETRI_PLACES=39, PETRI_TRANSITIONS=35} [2023-11-19 07:59:18,325 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -18 predicate places. [2023-11-19 07:59:18,326 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 35 transitions, 76 flow [2023-11-19 07:59:18,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 74.5) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:18,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:18,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:59:18,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:59:18,327 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-19 07:59:18,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:18,328 INFO L85 PathProgramCache]: Analyzing trace with hash 21476493, now seen corresponding path program 1 times [2023-11-19 07:59:18,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:18,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519180832] [2023-11-19 07:59:18,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:18,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:18,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:18,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:18,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:18,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519180832] [2023-11-19 07:59:18,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519180832] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:59:18,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:59:18,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:59:18,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717572529] [2023-11-19 07:59:18,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:59:18,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:59:18,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:18,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:59:18,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:59:18,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 216 [2023-11-19 07:59:18,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:18,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:18,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 216 [2023-11-19 07:59:18,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:59:18,919 INFO L124 PetriNetUnfolderBase]: 1249/1928 cut-off events. [2023-11-19 07:59:18,920 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-19 07:59:18,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3849 conditions, 1928 events. 1249/1928 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 9373 event pairs, 999 based on Foata normal form. 0/975 useless extension candidates. Maximal degree in co-relation 3845. Up to 1897 conditions per place. [2023-11-19 07:59:18,939 INFO L140 encePairwiseOnDemand]: 214/216 looper letters, 31 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2023-11-19 07:59:18,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 34 transitions, 138 flow [2023-11-19 07:59:18,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:59:18,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:59:18,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 228 transitions. [2023-11-19 07:59:18,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35185185185185186 [2023-11-19 07:59:18,948 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 228 transitions. [2023-11-19 07:59:18,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 228 transitions. [2023-11-19 07:59:18,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:59:18,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 228 transitions. [2023-11-19 07:59:18,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:18,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:18,957 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:18,957 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 76 flow. Second operand 3 states and 228 transitions. [2023-11-19 07:59:18,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 34 transitions, 138 flow [2023-11-19 07:59:18,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 34 transitions, 138 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:59:18,959 INFO L231 Difference]: Finished difference. Result has 40 places, 34 transitions, 76 flow [2023-11-19 07:59:18,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=40, PETRI_TRANSITIONS=34} [2023-11-19 07:59:18,962 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -17 predicate places. [2023-11-19 07:59:18,964 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 34 transitions, 76 flow [2023-11-19 07:59:18,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:18,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:18,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:59:18,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:59:18,967 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-19 07:59:18,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:18,971 INFO L85 PathProgramCache]: Analyzing trace with hash 21476494, now seen corresponding path program 1 times [2023-11-19 07:59:18,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:18,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626804169] [2023-11-19 07:59:18,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:18,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:19,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:19,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:19,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:19,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626804169] [2023-11-19 07:59:19,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626804169] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:59:19,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:59:19,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:59:19,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199960134] [2023-11-19 07:59:19,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:59:19,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:59:19,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:19,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:59:19,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:59:19,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 216 [2023-11-19 07:59:19,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 34 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:19,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:19,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 216 [2023-11-19 07:59:19,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:59:19,332 INFO L124 PetriNetUnfolderBase]: 898/1391 cut-off events. [2023-11-19 07:59:19,333 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-19 07:59:19,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2801 conditions, 1391 events. 898/1391 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 6222 event pairs, 711 based on Foata normal form. 0/798 useless extension candidates. Maximal degree in co-relation 2796. Up to 1384 conditions per place. [2023-11-19 07:59:19,346 INFO L140 encePairwiseOnDemand]: 214/216 looper letters, 30 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2023-11-19 07:59:19,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 33 transitions, 136 flow [2023-11-19 07:59:19,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:59:19,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:59:19,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 236 transitions. [2023-11-19 07:59:19,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36419753086419754 [2023-11-19 07:59:19,348 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 236 transitions. [2023-11-19 07:59:19,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 236 transitions. [2023-11-19 07:59:19,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:59:19,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 236 transitions. [2023-11-19 07:59:19,350 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 07:59:19,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:19,353 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:19,353 INFO L175 Difference]: Start difference. First operand has 40 places, 34 transitions, 76 flow. Second operand 3 states and 236 transitions. [2023-11-19 07:59:19,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 33 transitions, 136 flow [2023-11-19 07:59:19,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 33 transitions, 135 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:59:19,355 INFO L231 Difference]: Finished difference. Result has 40 places, 33 transitions, 75 flow [2023-11-19 07:59:19,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=40, PETRI_TRANSITIONS=33} [2023-11-19 07:59:19,356 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -17 predicate places. [2023-11-19 07:59:19,356 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 75 flow [2023-11-19 07:59:19,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:19,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:19,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:59:19,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:59:19,357 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-19 07:59:19,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:19,358 INFO L85 PathProgramCache]: Analyzing trace with hash 21474494, now seen corresponding path program 1 times [2023-11-19 07:59:19,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:19,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801845355] [2023-11-19 07:59:19,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:19,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:19,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:19,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:19,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:19,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801845355] [2023-11-19 07:59:19,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801845355] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:59:19,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:59:19,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:59:19,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923679324] [2023-11-19 07:59:19,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:59:19,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:59:19,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:19,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:59:19,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:59:19,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 216 [2023-11-19 07:59:19,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:19,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:19,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 216 [2023-11-19 07:59:19,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:59:19,734 INFO L124 PetriNetUnfolderBase]: 555/876 cut-off events. [2023-11-19 07:59:19,735 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-19 07:59:19,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1769 conditions, 876 events. 555/876 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3548 event pairs, 445 based on Foata normal form. 0/591 useless extension candidates. Maximal degree in co-relation 1764. Up to 870 conditions per place. [2023-11-19 07:59:19,743 INFO L140 encePairwiseOnDemand]: 210/216 looper letters, 25 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-11-19 07:59:19,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 28 transitions, 117 flow [2023-11-19 07:59:19,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:59:19,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:59:19,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 250 transitions. [2023-11-19 07:59:19,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38580246913580246 [2023-11-19 07:59:19,745 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 250 transitions. [2023-11-19 07:59:19,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 250 transitions. [2023-11-19 07:59:19,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:59:19,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 250 transitions. [2023-11-19 07:59:19,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 07:59:19,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:19,750 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:19,750 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 75 flow. Second operand 3 states and 250 transitions. [2023-11-19 07:59:19,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 28 transitions, 117 flow [2023-11-19 07:59:19,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 28 transitions, 116 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:59:19,753 INFO L231 Difference]: Finished difference. Result has 36 places, 28 transitions, 66 flow [2023-11-19 07:59:19,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=36, PETRI_TRANSITIONS=28} [2023-11-19 07:59:19,755 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -21 predicate places. [2023-11-19 07:59:19,755 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 28 transitions, 66 flow [2023-11-19 07:59:19,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:19,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:19,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:59:19,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:59:19,757 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-19 07:59:19,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:19,758 INFO L85 PathProgramCache]: Analyzing trace with hash 21474493, now seen corresponding path program 1 times [2023-11-19 07:59:19,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:19,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842839024] [2023-11-19 07:59:19,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:19,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:19,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:19,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:19,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:19,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842839024] [2023-11-19 07:59:19,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842839024] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:59:19,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:59:19,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:59:19,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294701601] [2023-11-19 07:59:19,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:59:19,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:59:19,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:19,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:59:19,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:59:19,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 216 [2023-11-19 07:59:19,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 28 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:19,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:19,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 216 [2023-11-19 07:59:19,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:59:19,993 INFO L124 PetriNetUnfolderBase]: 265/435 cut-off events. [2023-11-19 07:59:19,993 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-19 07:59:19,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 885 conditions, 435 events. 265/435 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1476 event pairs, 217 based on Foata normal form. 15/386 useless extension candidates. Maximal degree in co-relation 880. Up to 430 conditions per place. [2023-11-19 07:59:19,998 INFO L140 encePairwiseOnDemand]: 209/216 looper letters, 19 selfloop transitions, 1 changer transitions 0/22 dead transitions. [2023-11-19 07:59:19,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 22 transitions, 94 flow [2023-11-19 07:59:19,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:59:19,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:59:20,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 245 transitions. [2023-11-19 07:59:20,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37808641975308643 [2023-11-19 07:59:20,000 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 245 transitions. [2023-11-19 07:59:20,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 245 transitions. [2023-11-19 07:59:20,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:59:20,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 245 transitions. [2023-11-19 07:59:20,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:20,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:20,005 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:20,006 INFO L175 Difference]: Start difference. First operand has 36 places, 28 transitions, 66 flow. Second operand 3 states and 245 transitions. [2023-11-19 07:59:20,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 22 transitions, 94 flow [2023-11-19 07:59:20,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 22 transitions, 93 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:59:20,007 INFO L231 Difference]: Finished difference. Result has 31 places, 22 transitions, 55 flow [2023-11-19 07:59:20,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=55, PETRI_PLACES=31, PETRI_TRANSITIONS=22} [2023-11-19 07:59:20,011 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -26 predicate places. [2023-11-19 07:59:20,011 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 22 transitions, 55 flow [2023-11-19 07:59:20,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:20,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:20,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:59:20,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:59:20,012 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err4ASSERT_VIOLATIONMEMORY_LEAK === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-19 07:59:20,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:20,013 INFO L85 PathProgramCache]: Analyzing trace with hash 665709887, now seen corresponding path program 1 times [2023-11-19 07:59:20,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:20,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523054120] [2023-11-19 07:59:20,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:20,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:20,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:20,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:20,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:20,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523054120] [2023-11-19 07:59:20,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523054120] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:59:20,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:59:20,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:59:20,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430423626] [2023-11-19 07:59:20,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:59:20,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:59:20,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:20,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:59:20,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:59:20,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 216 [2023-11-19 07:59:20,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 22 transitions, 55 flow. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:20,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:20,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 216 [2023-11-19 07:59:20,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:59:20,155 INFO L124 PetriNetUnfolderBase]: 257/429 cut-off events. [2023-11-19 07:59:20,155 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:59:20,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 873 conditions, 429 events. 257/429 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1469 event pairs, 69 based on Foata normal form. 0/377 useless extension candidates. Maximal degree in co-relation 868. Up to 318 conditions per place. [2023-11-19 07:59:20,159 INFO L140 encePairwiseOnDemand]: 213/216 looper letters, 23 selfloop transitions, 2 changer transitions 0/27 dead transitions. [2023-11-19 07:59:20,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 27 transitions, 115 flow [2023-11-19 07:59:20,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:59:20,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:59:20,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 230 transitions. [2023-11-19 07:59:20,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3549382716049383 [2023-11-19 07:59:20,161 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 230 transitions. [2023-11-19 07:59:20,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 230 transitions. [2023-11-19 07:59:20,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:59:20,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 230 transitions. [2023-11-19 07:59:20,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 76.66666666666667) internal successors, (230), 3 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:20,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:20,165 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:20,165 INFO L175 Difference]: Start difference. First operand has 31 places, 22 transitions, 55 flow. Second operand 3 states and 230 transitions. [2023-11-19 07:59:20,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 27 transitions, 115 flow [2023-11-19 07:59:20,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 27 transitions, 114 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:59:20,167 INFO L231 Difference]: Finished difference. Result has 33 places, 22 transitions, 62 flow [2023-11-19 07:59:20,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=33, PETRI_TRANSITIONS=22} [2023-11-19 07:59:20,168 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -24 predicate places. [2023-11-19 07:59:20,168 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 22 transitions, 62 flow [2023-11-19 07:59:20,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:20,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:20,169 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:20,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:59:20,169 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2023-11-19 07:59:20,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:20,169 INFO L85 PathProgramCache]: Analyzing trace with hash -150085898, now seen corresponding path program 1 times [2023-11-19 07:59:20,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:20,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750835344] [2023-11-19 07:59:20,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:20,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:20,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:59:20,183 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:59:20,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:59:20,210 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:59:20,210 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:59:20,211 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (56 of 57 remaining) [2023-11-19 07:59:20,213 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 57 remaining) [2023-11-19 07:59:20,213 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 57 remaining) [2023-11-19 07:59:20,213 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 57 remaining) [2023-11-19 07:59:20,213 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 57 remaining) [2023-11-19 07:59:20,214 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 57 remaining) [2023-11-19 07:59:20,214 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 57 remaining) [2023-11-19 07:59:20,214 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 57 remaining) [2023-11-19 07:59:20,214 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 57 remaining) [2023-11-19 07:59:20,214 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 57 remaining) [2023-11-19 07:59:20,215 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 57 remaining) [2023-11-19 07:59:20,215 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 57 remaining) [2023-11-19 07:59:20,215 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 57 remaining) [2023-11-19 07:59:20,215 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 57 remaining) [2023-11-19 07:59:20,215 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 57 remaining) [2023-11-19 07:59:20,216 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 57 remaining) [2023-11-19 07:59:20,216 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 57 remaining) [2023-11-19 07:59:20,216 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 57 remaining) [2023-11-19 07:59:20,216 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 57 remaining) [2023-11-19 07:59:20,216 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 57 remaining) [2023-11-19 07:59:20,217 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 57 remaining) [2023-11-19 07:59:20,217 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 57 remaining) [2023-11-19 07:59:20,217 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 57 remaining) [2023-11-19 07:59:20,217 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 57 remaining) [2023-11-19 07:59:20,217 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 57 remaining) [2023-11-19 07:59:20,218 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONMEMORY_LEAK (31 of 57 remaining) [2023-11-19 07:59:20,218 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 57 remaining) [2023-11-19 07:59:20,218 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 57 remaining) [2023-11-19 07:59:20,218 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 57 remaining) [2023-11-19 07:59:20,218 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 57 remaining) [2023-11-19 07:59:20,219 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (26 of 57 remaining) [2023-11-19 07:59:20,219 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (25 of 57 remaining) [2023-11-19 07:59:20,219 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 57 remaining) [2023-11-19 07:59:20,219 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 57 remaining) [2023-11-19 07:59:20,219 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 57 remaining) [2023-11-19 07:59:20,220 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 57 remaining) [2023-11-19 07:59:20,220 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 57 remaining) [2023-11-19 07:59:20,220 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 57 remaining) [2023-11-19 07:59:20,220 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 57 remaining) [2023-11-19 07:59:20,221 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 57 remaining) [2023-11-19 07:59:20,221 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 57 remaining) [2023-11-19 07:59:20,221 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 57 remaining) [2023-11-19 07:59:20,221 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 57 remaining) [2023-11-19 07:59:20,222 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 57 remaining) [2023-11-19 07:59:20,222 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 57 remaining) [2023-11-19 07:59:20,222 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 57 remaining) [2023-11-19 07:59:20,222 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 57 remaining) [2023-11-19 07:59:20,222 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 57 remaining) [2023-11-19 07:59:20,223 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 57 remaining) [2023-11-19 07:59:20,223 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 57 remaining) [2023-11-19 07:59:20,223 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 57 remaining) [2023-11-19 07:59:20,223 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 57 remaining) [2023-11-19 07:59:20,224 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 57 remaining) [2023-11-19 07:59:20,224 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 57 remaining) [2023-11-19 07:59:20,224 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 57 remaining) [2023-11-19 07:59:20,224 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 57 remaining) [2023-11-19 07:59:20,224 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONMEMORY_LEAK (0 of 57 remaining) [2023-11-19 07:59:20,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:59:20,225 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:20,227 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:59:20,228 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-19 07:59:20,301 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:59:20,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 184 transitions, 388 flow [2023-11-19 07:59:20,337 INFO L124 PetriNetUnfolderBase]: 9/190 cut-off events. [2023-11-19 07:59:20,337 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:59:20,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 190 events. 9/190 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 616 event pairs, 0 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 197. Up to 6 conditions per place. [2023-11-19 07:59:20,339 INFO L82 GeneralOperation]: Start removeDead. Operand has 183 places, 184 transitions, 388 flow [2023-11-19 07:59:20,343 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 157 places, 156 transitions, 325 flow [2023-11-19 07:59:20,343 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:59:20,344 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 157 places, 156 transitions, 325 flow [2023-11-19 07:59:20,344 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 157 places, 156 transitions, 325 flow [2023-11-19 07:59:20,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 156 transitions, 325 flow [2023-11-19 07:59:20,372 INFO L124 PetriNetUnfolderBase]: 9/190 cut-off events. [2023-11-19 07:59:20,373 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:59:20,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 190 events. 9/190 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 620 event pairs, 0 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 174. Up to 6 conditions per place. [2023-11-19 07:59:20,385 INFO L119 LiptonReduction]: Number of co-enabled transitions 12720 [2023-11-19 07:59:24,123 INFO L134 LiptonReduction]: Checked pairs total: 43037 [2023-11-19 07:59:24,124 INFO L136 LiptonReduction]: Total number of compositions: 141 [2023-11-19 07:59:24,126 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:59:24,126 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;@564744f1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:59:24,127 INFO L358 AbstractCegarLoop]: Starting to check reachability of 82 error locations. [2023-11-19 07:59:24,127 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:59:24,128 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-11-19 07:59:24,128 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:59:24,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:24,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-19 07:59:24,128 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-19 07:59:24,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:24,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1096, now seen corresponding path program 1 times [2023-11-19 07:59:24,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:24,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968404179] [2023-11-19 07:59:24,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:24,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:24,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:24,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:24,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:24,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968404179] [2023-11-19 07:59:24,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968404179] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:59:24,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:59:24,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-19 07:59:24,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260850894] [2023-11-19 07:59:24,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:59:24,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:59:24,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:24,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:59:24,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:59:24,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 325 [2023-11-19 07:59:24,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 88 transitions, 189 flow. Second operand has 2 states, 2 states have (on average 108.5) internal successors, (217), 2 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:24,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:24,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 325 [2023-11-19 07:59:24,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:59:28,889 INFO L124 PetriNetUnfolderBase]: 25301/37247 cut-off events. [2023-11-19 07:59:28,889 INFO L125 PetriNetUnfolderBase]: For 501/501 co-relation queries the response was YES. [2023-11-19 07:59:28,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71690 conditions, 37247 events. 25301/37247 cut-off events. For 501/501 co-relation queries the response was YES. Maximal size of possible extension queue 1699. Compared 275544 event pairs, 21292 based on Foata normal form. 0/17546 useless extension candidates. Maximal degree in co-relation 71679. Up to 33987 conditions per place. [2023-11-19 07:59:29,244 INFO L140 encePairwiseOnDemand]: 297/325 looper letters, 46 selfloop transitions, 0 changer transitions 0/60 dead transitions. [2023-11-19 07:59:29,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 60 transitions, 225 flow [2023-11-19 07:59:29,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:59:29,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 07:59:29,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 290 transitions. [2023-11-19 07:59:29,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4461538461538462 [2023-11-19 07:59:29,247 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 290 transitions. [2023-11-19 07:59:29,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 290 transitions. [2023-11-19 07:59:29,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:59:29,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 290 transitions. [2023-11-19 07:59:29,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 145.0) internal successors, (290), 2 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 07:59:29,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 325.0) internal successors, (975), 3 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:29,253 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 325.0) internal successors, (975), 3 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:29,253 INFO L175 Difference]: Start difference. First operand has 92 places, 88 transitions, 189 flow. Second operand 2 states and 290 transitions. [2023-11-19 07:59:29,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 60 transitions, 225 flow [2023-11-19 07:59:29,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 60 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:59:29,260 INFO L231 Difference]: Finished difference. Result has 65 places, 60 transitions, 132 flow [2023-11-19 07:59:29,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=132, PETRI_PLACES=65, PETRI_TRANSITIONS=60} [2023-11-19 07:59:29,262 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, -27 predicate places. [2023-11-19 07:59:29,262 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 60 transitions, 132 flow [2023-11-19 07:59:29,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 108.5) internal successors, (217), 2 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:29,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:29,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:59:29,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 07:59:29,264 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-19 07:59:29,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:29,264 INFO L85 PathProgramCache]: Analyzing trace with hash 33627575, now seen corresponding path program 1 times [2023-11-19 07:59:29,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:29,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402434561] [2023-11-19 07:59:29,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:29,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:29,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:29,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:29,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:29,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402434561] [2023-11-19 07:59:29,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402434561] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:59:29,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:59:29,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:59:29,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657532532] [2023-11-19 07:59:29,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:59:29,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:59:29,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:29,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:59:29,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:59:29,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 325 [2023-11-19 07:59:29,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 60 transitions, 132 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 07:59:29,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:29,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 325 [2023-11-19 07:59:29,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:59:32,337 INFO L124 PetriNetUnfolderBase]: 18474/27492 cut-off events. [2023-11-19 07:59:32,337 INFO L125 PetriNetUnfolderBase]: For 501/501 co-relation queries the response was YES. [2023-11-19 07:59:32,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52939 conditions, 27492 events. 18474/27492 cut-off events. For 501/501 co-relation queries the response was YES. Maximal size of possible extension queue 1210. Compared 197822 event pairs, 15467 based on Foata normal form. 0/13714 useless extension candidates. Maximal degree in co-relation 52934. Up to 24990 conditions per place. [2023-11-19 07:59:32,752 INFO L140 encePairwiseOnDemand]: 323/325 looper letters, 44 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2023-11-19 07:59:32,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 59 transitions, 220 flow [2023-11-19 07:59:32,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:59:32,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:59:32,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 343 transitions. [2023-11-19 07:59:32,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3517948717948718 [2023-11-19 07:59:32,754 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 343 transitions. [2023-11-19 07:59:32,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 343 transitions. [2023-11-19 07:59:32,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:59:32,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 343 transitions. [2023-11-19 07:59:32,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:32,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:32,759 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:32,759 INFO L175 Difference]: Start difference. First operand has 65 places, 60 transitions, 132 flow. Second operand 3 states and 343 transitions. [2023-11-19 07:59:32,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 59 transitions, 220 flow [2023-11-19 07:59:32,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 59 transitions, 220 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:59:32,765 INFO L231 Difference]: Finished difference. Result has 66 places, 59 transitions, 132 flow [2023-11-19 07:59:32,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=66, PETRI_TRANSITIONS=59} [2023-11-19 07:59:32,767 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, -26 predicate places. [2023-11-19 07:59:32,767 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 59 transitions, 132 flow [2023-11-19 07:59:32,767 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 07:59:32,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:32,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:59:32,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 07:59:32,768 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-19 07:59:32,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:32,768 INFO L85 PathProgramCache]: Analyzing trace with hash 33627576, now seen corresponding path program 1 times [2023-11-19 07:59:32,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:32,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068820268] [2023-11-19 07:59:32,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:32,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:32,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:32,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:32,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:32,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068820268] [2023-11-19 07:59:32,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068820268] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:59:32,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:59:32,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:59:32,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754043851] [2023-11-19 07:59:32,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:59:32,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:59:32,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:32,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:59:32,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:59:32,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 325 [2023-11-19 07:59:32,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 59 transitions, 132 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 07:59:32,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:32,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 325 [2023-11-19 07:59:32,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:59:34,569 INFO L124 PetriNetUnfolderBase]: 11647/17737 cut-off events. [2023-11-19 07:59:34,569 INFO L125 PetriNetUnfolderBase]: For 501/501 co-relation queries the response was YES. [2023-11-19 07:59:34,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34190 conditions, 17737 events. 11647/17737 cut-off events. For 501/501 co-relation queries the response was YES. Maximal size of possible extension queue 742. Compared 123061 event pairs, 9642 based on Foata normal form. 0/9882 useless extension candidates. Maximal degree in co-relation 34184. Up to 15994 conditions per place. [2023-11-19 07:59:34,720 INFO L140 encePairwiseOnDemand]: 323/325 looper letters, 43 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2023-11-19 07:59:34,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 58 transitions, 218 flow [2023-11-19 07:59:34,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:59:34,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:59:34,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 351 transitions. [2023-11-19 07:59:34,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36 [2023-11-19 07:59:34,723 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 351 transitions. [2023-11-19 07:59:34,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 351 transitions. [2023-11-19 07:59:34,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:59:34,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 351 transitions. [2023-11-19 07:59:34,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:34,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:34,729 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:34,729 INFO L175 Difference]: Start difference. First operand has 66 places, 59 transitions, 132 flow. Second operand 3 states and 351 transitions. [2023-11-19 07:59:34,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 58 transitions, 218 flow [2023-11-19 07:59:34,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 58 transitions, 217 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:59:34,736 INFO L231 Difference]: Finished difference. Result has 66 places, 58 transitions, 131 flow [2023-11-19 07:59:34,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=66, PETRI_TRANSITIONS=58} [2023-11-19 07:59:34,738 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, -26 predicate places. [2023-11-19 07:59:34,738 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 58 transitions, 131 flow [2023-11-19 07:59:34,739 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 07:59:34,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:34,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:59:34,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 07:59:34,740 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-19 07:59:34,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:34,740 INFO L85 PathProgramCache]: Analyzing trace with hash 33625291, now seen corresponding path program 1 times [2023-11-19 07:59:34,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:34,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623761363] [2023-11-19 07:59:34,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:34,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:34,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:34,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:34,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:34,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623761363] [2023-11-19 07:59:34,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623761363] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:59:34,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:59:34,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:59:34,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132499475] [2023-11-19 07:59:34,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:59:34,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:59:34,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:34,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:59:34,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:59:34,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 325 [2023-11-19 07:59:34,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 131 flow. Second operand has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:34,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:34,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 325 [2023-11-19 07:59:34,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:59:35,854 INFO L124 PetriNetUnfolderBase]: 4823/7804 cut-off events. [2023-11-19 07:59:35,854 INFO L125 PetriNetUnfolderBase]: For 299/299 co-relation queries the response was YES. [2023-11-19 07:59:35,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14772 conditions, 7804 events. 4823/7804 cut-off events. For 299/299 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 51856 event pairs, 3968 based on Foata normal form. 0/5486 useless extension candidates. Maximal degree in co-relation 14766. Up to 6692 conditions per place. [2023-11-19 07:59:35,903 INFO L140 encePairwiseOnDemand]: 314/325 looper letters, 33 selfloop transitions, 1 changer transitions 0/48 dead transitions. [2023-11-19 07:59:35,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 48 transitions, 179 flow [2023-11-19 07:59:35,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:59:35,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:59:35,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 365 transitions. [2023-11-19 07:59:35,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37435897435897436 [2023-11-19 07:59:35,906 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 365 transitions. [2023-11-19 07:59:35,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 365 transitions. [2023-11-19 07:59:35,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:59:35,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 365 transitions. [2023-11-19 07:59:35,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:35,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:35,911 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:35,912 INFO L175 Difference]: Start difference. First operand has 66 places, 58 transitions, 131 flow. Second operand 3 states and 365 transitions. [2023-11-19 07:59:35,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 48 transitions, 179 flow [2023-11-19 07:59:35,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 48 transitions, 178 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:59:35,914 INFO L231 Difference]: Finished difference. Result has 57 places, 48 transitions, 112 flow [2023-11-19 07:59:35,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=57, PETRI_TRANSITIONS=48} [2023-11-19 07:59:35,915 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, -35 predicate places. [2023-11-19 07:59:35,915 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 48 transitions, 112 flow [2023-11-19 07:59:35,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:35,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:35,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-19 07:59:35,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 07:59:35,916 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-19 07:59:35,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:35,917 INFO L85 PathProgramCache]: Analyzing trace with hash 33625292, now seen corresponding path program 1 times [2023-11-19 07:59:35,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:35,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571026202] [2023-11-19 07:59:35,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:35,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:35,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:35,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:35,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:35,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571026202] [2023-11-19 07:59:35,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571026202] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:59:35,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:59:35,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:59:35,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085681217] [2023-11-19 07:59:35,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:59:35,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:59:35,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:35,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:59:35,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:59:36,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 325 [2023-11-19 07:59:36,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 48 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:36,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:36,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 325 [2023-11-19 07:59:36,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:59:36,469 INFO L124 PetriNetUnfolderBase]: 1770/3111 cut-off events. [2023-11-19 07:59:36,469 INFO L125 PetriNetUnfolderBase]: For 159/159 co-relation queries the response was YES. [2023-11-19 07:59:36,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5772 conditions, 3111 events. 1770/3111 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 19125 event pairs, 1453 based on Foata normal form. 170/2839 useless extension candidates. Maximal degree in co-relation 5766. Up to 2505 conditions per place. [2023-11-19 07:59:36,489 INFO L140 encePairwiseOnDemand]: 316/325 looper letters, 25 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-11-19 07:59:36,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 40 transitions, 148 flow [2023-11-19 07:59:36,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:59:36,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:59:36,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 358 transitions. [2023-11-19 07:59:36,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3671794871794872 [2023-11-19 07:59:36,491 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 358 transitions. [2023-11-19 07:59:36,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 358 transitions. [2023-11-19 07:59:36,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:59:36,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 358 transitions. [2023-11-19 07:59:36,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:36,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:36,496 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:36,496 INFO L175 Difference]: Start difference. First operand has 57 places, 48 transitions, 112 flow. Second operand 3 states and 358 transitions. [2023-11-19 07:59:36,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 40 transitions, 148 flow [2023-11-19 07:59:36,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 40 transitions, 147 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:59:36,497 INFO L231 Difference]: Finished difference. Result has 50 places, 40 transitions, 97 flow [2023-11-19 07:59:36,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=50, PETRI_TRANSITIONS=40} [2023-11-19 07:59:36,498 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, -42 predicate places. [2023-11-19 07:59:36,498 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 40 transitions, 97 flow [2023-11-19 07:59:36,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:36,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:36,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:59:36,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 07:59:36,499 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err4ASSERT_VIOLATIONMEMORY_LEAK === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-19 07:59:36,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:36,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1042385017, now seen corresponding path program 1 times [2023-11-19 07:59:36,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:36,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130190808] [2023-11-19 07:59:36,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:36,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:36,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:36,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:36,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:36,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130190808] [2023-11-19 07:59:36,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130190808] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:59:36,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:59:36,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:59:36,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618999581] [2023-11-19 07:59:36,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:59:36,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:59:36,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:36,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:59:36,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:59:36,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 325 [2023-11-19 07:59:36,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 40 transitions, 97 flow. Second operand has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:36,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:36,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 325 [2023-11-19 07:59:36,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:59:36,994 INFO L124 PetriNetUnfolderBase]: 2750/4205 cut-off events. [2023-11-19 07:59:36,994 INFO L125 PetriNetUnfolderBase]: For 166/166 co-relation queries the response was YES. [2023-11-19 07:59:37,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8279 conditions, 4205 events. 2750/4205 cut-off events. For 166/166 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 23635 event pairs, 771 based on Foata normal form. 0/3730 useless extension candidates. Maximal degree in co-relation 8273. Up to 3607 conditions per place. [2023-11-19 07:59:37,013 INFO L140 encePairwiseOnDemand]: 321/325 looper letters, 38 selfloop transitions, 3 changer transitions 0/51 dead transitions. [2023-11-19 07:59:37,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 51 transitions, 206 flow [2023-11-19 07:59:37,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:59:37,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:59:37,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 333 transitions. [2023-11-19 07:59:37,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3415384615384615 [2023-11-19 07:59:37,016 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 333 transitions. [2023-11-19 07:59:37,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 333 transitions. [2023-11-19 07:59:37,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:59:37,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 333 transitions. [2023-11-19 07:59:37,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:37,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:37,020 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 325.0) internal successors, (1300), 4 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:37,021 INFO L175 Difference]: Start difference. First operand has 50 places, 40 transitions, 97 flow. Second operand 3 states and 333 transitions. [2023-11-19 07:59:37,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 51 transitions, 206 flow [2023-11-19 07:59:37,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 51 transitions, 205 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:59:37,023 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 115 flow [2023-11-19 07:59:37,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2023-11-19 07:59:37,024 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, -40 predicate places. [2023-11-19 07:59:37,024 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 115 flow [2023-11-19 07:59:37,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:37,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:37,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:37,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-19 07:59:37,025 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err4ASSERT_VIOLATIONMEMORY_LEAK === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-19 07:59:37,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:37,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1780600401, now seen corresponding path program 1 times [2023-11-19 07:59:37,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:37,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908342578] [2023-11-19 07:59:37,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:37,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:37,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:37,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:37,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:37,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908342578] [2023-11-19 07:59:37,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908342578] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:59:37,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:59:37,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:59:37,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576575000] [2023-11-19 07:59:37,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:59:37,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:59:37,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:37,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:59:37,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:59:37,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 325 [2023-11-19 07:59:37,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 115 flow. Second operand has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:37,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:37,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 325 [2023-11-19 07:59:37,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:59:37,772 INFO L124 PetriNetUnfolderBase]: 3364/5179 cut-off events. [2023-11-19 07:59:37,772 INFO L125 PetriNetUnfolderBase]: For 611/611 co-relation queries the response was YES. [2023-11-19 07:59:37,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10744 conditions, 5179 events. 3364/5179 cut-off events. For 611/611 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 30723 event pairs, 793 based on Foata normal form. 22/4920 useless extension candidates. Maximal degree in co-relation 10737. Up to 3877 conditions per place. [2023-11-19 07:59:37,814 INFO L140 encePairwiseOnDemand]: 316/325 looper letters, 69 selfloop transitions, 11 changer transitions 0/89 dead transitions. [2023-11-19 07:59:37,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 89 transitions, 393 flow [2023-11-19 07:59:37,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:59:37,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:59:37,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 639 transitions. [2023-11-19 07:59:37,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32769230769230767 [2023-11-19 07:59:37,821 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 639 transitions. [2023-11-19 07:59:37,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 639 transitions. [2023-11-19 07:59:37,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:59:37,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 639 transitions. [2023-11-19 07:59:37,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 106.5) internal successors, (639), 6 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:37,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 325.0) internal successors, (2275), 7 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:37,829 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 325.0) internal successors, (2275), 7 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:37,829 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 115 flow. Second operand 6 states and 639 transitions. [2023-11-19 07:59:37,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 89 transitions, 393 flow [2023-11-19 07:59:37,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 89 transitions, 389 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:59:37,832 INFO L231 Difference]: Finished difference. Result has 59 places, 50 transitions, 184 flow [2023-11-19 07:59:37,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=184, PETRI_PLACES=59, PETRI_TRANSITIONS=50} [2023-11-19 07:59:37,834 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, -33 predicate places. [2023-11-19 07:59:37,834 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 50 transitions, 184 flow [2023-11-19 07:59:37,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:37,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:37,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:37,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-19 07:59:37,835 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err4ASSERT_VIOLATIONMEMORY_LEAK === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-19 07:59:37,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:37,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1759855454, now seen corresponding path program 1 times [2023-11-19 07:59:37,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:37,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337121443] [2023-11-19 07:59:37,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:37,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:37,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:37,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:37,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:37,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337121443] [2023-11-19 07:59:37,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337121443] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:59:37,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:59:37,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:59:37,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466912992] [2023-11-19 07:59:37,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:59:37,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:59:37,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:37,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:59:37,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:59:38,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 325 [2023-11-19 07:59:38,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 50 transitions, 184 flow. Second operand has 6 states, 6 states have (on average 93.0) internal successors, (558), 6 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:38,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:38,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 325 [2023-11-19 07:59:38,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:59:39,095 INFO L124 PetriNetUnfolderBase]: 4456/6787 cut-off events. [2023-11-19 07:59:39,096 INFO L125 PetriNetUnfolderBase]: For 2304/2360 co-relation queries the response was YES. [2023-11-19 07:59:39,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15703 conditions, 6787 events. 4456/6787 cut-off events. For 2304/2360 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 41829 event pairs, 1073 based on Foata normal form. 102/6620 useless extension candidates. Maximal degree in co-relation 15693. Up to 3931 conditions per place. [2023-11-19 07:59:39,150 INFO L140 encePairwiseOnDemand]: 314/325 looper letters, 99 selfloop transitions, 22 changer transitions 0/129 dead transitions. [2023-11-19 07:59:39,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 129 transitions, 650 flow [2023-11-19 07:59:39,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:59:39,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-19 07:59:39,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 849 transitions. [2023-11-19 07:59:39,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32653846153846156 [2023-11-19 07:59:39,159 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 849 transitions. [2023-11-19 07:59:39,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 849 transitions. [2023-11-19 07:59:39,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:59:39,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 849 transitions. [2023-11-19 07:59:39,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 106.125) internal successors, (849), 8 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:39,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 325.0) internal successors, (2925), 9 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:39,171 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 325.0) internal successors, (2925), 9 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:39,171 INFO L175 Difference]: Start difference. First operand has 59 places, 50 transitions, 184 flow. Second operand 8 states and 849 transitions. [2023-11-19 07:59:39,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 129 transitions, 650 flow [2023-11-19 07:59:39,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 129 transitions, 631 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-19 07:59:39,183 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 295 flow [2023-11-19 07:59:39,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=325, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=295, PETRI_PLACES=67, PETRI_TRANSITIONS=61} [2023-11-19 07:59:39,185 INFO L281 CegarLoopForPetriNet]: 92 programPoint places, -25 predicate places. [2023-11-19 07:59:39,185 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 295 flow [2023-11-19 07:59:39,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 93.0) internal successors, (558), 6 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:39,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:39,186 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:39,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-19 07:59:39,186 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-19 07:59:39,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:39,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1451496033, now seen corresponding path program 1 times [2023-11-19 07:59:39,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:39,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982972636] [2023-11-19 07:59:39,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:39,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:39,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:59:39,202 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:59:39,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:59:39,225 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:59:39,227 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:59:39,227 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (81 of 82 remaining) [2023-11-19 07:59:39,228 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (80 of 82 remaining) [2023-11-19 07:59:39,228 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (79 of 82 remaining) [2023-11-19 07:59:39,228 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 82 remaining) [2023-11-19 07:59:39,228 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 82 remaining) [2023-11-19 07:59:39,228 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 82 remaining) [2023-11-19 07:59:39,229 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 82 remaining) [2023-11-19 07:59:39,229 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 82 remaining) [2023-11-19 07:59:39,229 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 82 remaining) [2023-11-19 07:59:39,229 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 82 remaining) [2023-11-19 07:59:39,230 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 82 remaining) [2023-11-19 07:59:39,230 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 82 remaining) [2023-11-19 07:59:39,230 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 82 remaining) [2023-11-19 07:59:39,230 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 82 remaining) [2023-11-19 07:59:39,230 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 82 remaining) [2023-11-19 07:59:39,231 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 82 remaining) [2023-11-19 07:59:39,231 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 82 remaining) [2023-11-19 07:59:39,231 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 82 remaining) [2023-11-19 07:59:39,231 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 82 remaining) [2023-11-19 07:59:39,231 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 82 remaining) [2023-11-19 07:59:39,231 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 82 remaining) [2023-11-19 07:59:39,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 82 remaining) [2023-11-19 07:59:39,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 82 remaining) [2023-11-19 07:59:39,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 82 remaining) [2023-11-19 07:59:39,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 82 remaining) [2023-11-19 07:59:39,232 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONMEMORY_LEAK (56 of 82 remaining) [2023-11-19 07:59:39,233 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 82 remaining) [2023-11-19 07:59:39,233 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 82 remaining) [2023-11-19 07:59:39,233 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 82 remaining) [2023-11-19 07:59:39,233 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 82 remaining) [2023-11-19 07:59:39,233 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (51 of 82 remaining) [2023-11-19 07:59:39,233 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (50 of 82 remaining) [2023-11-19 07:59:39,234 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 82 remaining) [2023-11-19 07:59:39,234 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 82 remaining) [2023-11-19 07:59:39,234 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 82 remaining) [2023-11-19 07:59:39,234 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 82 remaining) [2023-11-19 07:59:39,234 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 82 remaining) [2023-11-19 07:59:39,235 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 82 remaining) [2023-11-19 07:59:39,235 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 82 remaining) [2023-11-19 07:59:39,235 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 82 remaining) [2023-11-19 07:59:39,235 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 82 remaining) [2023-11-19 07:59:39,235 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 82 remaining) [2023-11-19 07:59:39,235 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 82 remaining) [2023-11-19 07:59:39,236 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 82 remaining) [2023-11-19 07:59:39,236 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 82 remaining) [2023-11-19 07:59:39,236 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 82 remaining) [2023-11-19 07:59:39,236 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 82 remaining) [2023-11-19 07:59:39,236 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 82 remaining) [2023-11-19 07:59:39,237 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 82 remaining) [2023-11-19 07:59:39,237 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 82 remaining) [2023-11-19 07:59:39,237 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 82 remaining) [2023-11-19 07:59:39,237 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 82 remaining) [2023-11-19 07:59:39,237 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 82 remaining) [2023-11-19 07:59:39,237 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 82 remaining) [2023-11-19 07:59:39,238 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 82 remaining) [2023-11-19 07:59:39,238 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 82 remaining) [2023-11-19 07:59:39,238 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 82 remaining) [2023-11-19 07:59:39,238 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 82 remaining) [2023-11-19 07:59:39,238 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 82 remaining) [2023-11-19 07:59:39,239 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 82 remaining) [2023-11-19 07:59:39,239 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 82 remaining) [2023-11-19 07:59:39,239 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 82 remaining) [2023-11-19 07:59:39,239 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 82 remaining) [2023-11-19 07:59:39,239 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 82 remaining) [2023-11-19 07:59:39,240 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 82 remaining) [2023-11-19 07:59:39,240 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 82 remaining) [2023-11-19 07:59:39,240 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 82 remaining) [2023-11-19 07:59:39,240 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 82 remaining) [2023-11-19 07:59:39,240 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 82 remaining) [2023-11-19 07:59:39,240 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 82 remaining) [2023-11-19 07:59:39,241 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 82 remaining) [2023-11-19 07:59:39,241 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 82 remaining) [2023-11-19 07:59:39,241 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONMEMORY_LEAK (9 of 82 remaining) [2023-11-19 07:59:39,241 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 82 remaining) [2023-11-19 07:59:39,241 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 82 remaining) [2023-11-19 07:59:39,242 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 82 remaining) [2023-11-19 07:59:39,242 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 82 remaining) [2023-11-19 07:59:39,242 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 82 remaining) [2023-11-19 07:59:39,242 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 82 remaining) [2023-11-19 07:59:39,242 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 82 remaining) [2023-11-19 07:59:39,242 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 82 remaining) [2023-11-19 07:59:39,243 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONMEMORY_LEAK (0 of 82 remaining) [2023-11-19 07:59:39,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-19 07:59:39,243 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:59:39,244 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:59:39,244 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-19 07:59:39,337 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:59:39,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 253 places, 255 transitions, 546 flow [2023-11-19 07:59:39,400 INFO L124 PetriNetUnfolderBase]: 11/252 cut-off events. [2023-11-19 07:59:39,401 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 07:59:39,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270 conditions, 252 events. 11/252 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 912 event pairs, 0 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 263. Up to 8 conditions per place. [2023-11-19 07:59:39,404 INFO L82 GeneralOperation]: Start removeDead. Operand has 253 places, 255 transitions, 546 flow [2023-11-19 07:59:39,409 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 202 places, 200 transitions, 421 flow [2023-11-19 07:59:39,409 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:59:39,409 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 202 places, 200 transitions, 421 flow [2023-11-19 07:59:39,410 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 202 places, 200 transitions, 421 flow [2023-11-19 07:59:39,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 200 transitions, 421 flow [2023-11-19 07:59:39,451 INFO L124 PetriNetUnfolderBase]: 11/252 cut-off events. [2023-11-19 07:59:39,451 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 07:59:39,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268 conditions, 252 events. 11/252 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 920 event pairs, 0 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 240. Up to 8 conditions per place. [2023-11-19 07:59:39,472 INFO L119 LiptonReduction]: Number of co-enabled transitions 24210 [2023-11-19 07:59:44,529 INFO L134 LiptonReduction]: Checked pairs total: 106972 [2023-11-19 07:59:44,529 INFO L136 LiptonReduction]: Total number of compositions: 183 [2023-11-19 07:59:44,531 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:59:44,532 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;@564744f1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:59:44,532 INFO L358 AbstractCegarLoop]: Starting to check reachability of 107 error locations. [2023-11-19 07:59:44,533 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:59:44,533 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-11-19 07:59:44,534 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:59:44,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:59:44,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-19 07:59:44,534 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2023-11-19 07:59:44,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:59:44,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1604, now seen corresponding path program 1 times [2023-11-19 07:59:44,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:59:44,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818068335] [2023-11-19 07:59:44,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:59:44,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:59:44,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:59:44,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:59:44,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:59:44,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818068335] [2023-11-19 07:59:44,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818068335] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:59:44,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:59:44,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-19 07:59:44,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048361105] [2023-11-19 07:59:44,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:59:44,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:59:44,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:59:44,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:59:44,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:59:44,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 438 [2023-11-19 07:59:44,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 117 transitions, 255 flow. Second operand has 2 states, 2 states have (on average 142.5) internal successors, (285), 2 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:59:44,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:59:44,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 438 [2023-11-19 07:59:44,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand