./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f943e5-851f-4e59-b27b-7976e1501658/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f943e5-851f-4e59-b27b-7976e1501658/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f943e5-851f-4e59-b27b-7976e1501658/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f943e5-851f-4e59-b27b-7976e1501658/bin/uautomizer-verify-bycVGegfSx/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f943e5-851f-4e59-b27b-7976e1501658/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f943e5-851f-4e59-b27b-7976e1501658/bin/uautomizer-verify-bycVGegfSx --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 4e7050d36e2131966739d0040816e49ede1f1e8b3b668f65d41876950193b1d8 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 21:02:34,734 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 21:02:34,864 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f943e5-851f-4e59-b27b-7976e1501658/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-21 21:02:34,873 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 21:02:34,874 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 21:02:34,926 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 21:02:34,927 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 21:02:34,928 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 21:02:34,929 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 21:02:34,935 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 21:02:34,936 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 21:02:34,937 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 21:02:34,937 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 21:02:34,940 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 21:02:34,940 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 21:02:34,941 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 21:02:34,941 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 21:02:34,942 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 21:02:34,943 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 21:02:34,943 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 21:02:34,944 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 21:02:34,945 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 21:02:34,945 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 21:02:34,946 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 21:02:34,947 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 21:02:34,947 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 21:02:34,949 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 21:02:34,949 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 21:02:34,950 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 21:02:34,951 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 21:02:34,952 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 21:02:34,953 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 21:02:34,953 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 21:02:34,954 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 21:02:34,954 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 21:02:34,955 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 21:02:34,955 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 21:02:34,956 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 21:02:34,956 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 21:02:34,956 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_99f943e5-851f-4e59-b27b-7976e1501658/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f943e5-851f-4e59-b27b-7976e1501658/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4e7050d36e2131966739d0040816e49ede1f1e8b3b668f65d41876950193b1d8 [2023-11-21 21:02:35,245 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 21:02:35,277 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 21:02:35,280 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 21:02:35,281 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 21:02:35,282 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 21:02:35,283 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f943e5-851f-4e59-b27b-7976e1501658/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i [2023-11-21 21:02:38,362 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 21:02:38,712 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 21:02:38,713 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f943e5-851f-4e59-b27b-7976e1501658/sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i [2023-11-21 21:02:38,740 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f943e5-851f-4e59-b27b-7976e1501658/bin/uautomizer-verify-bycVGegfSx/data/328920f5c/ba2bed6c4fce4046b71afbbd5a85dbf3/FLAG44cf9a007 [2023-11-21 21:02:38,757 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f943e5-851f-4e59-b27b-7976e1501658/bin/uautomizer-verify-bycVGegfSx/data/328920f5c/ba2bed6c4fce4046b71afbbd5a85dbf3 [2023-11-21 21:02:38,761 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 21:02:38,763 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 21:02:38,764 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 21:02:38,764 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 21:02:38,776 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 21:02:38,779 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:02:38" (1/1) ... [2023-11-21 21:02:38,780 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1aed0007 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:02:38, skipping insertion in model container [2023-11-21 21:02:38,780 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 09:02:38" (1/1) ... [2023-11-21 21:02:38,837 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 21:02:39,571 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 21:02:39,705 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 21:02:39,807 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 21:02:39,874 INFO L206 MainTranslator]: Completed translation [2023-11-21 21:02:39,875 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:02:39 WrapperNode [2023-11-21 21:02:39,875 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 21:02:39,876 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 21:02:39,876 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 21:02:39,876 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 21:02:39,883 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:02:39" (1/1) ... [2023-11-21 21:02:39,922 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:02:39" (1/1) ... [2023-11-21 21:02:39,962 INFO L138 Inliner]: procedures = 279, calls = 70, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 269 [2023-11-21 21:02:39,963 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 21:02:39,964 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 21:02:39,964 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 21:02:39,964 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 21:02:39,975 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:02:39" (1/1) ... [2023-11-21 21:02:39,975 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:02:39" (1/1) ... [2023-11-21 21:02:39,982 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:02:39" (1/1) ... [2023-11-21 21:02:39,983 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:02:39" (1/1) ... [2023-11-21 21:02:39,996 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:02:39" (1/1) ... [2023-11-21 21:02:40,001 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:02:39" (1/1) ... [2023-11-21 21:02:40,005 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:02:39" (1/1) ... [2023-11-21 21:02:40,008 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:02:39" (1/1) ... [2023-11-21 21:02:40,014 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 21:02:40,015 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 21:02:40,015 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 21:02:40,015 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 21:02:40,016 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:02:39" (1/1) ... [2023-11-21 21:02:40,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 21:02:40,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f943e5-851f-4e59-b27b-7976e1501658/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:02:40,052 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f943e5-851f-4e59-b27b-7976e1501658/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 21:02:40,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f943e5-851f-4e59-b27b-7976e1501658/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 21:02:40,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 21:02:40,103 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-21 21:02:40,103 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-11-21 21:02:40,103 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-11-21 21:02:40,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 21:02:40,104 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-21 21:02:40,104 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 21:02:40,104 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-11-21 21:02:40,104 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-11-21 21:02:40,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 21:02:40,105 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-21 21:02:40,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 21:02:40,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 21:02:40,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-21 21:02:40,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 21:02:40,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 21:02:40,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 21:02:40,108 WARN L212 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-21 21:02:40,304 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 21:02:40,306 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 21:02:40,904 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 21:02:41,230 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 21:02:41,231 INFO L308 CfgBuilder]: Removed 16 assume(true) statements. [2023-11-21 21:02:41,233 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:02:41 BoogieIcfgContainer [2023-11-21 21:02:41,233 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 21:02:41,238 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 21:02:41,239 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 21:02:41,242 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 21:02:41,243 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 09:02:38" (1/3) ... [2023-11-21 21:02:41,243 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f6f106e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:02:41, skipping insertion in model container [2023-11-21 21:02:41,244 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 09:02:39" (2/3) ... [2023-11-21 21:02:41,245 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f6f106e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 09:02:41, skipping insertion in model container [2023-11-21 21:02:41,246 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 09:02:41" (3/3) ... [2023-11-21 21:02:41,248 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_86-lists_racing.i [2023-11-21 21:02:41,268 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 21:02:41,268 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2023-11-21 21:02:41,269 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-21 21:02:41,436 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-21 21:02:41,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 144 transitions, 308 flow [2023-11-21 21:02:41,642 INFO L124 PetriNetUnfolderBase]: 39/286 cut-off events. [2023-11-21 21:02:41,643 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-21 21:02:41,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 286 events. 39/286 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1499 event pairs, 0 based on Foata normal form. 0/155 useless extension candidates. Maximal degree in co-relation 149. Up to 8 conditions per place. [2023-11-21 21:02:41,654 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 144 transitions, 308 flow [2023-11-21 21:02:41,675 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 144 transitions, 308 flow [2023-11-21 21:02:41,695 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 21:02:41,704 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;@27dba711, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 21:02:41,704 INFO L358 AbstractCegarLoop]: Starting to check reachability of 75 error locations. [2023-11-21 21:02:41,709 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-21 21:02:41,710 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-21 21:02:41,710 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 21:02:41,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:02:41,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-21 21:02:41,712 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-21 21:02:41,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:02:41,717 INFO L85 PathProgramCache]: Analyzing trace with hash 749360, now seen corresponding path program 1 times [2023-11-21 21:02:41,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:02:41,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054056036] [2023-11-21 21:02:41,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:02:41,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:02:41,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:02:42,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:02:42,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:02:42,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054056036] [2023-11-21 21:02:42,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054056036] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:02:42,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:02:42,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 21:02:42,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363943958] [2023-11-21 21:02:42,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:02:42,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:02:42,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:02:42,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:02:42,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:02:42,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 144 [2023-11-21 21:02:42,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 144 transitions, 308 flow. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:02:42,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:02:42,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 144 [2023-11-21 21:02:42,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:02:43,857 INFO L124 PetriNetUnfolderBase]: 3268/7613 cut-off events. [2023-11-21 21:02:43,857 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2023-11-21 21:02:43,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12905 conditions, 7613 events. 3268/7613 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 61958 event pairs, 3059 based on Foata normal form. 520/6977 useless extension candidates. Maximal degree in co-relation 11403. Up to 5189 conditions per place. [2023-11-21 21:02:43,942 INFO L140 encePairwiseOnDemand]: 127/144 looper letters, 57 selfloop transitions, 2 changer transitions 0/128 dead transitions. [2023-11-21 21:02:43,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 128 transitions, 394 flow [2023-11-21 21:02:43,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:02:43,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 21:02:43,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 281 transitions. [2023-11-21 21:02:43,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6504629629629629 [2023-11-21 21:02:43,959 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 281 transitions. [2023-11-21 21:02:43,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 281 transitions. [2023-11-21 21:02:43,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:02:43,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 281 transitions. [2023-11-21 21:02:43,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:02:43,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:02:43,973 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:02:43,976 INFO L175 Difference]: Start difference. First operand has 129 places, 144 transitions, 308 flow. Second operand 3 states and 281 transitions. [2023-11-21 21:02:43,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 128 transitions, 394 flow [2023-11-21 21:02:43,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 128 transitions, 394 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-21 21:02:43,991 INFO L231 Difference]: Finished difference. Result has 128 places, 128 transitions, 280 flow [2023-11-21 21:02:43,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=280, PETRI_PLACES=128, PETRI_TRANSITIONS=128} [2023-11-21 21:02:43,998 INFO L281 CegarLoopForPetriNet]: 129 programPoint places, -1 predicate places. [2023-11-21 21:02:43,998 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 128 transitions, 280 flow [2023-11-21 21:02:43,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:02:43,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:02:43,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-21 21:02:43,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 21:02:43,999 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-21 21:02:44,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:02:44,001 INFO L85 PathProgramCache]: Analyzing trace with hash 749361, now seen corresponding path program 1 times [2023-11-21 21:02:44,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:02:44,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040941963] [2023-11-21 21:02:44,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:02:44,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:02:44,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:02:44,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:02:44,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:02:44,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040941963] [2023-11-21 21:02:44,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040941963] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:02:44,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:02:44,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 21:02:44,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968233445] [2023-11-21 21:02:44,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:02:44,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:02:44,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:02:44,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:02:44,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:02:44,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 144 [2023-11-21 21:02:44,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 128 transitions, 280 flow. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:02:44,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:02:44,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 144 [2023-11-21 21:02:44,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:02:45,637 INFO L124 PetriNetUnfolderBase]: 3268/7611 cut-off events. [2023-11-21 21:02:45,638 INFO L125 PetriNetUnfolderBase]: For 157/157 co-relation queries the response was YES. [2023-11-21 21:02:45,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12905 conditions, 7611 events. 3268/7611 cut-off events. For 157/157 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 61963 event pairs, 3059 based on Foata normal form. 2/6458 useless extension candidates. Maximal degree in co-relation 12889. Up to 5189 conditions per place. [2023-11-21 21:02:45,719 INFO L140 encePairwiseOnDemand]: 140/144 looper letters, 56 selfloop transitions, 2 changer transitions 0/126 dead transitions. [2023-11-21 21:02:45,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 126 transitions, 392 flow [2023-11-21 21:02:45,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:02:45,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 21:02:45,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 270 transitions. [2023-11-21 21:02:45,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2023-11-21 21:02:45,727 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 270 transitions. [2023-11-21 21:02:45,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 270 transitions. [2023-11-21 21:02:45,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:02:45,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 270 transitions. [2023-11-21 21:02:45,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:02:45,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:02:45,734 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:02:45,735 INFO L175 Difference]: Start difference. First operand has 128 places, 128 transitions, 280 flow. Second operand 3 states and 270 transitions. [2023-11-21 21:02:45,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 126 transitions, 392 flow [2023-11-21 21:02:45,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 126 transitions, 388 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 21:02:45,745 INFO L231 Difference]: Finished difference. Result has 126 places, 126 transitions, 276 flow [2023-11-21 21:02:45,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=276, PETRI_PLACES=126, PETRI_TRANSITIONS=126} [2023-11-21 21:02:45,746 INFO L281 CegarLoopForPetriNet]: 129 programPoint places, -3 predicate places. [2023-11-21 21:02:45,747 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 126 transitions, 276 flow [2023-11-21 21:02:45,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:02:45,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:02:45,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-21 21:02:45,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 21:02:45,752 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-21 21:02:45,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:02:45,753 INFO L85 PathProgramCache]: Analyzing trace with hash 23233116, now seen corresponding path program 1 times [2023-11-21 21:02:45,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:02:45,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920906643] [2023-11-21 21:02:45,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:02:45,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:02:45,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:02:45,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:02:45,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:02:45,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920906643] [2023-11-21 21:02:45,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920906643] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:02:45,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:02:45,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 21:02:45,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678556760] [2023-11-21 21:02:45,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:02:45,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:02:45,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:02:45,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:02:45,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:02:45,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 144 [2023-11-21 21:02:45,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 126 transitions, 276 flow. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:02:45,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:02:45,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 144 [2023-11-21 21:02:45,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:02:47,095 INFO L124 PetriNetUnfolderBase]: 3268/7617 cut-off events. [2023-11-21 21:02:47,096 INFO L125 PetriNetUnfolderBase]: For 158/158 co-relation queries the response was YES. [2023-11-21 21:02:47,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12916 conditions, 7617 events. 3268/7617 cut-off events. For 158/158 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 61994 event pairs, 3059 based on Foata normal form. 1/6462 useless extension candidates. Maximal degree in co-relation 12891. Up to 5190 conditions per place. [2023-11-21 21:02:47,156 INFO L140 encePairwiseOnDemand]: 141/144 looper letters, 59 selfloop transitions, 2 changer transitions 0/129 dead transitions. [2023-11-21 21:02:47,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 129 transitions, 408 flow [2023-11-21 21:02:47,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:02:47,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 21:02:47,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 278 transitions. [2023-11-21 21:02:47,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6435185185185185 [2023-11-21 21:02:47,159 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 278 transitions. [2023-11-21 21:02:47,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 278 transitions. [2023-11-21 21:02:47,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:02:47,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 278 transitions. [2023-11-21 21:02:47,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:02:47,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:02:47,163 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:02:47,163 INFO L175 Difference]: Start difference. First operand has 126 places, 126 transitions, 276 flow. Second operand 3 states and 278 transitions. [2023-11-21 21:02:47,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 129 transitions, 408 flow [2023-11-21 21:02:47,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 129 transitions, 400 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 21:02:47,174 INFO L231 Difference]: Finished difference. Result has 127 places, 127 transitions, 284 flow [2023-11-21 21:02:47,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=284, PETRI_PLACES=127, PETRI_TRANSITIONS=127} [2023-11-21 21:02:47,176 INFO L281 CegarLoopForPetriNet]: 129 programPoint places, -2 predicate places. [2023-11-21 21:02:47,176 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 127 transitions, 284 flow [2023-11-21 21:02:47,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:02:47,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:02:47,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-21 21:02:47,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 21:02:47,177 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-21 21:02:47,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:02:47,178 INFO L85 PathProgramCache]: Analyzing trace with hash 720157560, now seen corresponding path program 1 times [2023-11-21 21:02:47,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:02:47,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645907175] [2023-11-21 21:02:47,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:02:47,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:02:47,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:02:47,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:02:47,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:02:47,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645907175] [2023-11-21 21:02:47,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645907175] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:02:47,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:02:47,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 21:02:47,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700911226] [2023-11-21 21:02:47,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:02:47,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 21:02:47,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:02:47,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 21:02:47,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-21 21:02:47,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 144 [2023-11-21 21:02:47,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 127 transitions, 284 flow. Second operand has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:02:47,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:02:47,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 144 [2023-11-21 21:02:47,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:02:49,156 INFO L124 PetriNetUnfolderBase]: 4054/9553 cut-off events. [2023-11-21 21:02:49,156 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2023-11-21 21:02:49,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16310 conditions, 9553 events. 4054/9553 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 83690 event pairs, 2177 based on Foata normal form. 2/8058 useless extension candidates. Maximal degree in co-relation 16290. Up to 3712 conditions per place. [2023-11-21 21:02:49,249 INFO L140 encePairwiseOnDemand]: 137/144 looper letters, 131 selfloop transitions, 4 changer transitions 0/199 dead transitions. [2023-11-21 21:02:49,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 199 transitions, 698 flow [2023-11-21 21:02:49,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 21:02:49,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-21 21:02:49,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 411 transitions. [2023-11-21 21:02:49,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7135416666666666 [2023-11-21 21:02:49,253 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 411 transitions. [2023-11-21 21:02:49,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 411 transitions. [2023-11-21 21:02:49,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:02:49,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 411 transitions. [2023-11-21 21:02:49,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 102.75) internal successors, (411), 4 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:02:49,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 144.0) internal successors, (720), 5 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:02:49,259 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 144.0) internal successors, (720), 5 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:02:49,260 INFO L175 Difference]: Start difference. First operand has 127 places, 127 transitions, 284 flow. Second operand 4 states and 411 transitions. [2023-11-21 21:02:49,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 199 transitions, 698 flow [2023-11-21 21:02:49,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 199 transitions, 696 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 21:02:49,274 INFO L231 Difference]: Finished difference. Result has 131 places, 128 transitions, 312 flow [2023-11-21 21:02:49,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=312, PETRI_PLACES=131, PETRI_TRANSITIONS=128} [2023-11-21 21:02:49,276 INFO L281 CegarLoopForPetriNet]: 129 programPoint places, 2 predicate places. [2023-11-21 21:02:49,277 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 128 transitions, 312 flow [2023-11-21 21:02:49,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 69.0) internal successors, (345), 5 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:02:49,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:02:49,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-21 21:02:49,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 21:02:49,278 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-21 21:02:49,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:02:49,279 INFO L85 PathProgramCache]: Analyzing trace with hash 720157561, now seen corresponding path program 1 times [2023-11-21 21:02:49,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:02:49,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918853667] [2023-11-21 21:02:49,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:02:49,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:02:49,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:02:49,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:02:49,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:02:49,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918853667] [2023-11-21 21:02:49,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918853667] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:02:49,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:02:49,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 21:02:49,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190256530] [2023-11-21 21:02:49,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:02:49,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 21:02:49,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:02:49,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 21:02:49,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 21:02:49,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 144 [2023-11-21 21:02:49,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 128 transitions, 312 flow. Second operand has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:02:49,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:02:49,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 144 [2023-11-21 21:02:49,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:02:51,076 INFO L124 PetriNetUnfolderBase]: 4084/9814 cut-off events. [2023-11-21 21:02:51,076 INFO L125 PetriNetUnfolderBase]: For 1605/1605 co-relation queries the response was YES. [2023-11-21 21:02:51,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17706 conditions, 9814 events. 4084/9814 cut-off events. For 1605/1605 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 85978 event pairs, 3767 based on Foata normal form. 1/8413 useless extension candidates. Maximal degree in co-relation 17672. Up to 6645 conditions per place. [2023-11-21 21:02:51,160 INFO L140 encePairwiseOnDemand]: 141/144 looper letters, 64 selfloop transitions, 2 changer transitions 0/130 dead transitions. [2023-11-21 21:02:51,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 130 transitions, 448 flow [2023-11-21 21:02:51,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:02:51,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 21:02:51,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2023-11-21 21:02:51,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6226851851851852 [2023-11-21 21:02:51,163 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 269 transitions. [2023-11-21 21:02:51,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 269 transitions. [2023-11-21 21:02:51,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:02:51,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 269 transitions. [2023-11-21 21:02:51,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:02:51,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:02:51,167 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:02:51,167 INFO L175 Difference]: Start difference. First operand has 131 places, 128 transitions, 312 flow. Second operand 3 states and 269 transitions. [2023-11-21 21:02:51,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 130 transitions, 448 flow [2023-11-21 21:02:51,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 130 transitions, 446 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 21:02:51,177 INFO L231 Difference]: Finished difference. Result has 133 places, 128 transitions, 318 flow [2023-11-21 21:02:51,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=318, PETRI_PLACES=133, PETRI_TRANSITIONS=128} [2023-11-21 21:02:51,179 INFO L281 CegarLoopForPetriNet]: 129 programPoint places, 4 predicate places. [2023-11-21 21:02:51,179 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 128 transitions, 318 flow [2023-11-21 21:02:51,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:02:51,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:02:51,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 21:02:51,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 21:02:51,180 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-21 21:02:51,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:02:51,181 INFO L85 PathProgramCache]: Analyzing trace with hash 853026933, now seen corresponding path program 1 times [2023-11-21 21:02:51,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:02:51,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915680477] [2023-11-21 21:02:51,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:02:51,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:02:51,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:02:51,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:02:51,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:02:51,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915680477] [2023-11-21 21:02:51,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915680477] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:02:51,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26428900] [2023-11-21 21:02:51,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:02:51,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:02:51,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f943e5-851f-4e59-b27b-7976e1501658/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:02:51,270 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f943e5-851f-4e59-b27b-7976e1501658/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:02:51,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f943e5-851f-4e59-b27b-7976e1501658/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 21:02:51,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:02:51,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 21:02:51,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:02:51,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:02:51,463 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 21:02:51,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:02:51,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26428900] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 21:02:51,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 21:02:51,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-21 21:02:51,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304205467] [2023-11-21 21:02:51,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 21:02:51,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 21:02:51,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:02:51,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 21:02:51,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-21 21:02:51,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 144 [2023-11-21 21:02:51,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 128 transitions, 318 flow. Second operand has 7 states, 7 states have (on average 74.14285714285714) internal successors, (519), 7 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:02:51,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:02:51,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 144 [2023-11-21 21:02:51,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:02:52,986 INFO L124 PetriNetUnfolderBase]: 3973/9594 cut-off events. [2023-11-21 21:02:52,986 INFO L125 PetriNetUnfolderBase]: For 943/1001 co-relation queries the response was YES. [2023-11-21 21:02:53,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17169 conditions, 9594 events. 3973/9594 cut-off events. For 943/1001 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 83764 event pairs, 3660 based on Foata normal form. 3/8209 useless extension candidates. Maximal degree in co-relation 17144. Up to 6451 conditions per place. [2023-11-21 21:02:53,069 INFO L140 encePairwiseOnDemand]: 140/144 looper letters, 64 selfloop transitions, 6 changer transitions 0/137 dead transitions. [2023-11-21 21:02:53,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 137 transitions, 480 flow [2023-11-21 21:02:53,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 21:02:53,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-21 21:02:53,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 503 transitions. [2023-11-21 21:02:53,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821759259259259 [2023-11-21 21:02:53,077 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 503 transitions. [2023-11-21 21:02:53,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 503 transitions. [2023-11-21 21:02:53,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:02:53,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 503 transitions. [2023-11-21 21:02:53,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 83.83333333333333) internal successors, (503), 6 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:02:53,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:02:53,085 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:02:53,085 INFO L175 Difference]: Start difference. First operand has 133 places, 128 transitions, 318 flow. Second operand 6 states and 503 transitions. [2023-11-21 21:02:53,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 137 transitions, 480 flow [2023-11-21 21:02:53,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 137 transitions, 476 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 21:02:53,095 INFO L231 Difference]: Finished difference. Result has 140 places, 131 transitions, 354 flow [2023-11-21 21:02:53,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=354, PETRI_PLACES=140, PETRI_TRANSITIONS=131} [2023-11-21 21:02:53,100 INFO L281 CegarLoopForPetriNet]: 129 programPoint places, 11 predicate places. [2023-11-21 21:02:53,100 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 131 transitions, 354 flow [2023-11-21 21:02:53,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 74.14285714285714) internal successors, (519), 7 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:02:53,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:02:53,101 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1] [2023-11-21 21:02:53,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f943e5-851f-4e59-b27b-7976e1501658/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 21:02:53,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f943e5-851f-4e59-b27b-7976e1501658/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-21 21:02:53,323 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-21 21:02:53,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:02:53,323 INFO L85 PathProgramCache]: Analyzing trace with hash 673962112, now seen corresponding path program 1 times [2023-11-21 21:02:53,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:02:53,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622276288] [2023-11-21 21:02:53,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:02:53,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:02:53,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:02:53,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:02:53,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:02:53,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622276288] [2023-11-21 21:02:53,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622276288] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:02:53,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601830387] [2023-11-21 21:02:53,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:02:53,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:02:53,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f943e5-851f-4e59-b27b-7976e1501658/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:02:53,833 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f943e5-851f-4e59-b27b-7976e1501658/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:02:53,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f943e5-851f-4e59-b27b-7976e1501658/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 21:02:53,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:02:53,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-21 21:02:53,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:02:54,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:54,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-21 21:02:54,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:02:54,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-21 21:02:54,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:02:54,255 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 21:02:54,486 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 21:02:54,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2023-11-21 21:02:54,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:02:54,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601830387] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 21:02:54,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 21:02:54,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2023-11-21 21:02:54,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501181230] [2023-11-21 21:02:54,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 21:02:54,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-21 21:02:54,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:02:54,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-21 21:02:54,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-11-21 21:02:57,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 144 [2023-11-21 21:02:57,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 131 transitions, 354 flow. Second operand has 14 states, 14 states have (on average 69.5) internal successors, (973), 14 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:02:57,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:02:57,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 144 [2023-11-21 21:02:57,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:02:59,511 INFO L124 PetriNetUnfolderBase]: 4084/9826 cut-off events. [2023-11-21 21:02:59,511 INFO L125 PetriNetUnfolderBase]: For 1099/1099 co-relation queries the response was YES. [2023-11-21 21:02:59,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17756 conditions, 9826 events. 4084/9826 cut-off events. For 1099/1099 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 85904 event pairs, 3767 based on Foata normal form. 3/8427 useless extension candidates. Maximal degree in co-relation 17723. Up to 6645 conditions per place. [2023-11-21 21:02:59,615 INFO L140 encePairwiseOnDemand]: 140/144 looper letters, 69 selfloop transitions, 6 changer transitions 0/139 dead transitions. [2023-11-21 21:02:59,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 139 transitions, 532 flow [2023-11-21 21:02:59,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 21:02:59,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-21 21:02:59,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 552 transitions. [2023-11-21 21:02:59,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2023-11-21 21:02:59,621 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 552 transitions. [2023-11-21 21:02:59,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 552 transitions. [2023-11-21 21:02:59,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:02:59,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 552 transitions. [2023-11-21 21:02:59,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 78.85714285714286) internal successors, (552), 7 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:02:59,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 144.0) internal successors, (1152), 8 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:02:59,630 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 144.0) internal successors, (1152), 8 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:02:59,630 INFO L175 Difference]: Start difference. First operand has 140 places, 131 transitions, 354 flow. Second operand 7 states and 552 transitions. [2023-11-21 21:02:59,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 139 transitions, 532 flow [2023-11-21 21:02:59,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 139 transitions, 522 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-11-21 21:02:59,640 INFO L231 Difference]: Finished difference. Result has 149 places, 133 transitions, 386 flow [2023-11-21 21:02:59,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=386, PETRI_PLACES=149, PETRI_TRANSITIONS=133} [2023-11-21 21:02:59,642 INFO L281 CegarLoopForPetriNet]: 129 programPoint places, 20 predicate places. [2023-11-21 21:02:59,642 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 133 transitions, 386 flow [2023-11-21 21:02:59,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 69.5) internal successors, (973), 14 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:02:59,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:02:59,644 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1] [2023-11-21 21:02:59,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f943e5-851f-4e59-b27b-7976e1501658/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 21:02:59,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f943e5-851f-4e59-b27b-7976e1501658/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-21 21:02:59,869 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-21 21:02:59,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:02:59,870 INFO L85 PathProgramCache]: Analyzing trace with hash 2021777344, now seen corresponding path program 2 times [2023-11-21 21:02:59,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:02:59,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141843842] [2023-11-21 21:02:59,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:02:59,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:03:00,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:03:00,192 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-21 21:03:00,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:03:00,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141843842] [2023-11-21 21:03:00,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141843842] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 21:03:00,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 21:03:00,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 21:03:00,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091846956] [2023-11-21 21:03:00,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 21:03:00,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 21:03:00,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:03:00,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 21:03:00,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 21:03:00,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 144 [2023-11-21 21:03:00,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 133 transitions, 386 flow. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:00,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:03:00,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 144 [2023-11-21 21:03:00,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:03:01,992 INFO L124 PetriNetUnfolderBase]: 4432/10479 cut-off events. [2023-11-21 21:03:01,993 INFO L125 PetriNetUnfolderBase]: For 925/925 co-relation queries the response was YES. [2023-11-21 21:03:02,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18950 conditions, 10479 events. 4432/10479 cut-off events. For 925/925 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 93869 event pairs, 2895 based on Foata normal form. 0/8972 useless extension candidates. Maximal degree in co-relation 18907. Up to 4460 conditions per place. [2023-11-21 21:03:02,078 INFO L140 encePairwiseOnDemand]: 140/144 looper letters, 102 selfloop transitions, 2 changer transitions 0/167 dead transitions. [2023-11-21 21:03:02,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 167 transitions, 666 flow [2023-11-21 21:03:02,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 21:03:02,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 21:03:02,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 302 transitions. [2023-11-21 21:03:02,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6990740740740741 [2023-11-21 21:03:02,081 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 302 transitions. [2023-11-21 21:03:02,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 302 transitions. [2023-11-21 21:03:02,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:03:02,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 302 transitions. [2023-11-21 21:03:02,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:02,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:02,085 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:02,086 INFO L175 Difference]: Start difference. First operand has 149 places, 133 transitions, 386 flow. Second operand 3 states and 302 transitions. [2023-11-21 21:03:02,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 167 transitions, 666 flow [2023-11-21 21:03:02,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 167 transitions, 656 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-11-21 21:03:02,108 INFO L231 Difference]: Finished difference. Result has 145 places, 131 transitions, 376 flow [2023-11-21 21:03:02,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=376, PETRI_PLACES=145, PETRI_TRANSITIONS=131} [2023-11-21 21:03:02,112 INFO L281 CegarLoopForPetriNet]: 129 programPoint places, 16 predicate places. [2023-11-21 21:03:02,113 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 131 transitions, 376 flow [2023-11-21 21:03:02,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:02,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:03:02,114 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1] [2023-11-21 21:03:02,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-21 21:03:02,114 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-21 21:03:02,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:03:02,115 INFO L85 PathProgramCache]: Analyzing trace with hash 2021777345, now seen corresponding path program 1 times [2023-11-21 21:03:02,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:03:02,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366437629] [2023-11-21 21:03:02,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:03:02,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:03:02,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:03:02,310 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:03:02,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:03:02,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366437629] [2023-11-21 21:03:02,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366437629] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:03:02,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676334389] [2023-11-21 21:03:02,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:03:02,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:03:02,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f943e5-851f-4e59-b27b-7976e1501658/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:03:02,312 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f943e5-851f-4e59-b27b-7976e1501658/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:03:02,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f943e5-851f-4e59-b27b-7976e1501658/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 21:03:02,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:03:02,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-21 21:03:02,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:03:02,543 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:03:02,543 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 21:03:02,630 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:03:02,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676334389] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 21:03:02,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 21:03:02,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-21 21:03:02,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61156339] [2023-11-21 21:03:02,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 21:03:02,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-21 21:03:02,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:03:02,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-21 21:03:02,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-21 21:03:02,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 144 [2023-11-21 21:03:02,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 131 transitions, 376 flow. Second operand has 13 states, 13 states have (on average 74.53846153846153) internal successors, (969), 13 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:02,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:03:02,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 144 [2023-11-21 21:03:02,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 21:03:04,692 INFO L124 PetriNetUnfolderBase]: 3973/9609 cut-off events. [2023-11-21 21:03:04,692 INFO L125 PetriNetUnfolderBase]: For 1575/1633 co-relation queries the response was YES. [2023-11-21 21:03:04,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17552 conditions, 9609 events. 3973/9609 cut-off events. For 1575/1633 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 83701 event pairs, 3660 based on Foata normal form. 6/8239 useless extension candidates. Maximal degree in co-relation 17488. Up to 6451 conditions per place. [2023-11-21 21:03:04,766 INFO L140 encePairwiseOnDemand]: 140/144 looper letters, 76 selfloop transitions, 12 changer transitions 0/153 dead transitions. [2023-11-21 21:03:04,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 153 transitions, 658 flow [2023-11-21 21:03:04,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-21 21:03:04,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-21 21:03:04,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 956 transitions. [2023-11-21 21:03:04,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5532407407407407 [2023-11-21 21:03:04,772 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 956 transitions. [2023-11-21 21:03:04,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 956 transitions. [2023-11-21 21:03:04,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 21:03:04,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 956 transitions. [2023-11-21 21:03:04,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 79.66666666666667) internal successors, (956), 12 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:04,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 144.0) internal successors, (1872), 13 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:04,784 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 144.0) internal successors, (1872), 13 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:04,784 INFO L175 Difference]: Start difference. First operand has 145 places, 131 transitions, 376 flow. Second operand 12 states and 956 transitions. [2023-11-21 21:03:04,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 153 transitions, 658 flow [2023-11-21 21:03:04,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 153 transitions, 654 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 21:03:04,795 INFO L231 Difference]: Finished difference. Result has 161 places, 137 transitions, 472 flow [2023-11-21 21:03:04,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=472, PETRI_PLACES=161, PETRI_TRANSITIONS=137} [2023-11-21 21:03:04,796 INFO L281 CegarLoopForPetriNet]: 129 programPoint places, 32 predicate places. [2023-11-21 21:03:04,796 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 137 transitions, 472 flow [2023-11-21 21:03:04,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 74.53846153846153) internal successors, (969), 13 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:04,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 21:03:04,798 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 1, 1] [2023-11-21 21:03:04,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f943e5-851f-4e59-b27b-7976e1501658/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 21:03:05,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f943e5-851f-4e59-b27b-7976e1501658/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:03:05,020 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2023-11-21 21:03:05,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 21:03:05,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1749480811, now seen corresponding path program 2 times [2023-11-21 21:03:05,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 21:03:05,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866743244] [2023-11-21 21:03:05,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 21:03:05,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 21:03:05,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 21:03:06,136 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:03:06,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 21:03:06,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866743244] [2023-11-21 21:03:06,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866743244] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 21:03:06,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560876508] [2023-11-21 21:03:06,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 21:03:06,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 21:03:06,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f943e5-851f-4e59-b27b-7976e1501658/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 21:03:06,138 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f943e5-851f-4e59-b27b-7976e1501658/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 21:03:06,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99f943e5-851f-4e59-b27b-7976e1501658/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 21:03:06,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 21:03:06,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 21:03:06,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-21 21:03:06,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 21:03:06,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:03:06,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-21 21:03:06,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:03:06,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-21 21:03:06,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:03:06,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-21 21:03:06,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:03:06,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-21 21:03:06,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 21:03:06,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-21 21:03:06,965 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:03:06,966 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 21:03:07,104 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 21:03:07,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2023-11-21 21:03:07,371 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 21:03:07,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 67 [2023-11-21 21:03:07,826 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 21:03:07,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 73 [2023-11-21 21:03:08,409 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 21:03:08,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 79 [2023-11-21 21:03:09,203 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 21:03:09,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560876508] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 21:03:09,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 21:03:09,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 29 [2023-11-21 21:03:09,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752467276] [2023-11-21 21:03:09,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 21:03:09,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-21 21:03:09,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 21:03:09,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-21 21:03:09,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=725, Unknown=0, NotChecked=0, Total=930 [2023-11-21 21:03:23,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 144 [2023-11-21 21:03:23,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 137 transitions, 472 flow. Second operand has 31 states, 31 states have (on average 69.54838709677419) internal successors, (2156), 31 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 21:03:23,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 21:03:23,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 144 [2023-11-21 21:03:23,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand