./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/stack-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd23273f-09a1-46b9-9188-3ade9e32ea2b/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd23273f-09a1-46b9-9188-3ade9e32ea2b/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_fd23273f-09a1-46b9-9188-3ade9e32ea2b/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd23273f-09a1-46b9-9188-3ade9e32ea2b/bin/uautomizer-verify-bycVGegfSx/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/stack-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd23273f-09a1-46b9-9188-3ade9e32ea2b/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_fd23273f-09a1-46b9-9188-3ade9e32ea2b/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 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:05:49,773 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:05:49,894 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd23273f-09a1-46b9-9188-3ade9e32ea2b/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-21 22:05:49,901 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:05:49,902 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:05:49,935 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:05:49,936 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:05:49,936 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:05:49,937 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:05:49,938 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:05:49,939 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:05:49,940 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:05:49,940 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:05:49,941 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:05:49,942 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:05:49,942 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:05:49,943 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:05:49,944 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:05:49,944 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 22:05:49,945 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 22:05:49,946 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 22:05:49,946 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:05:49,947 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 22:05:49,948 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 22:05:49,948 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:05:49,949 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:05:49,950 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:05:49,950 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:05:49,951 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:05:49,952 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:05:49,952 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:05:49,953 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:05:49,954 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:05:49,954 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:05:49,955 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:05:49,956 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:05:49,956 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:05:49,957 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:05:49,957 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:05:49,958 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_fd23273f-09a1-46b9-9188-3ade9e32ea2b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd23273f-09a1-46b9-9188-3ade9e32ea2b/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c5d098180a5596f0a60d3177354c69a5ee6da68b8191dc75b6c33b291ef0421 [2023-11-21 22:05:50,335 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:05:50,380 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:05:50,384 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:05:50,387 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:05:50,388 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:05:50,390 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd23273f-09a1-46b9-9188-3ade9e32ea2b/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/pthread/stack-2.i [2023-11-21 22:05:53,756 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:05:54,086 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:05:54,087 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd23273f-09a1-46b9-9188-3ade9e32ea2b/sv-benchmarks/c/pthread/stack-2.i [2023-11-21 22:05:54,114 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd23273f-09a1-46b9-9188-3ade9e32ea2b/bin/uautomizer-verify-bycVGegfSx/data/344f73dcf/0939798914f34109b8eb8954bda52de9/FLAGef4af4e0d [2023-11-21 22:05:54,138 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd23273f-09a1-46b9-9188-3ade9e32ea2b/bin/uautomizer-verify-bycVGegfSx/data/344f73dcf/0939798914f34109b8eb8954bda52de9 [2023-11-21 22:05:54,141 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:05:54,143 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:05:54,144 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:05:54,145 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:05:54,150 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:05:54,151 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:05:54" (1/1) ... [2023-11-21 22:05:54,153 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fd66980 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:54, skipping insertion in model container [2023-11-21 22:05:54,153 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:05:54" (1/1) ... [2023-11-21 22:05:54,236 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:05:54,781 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:05:54,800 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:05:54,858 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:05:54,959 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:05:54,959 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:54 WrapperNode [2023-11-21 22:05:54,960 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:05:54,961 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:05:54,961 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:05:54,961 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:05:54,969 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:54" (1/1) ... [2023-11-21 22:05:55,013 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:54" (1/1) ... [2023-11-21 22:05:55,050 INFO L138 Inliner]: procedures = 278, calls = 47, calls flagged for inlining = 13, calls inlined = 14, statements flattened = 171 [2023-11-21 22:05:55,053 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:05:55,054 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:05:55,054 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:05:55,054 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:05:55,064 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:54" (1/1) ... [2023-11-21 22:05:55,064 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:54" (1/1) ... [2023-11-21 22:05:55,089 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:54" (1/1) ... [2023-11-21 22:05:55,089 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:54" (1/1) ... [2023-11-21 22:05:55,097 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:54" (1/1) ... [2023-11-21 22:05:55,113 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:54" (1/1) ... [2023-11-21 22:05:55,115 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:54" (1/1) ... [2023-11-21 22:05:55,117 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:54" (1/1) ... [2023-11-21 22:05:55,121 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:05:55,135 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:05:55,135 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:05:55,135 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:05:55,136 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:54" (1/1) ... [2023-11-21 22:05:55,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:05:55,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd23273f-09a1-46b9-9188-3ade9e32ea2b/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:05:55,171 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd23273f-09a1-46b9-9188-3ade9e32ea2b/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:05:55,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd23273f-09a1-46b9-9188-3ade9e32ea2b/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:05:55,212 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-21 22:05:55,213 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-21 22:05:55,214 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-21 22:05:55,214 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-21 22:05:55,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 22:05:55,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 22:05:55,214 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-21 22:05:55,215 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 22:05:55,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 22:05:55,216 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-21 22:05:55,216 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:05:55,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 22:05:55,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:05:55,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:05:55,218 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 22:05:55,370 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:05:55,373 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:05:55,709 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:05:55,995 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:05:55,996 INFO L308 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-21 22:05:55,997 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:05:55 BoogieIcfgContainer [2023-11-21 22:05:55,998 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:05:56,002 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:05:56,002 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:05:56,005 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:05:56,005 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:05:54" (1/3) ... [2023-11-21 22:05:56,006 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70c8ad15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:05:56, skipping insertion in model container [2023-11-21 22:05:56,006 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:05:54" (2/3) ... [2023-11-21 22:05:56,006 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70c8ad15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:05:56, skipping insertion in model container [2023-11-21 22:05:56,007 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:05:55" (3/3) ... [2023-11-21 22:05:56,008 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-2.i [2023-11-21 22:05:56,024 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:05:56,024 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-11-21 22:05:56,024 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-21 22:05:56,102 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-21 22:05:56,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 68 transitions, 150 flow [2023-11-21 22:05:56,205 INFO L124 PetriNetUnfolderBase]: 9/66 cut-off events. [2023-11-21 22:05:56,205 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-21 22:05:56,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 66 events. 9/66 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 172 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 54. Up to 3 conditions per place. [2023-11-21 22:05:56,213 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 68 transitions, 150 flow [2023-11-21 22:05:56,221 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 65 transitions, 142 flow [2023-11-21 22:05:56,238 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:05:56,251 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;@16aad2b6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:05:56,252 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2023-11-21 22:05:56,256 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-21 22:05:56,259 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-11-21 22:05:56,260 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-21 22:05:56,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:05:56,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-21 22:05:56,261 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:05:56,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:56,271 INFO L85 PathProgramCache]: Analyzing trace with hash 14663, now seen corresponding path program 1 times [2023-11-21 22:05:56,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:56,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754700026] [2023-11-21 22:05:56,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:56,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:56,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:56,733 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 22:05:56,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:56,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754700026] [2023-11-21 22:05:56,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754700026] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:05:56,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:05:56,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:05:56,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361671102] [2023-11-21 22:05:56,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:05:56,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:05:56,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:56,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:05:56,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:05:56,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 68 [2023-11-21 22:05:56,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 22:05:56,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:05:56,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 68 [2023-11-21 22:05:56,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:05:57,199 INFO L124 PetriNetUnfolderBase]: 731/1422 cut-off events. [2023-11-21 22:05:57,199 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2023-11-21 22:05:57,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2588 conditions, 1422 events. 731/1422 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8204 event pairs, 559 based on Foata normal form. 138/1328 useless extension candidates. Maximal degree in co-relation 2482. Up to 1125 conditions per place. [2023-11-21 22:05:57,221 INFO L140 encePairwiseOnDemand]: 60/68 looper letters, 32 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2023-11-21 22:05:57,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 57 transitions, 194 flow [2023-11-21 22:05:57,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:05:57,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:05:57,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 115 transitions. [2023-11-21 22:05:57,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5637254901960784 [2023-11-21 22:05:57,238 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 115 transitions. [2023-11-21 22:05:57,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 115 transitions. [2023-11-21 22:05:57,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:05:57,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 115 transitions. [2023-11-21 22:05:57,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states 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 22:05:57,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states 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 22:05:57,252 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states 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 22:05:57,254 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 142 flow. Second operand 3 states and 115 transitions. [2023-11-21 22:05:57,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 57 transitions, 194 flow [2023-11-21 22:05:57,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 57 transitions, 186 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-21 22:05:57,267 INFO L231 Difference]: Finished difference. Result has 57 places, 57 transitions, 122 flow [2023-11-21 22:05:57,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=57, PETRI_TRANSITIONS=57} [2023-11-21 22:05:57,274 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -6 predicate places. [2023-11-21 22:05:57,275 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 57 transitions, 122 flow [2023-11-21 22:05:57,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states 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 22:05:57,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:05:57,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-21 22:05:57,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 22:05:57,276 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:05:57,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:57,277 INFO L85 PathProgramCache]: Analyzing trace with hash 14664, now seen corresponding path program 1 times [2023-11-21 22:05:57,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:57,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840165157] [2023-11-21 22:05:57,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:57,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:57,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:57,510 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 22:05:57,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:57,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840165157] [2023-11-21 22:05:57,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840165157] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:05:57,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:05:57,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:05:57,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024153812] [2023-11-21 22:05:57,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:05:57,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:05:57,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:57,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:05:57,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:05:57,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 68 [2023-11-21 22:05:57,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 57 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states 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 22:05:57,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:05:57,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 68 [2023-11-21 22:05:57,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:05:57,709 INFO L124 PetriNetUnfolderBase]: 456/959 cut-off events. [2023-11-21 22:05:57,709 INFO L125 PetriNetUnfolderBase]: For 12/13 co-relation queries the response was YES. [2023-11-21 22:05:57,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1705 conditions, 959 events. 456/959 cut-off events. For 12/13 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5420 event pairs, 339 based on Foata normal form. 122/910 useless extension candidates. Maximal degree in co-relation 1695. Up to 728 conditions per place. [2023-11-21 22:05:57,719 INFO L140 encePairwiseOnDemand]: 64/68 looper letters, 30 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-11-21 22:05:57,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 55 transitions, 182 flow [2023-11-21 22:05:57,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:05:57,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:05:57,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 115 transitions. [2023-11-21 22:05:57,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5637254901960784 [2023-11-21 22:05:57,724 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 115 transitions. [2023-11-21 22:05:57,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 115 transitions. [2023-11-21 22:05:57,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:05:57,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 115 transitions. [2023-11-21 22:05:57,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states 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 22:05:57,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states 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 22:05:57,730 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states 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 22:05:57,730 INFO L175 Difference]: Start difference. First operand has 57 places, 57 transitions, 122 flow. Second operand 3 states and 115 transitions. [2023-11-21 22:05:57,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 55 transitions, 182 flow [2023-11-21 22:05:57,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 55 transitions, 178 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:05:57,734 INFO L231 Difference]: Finished difference. Result has 55 places, 55 transitions, 118 flow [2023-11-21 22:05:57,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=55, PETRI_TRANSITIONS=55} [2023-11-21 22:05:57,737 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -8 predicate places. [2023-11-21 22:05:57,737 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 55 transitions, 118 flow [2023-11-21 22:05:57,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states 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 22:05:57,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:05:57,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-21 22:05:57,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 22:05:57,739 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:05:57,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:57,743 INFO L85 PathProgramCache]: Analyzing trace with hash 437302102, now seen corresponding path program 1 times [2023-11-21 22:05:57,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:57,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136469787] [2023-11-21 22:05:57,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:57,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:57,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:57,823 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 22:05:57,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:57,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136469787] [2023-11-21 22:05:57,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136469787] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:05:57,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:05:57,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:05:57,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119258215] [2023-11-21 22:05:57,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:05:57,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:05:57,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:57,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:05:57,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:05:57,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 68 [2023-11-21 22:05:57,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 55 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states 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 22:05:57,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:05:57,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 68 [2023-11-21 22:05:57,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:05:58,073 INFO L124 PetriNetUnfolderBase]: 481/999 cut-off events. [2023-11-21 22:05:58,073 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-11-21 22:05:58,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1792 conditions, 999 events. 481/999 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 5610 event pairs, 359 based on Foata normal form. 0/838 useless extension candidates. Maximal degree in co-relation 1782. Up to 775 conditions per place. [2023-11-21 22:05:58,082 INFO L140 encePairwiseOnDemand]: 64/68 looper letters, 32 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2023-11-21 22:05:58,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 53 transitions, 182 flow [2023-11-21 22:05:58,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:05:58,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:05:58,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 111 transitions. [2023-11-21 22:05:58,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5441176470588235 [2023-11-21 22:05:58,084 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 111 transitions. [2023-11-21 22:05:58,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 111 transitions. [2023-11-21 22:05:58,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:05:58,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 111 transitions. [2023-11-21 22:05:58,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states 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 22:05:58,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states 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 22:05:58,087 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states 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 22:05:58,088 INFO L175 Difference]: Start difference. First operand has 55 places, 55 transitions, 118 flow. Second operand 3 states and 111 transitions. [2023-11-21 22:05:58,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 53 transitions, 182 flow [2023-11-21 22:05:58,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 53 transitions, 178 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:05:58,091 INFO L231 Difference]: Finished difference. Result has 53 places, 53 transitions, 114 flow [2023-11-21 22:05:58,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=53, PETRI_TRANSITIONS=53} [2023-11-21 22:05:58,092 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -10 predicate places. [2023-11-21 22:05:58,092 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 53 transitions, 114 flow [2023-11-21 22:05:58,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states 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 22:05:58,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:05:58,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-21 22:05:58,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 22:05:58,093 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:05:58,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:58,094 INFO L85 PathProgramCache]: Analyzing trace with hash 437302103, now seen corresponding path program 1 times [2023-11-21 22:05:58,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:58,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740068784] [2023-11-21 22:05:58,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:58,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:58,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:58,188 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 22:05:58,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:58,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740068784] [2023-11-21 22:05:58,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740068784] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:05:58,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:05:58,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:05:58,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292059996] [2023-11-21 22:05:58,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:05:58,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:05:58,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:58,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:05:58,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:05:58,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 68 [2023-11-21 22:05:58,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 53 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states 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 22:05:58,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:05:58,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 68 [2023-11-21 22:05:58,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:05:58,372 INFO L124 PetriNetUnfolderBase]: 456/943 cut-off events. [2023-11-21 22:05:58,372 INFO L125 PetriNetUnfolderBase]: For 12/13 co-relation queries the response was YES. [2023-11-21 22:05:58,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1689 conditions, 943 events. 456/943 cut-off events. For 12/13 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5246 event pairs, 339 based on Foata normal form. 21/809 useless extension candidates. Maximal degree in co-relation 1679. Up to 728 conditions per place. [2023-11-21 22:05:58,381 INFO L140 encePairwiseOnDemand]: 64/68 looper letters, 30 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2023-11-21 22:05:58,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 51 transitions, 174 flow [2023-11-21 22:05:58,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:05:58,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:05:58,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 115 transitions. [2023-11-21 22:05:58,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5637254901960784 [2023-11-21 22:05:58,383 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 115 transitions. [2023-11-21 22:05:58,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 115 transitions. [2023-11-21 22:05:58,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:05:58,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 115 transitions. [2023-11-21 22:05:58,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states 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 22:05:58,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states 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 22:05:58,386 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states 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 22:05:58,386 INFO L175 Difference]: Start difference. First operand has 53 places, 53 transitions, 114 flow. Second operand 3 states and 115 transitions. [2023-11-21 22:05:58,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 51 transitions, 174 flow [2023-11-21 22:05:58,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 51 transitions, 170 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:05:58,388 INFO L231 Difference]: Finished difference. Result has 51 places, 51 transitions, 110 flow [2023-11-21 22:05:58,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=51, PETRI_TRANSITIONS=51} [2023-11-21 22:05:58,390 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -12 predicate places. [2023-11-21 22:05:58,390 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 51 transitions, 110 flow [2023-11-21 22:05:58,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states 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 22:05:58,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:05:58,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:58,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 22:05:58,391 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:05:58,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:58,392 INFO L85 PathProgramCache]: Analyzing trace with hash -956668577, now seen corresponding path program 1 times [2023-11-21 22:05:58,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:58,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785405704] [2023-11-21 22:05:58,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:58,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:58,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:58,631 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 22:05:58,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:58,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785405704] [2023-11-21 22:05:58,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785405704] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:05:58,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:05:58,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:05:58,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736971671] [2023-11-21 22:05:58,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:05:58,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:05:58,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:58,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:05:58,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:05:58,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 68 [2023-11-21 22:05:58,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 51 transitions, 110 flow. Second operand has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 22:05:58,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:05:58,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 68 [2023-11-21 22:05:58,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:05:58,957 INFO L124 PetriNetUnfolderBase]: 731/1352 cut-off events. [2023-11-21 22:05:58,957 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-21 22:05:58,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2495 conditions, 1352 events. 731/1352 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7511 event pairs, 399 based on Foata normal form. 0/1159 useless extension candidates. Maximal degree in co-relation 2485. Up to 797 conditions per place. [2023-11-21 22:05:58,967 INFO L140 encePairwiseOnDemand]: 63/68 looper letters, 46 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2023-11-21 22:05:58,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 66 transitions, 241 flow [2023-11-21 22:05:58,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:05:58,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-21 22:05:58,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 155 transitions. [2023-11-21 22:05:58,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5698529411764706 [2023-11-21 22:05:58,969 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 155 transitions. [2023-11-21 22:05:58,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 155 transitions. [2023-11-21 22:05:58,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:05:58,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 155 transitions. [2023-11-21 22:05:58,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 38.75) internal successors, (155), 4 states have internal predecessors, (155), 0 states have call successors, (0), 0 states 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 22:05:58,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 68.0) internal successors, (340), 5 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:58,973 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 68.0) internal successors, (340), 5 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:05:58,973 INFO L175 Difference]: Start difference. First operand has 51 places, 51 transitions, 110 flow. Second operand 4 states and 155 transitions. [2023-11-21 22:05:58,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 66 transitions, 241 flow [2023-11-21 22:05:58,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 66 transitions, 237 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-21 22:05:58,978 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 112 flow [2023-11-21 22:05:58,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2023-11-21 22:05:58,980 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -12 predicate places. [2023-11-21 22:05:58,981 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 112 flow [2023-11-21 22:05:58,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 0 states have call successors, (0), 0 states 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 22:05:58,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:05:58,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:58,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 22:05:58,981 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:05:58,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:58,983 INFO L85 PathProgramCache]: Analyzing trace with hash -956668576, now seen corresponding path program 1 times [2023-11-21 22:05:58,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:58,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792762736] [2023-11-21 22:05:58,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:58,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:59,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:05:59,366 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 22:05:59,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:05:59,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792762736] [2023-11-21 22:05:59,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792762736] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:05:59,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:05:59,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:05:59,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154710929] [2023-11-21 22:05:59,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:05:59,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 22:05:59,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:05:59,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 22:05:59,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:05:59,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 68 [2023-11-21 22:05:59,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 112 flow. Second operand has 6 states, 6 states have (on average 29.333333333333332) internal successors, (176), 6 states have internal predecessors, (176), 0 states have call successors, (0), 0 states 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 22:05:59,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:05:59,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 68 [2023-11-21 22:05:59,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:05:59,936 INFO L124 PetriNetUnfolderBase]: 755/1431 cut-off events. [2023-11-21 22:05:59,936 INFO L125 PetriNetUnfolderBase]: For 51/52 co-relation queries the response was YES. [2023-11-21 22:05:59,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2733 conditions, 1431 events. 755/1431 cut-off events. For 51/52 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8068 event pairs, 125 based on Foata normal form. 0/1250 useless extension candidates. Maximal degree in co-relation 842. Up to 849 conditions per place. [2023-11-21 22:05:59,949 INFO L140 encePairwiseOnDemand]: 60/68 looper letters, 88 selfloop transitions, 9 changer transitions 0/114 dead transitions. [2023-11-21 22:05:59,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 114 transitions, 443 flow [2023-11-21 22:05:59,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 22:05:59,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-21 22:05:59,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 296 transitions. [2023-11-21 22:05:59,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6218487394957983 [2023-11-21 22:05:59,952 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 296 transitions. [2023-11-21 22:05:59,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 296 transitions. [2023-11-21 22:05:59,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:05:59,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 296 transitions. [2023-11-21 22:05:59,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 42.285714285714285) internal successors, (296), 7 states have internal predecessors, (296), 0 states have call successors, (0), 0 states 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 22:05:59,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 68.0) internal successors, (544), 8 states have internal predecessors, (544), 0 states have call successors, (0), 0 states 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 22:05:59,957 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 68.0) internal successors, (544), 8 states have internal predecessors, (544), 0 states have call successors, (0), 0 states 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 22:05:59,957 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 112 flow. Second operand 7 states and 296 transitions. [2023-11-21 22:05:59,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 114 transitions, 443 flow [2023-11-21 22:05:59,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 114 transitions, 431 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-21 22:05:59,962 INFO L231 Difference]: Finished difference. Result has 58 places, 59 transitions, 170 flow [2023-11-21 22:05:59,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=170, PETRI_PLACES=58, PETRI_TRANSITIONS=59} [2023-11-21 22:05:59,963 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -5 predicate places. [2023-11-21 22:05:59,964 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 59 transitions, 170 flow [2023-11-21 22:05:59,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.333333333333332) internal successors, (176), 6 states have internal predecessors, (176), 0 states have call successors, (0), 0 states 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 22:05:59,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:05:59,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:05:59,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 22:05:59,965 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:05:59,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:05:59,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1333253318, now seen corresponding path program 1 times [2023-11-21 22:05:59,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:05:59,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797621351] [2023-11-21 22:05:59,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:05:59,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:05:59,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:00,033 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 22:06:00,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:06:00,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797621351] [2023-11-21 22:06:00,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797621351] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:06:00,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:06:00,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:06:00,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348895720] [2023-11-21 22:06:00,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:06:00,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:06:00,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:06:00,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:06:00,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:06:00,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 68 [2023-11-21 22:06:00,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 59 transitions, 170 flow. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 22:06:00,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:06:00,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 68 [2023-11-21 22:06:00,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:06:00,405 INFO L124 PetriNetUnfolderBase]: 1000/1964 cut-off events. [2023-11-21 22:06:00,405 INFO L125 PetriNetUnfolderBase]: For 255/256 co-relation queries the response was YES. [2023-11-21 22:06:00,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4005 conditions, 1964 events. 1000/1964 cut-off events. For 255/256 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 11803 event pairs, 505 based on Foata normal form. 0/1816 useless extension candidates. Maximal degree in co-relation 3758. Up to 1095 conditions per place. [2023-11-21 22:06:00,449 INFO L140 encePairwiseOnDemand]: 63/68 looper letters, 75 selfloop transitions, 6 changer transitions 0/99 dead transitions. [2023-11-21 22:06:00,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 99 transitions, 424 flow [2023-11-21 22:06:00,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:06:00,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-21 22:06:00,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 189 transitions. [2023-11-21 22:06:00,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6948529411764706 [2023-11-21 22:06:00,452 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 189 transitions. [2023-11-21 22:06:00,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 189 transitions. [2023-11-21 22:06:00,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:06:00,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 189 transitions. [2023-11-21 22:06:00,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 0 states have call successors, (0), 0 states 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 22:06:00,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 68.0) internal successors, (340), 5 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:00,455 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 68.0) internal successors, (340), 5 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:00,455 INFO L175 Difference]: Start difference. First operand has 58 places, 59 transitions, 170 flow. Second operand 4 states and 189 transitions. [2023-11-21 22:06:00,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 99 transitions, 424 flow [2023-11-21 22:06:00,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 99 transitions, 424 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-21 22:06:00,461 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 206 flow [2023-11-21 22:06:00,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=206, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2023-11-21 22:06:00,462 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 0 predicate places. [2023-11-21 22:06:00,463 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 206 flow [2023-11-21 22:06:00,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states 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 22:06:00,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:06:00,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:06:00,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-21 22:06:00,464 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:06:00,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:06:00,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1158148765, now seen corresponding path program 1 times [2023-11-21 22:06:00,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:06:00,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900090531] [2023-11-21 22:06:00,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:00,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:06:00,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:00,535 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 22:06:00,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:06:00,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900090531] [2023-11-21 22:06:00,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900090531] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:06:00,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:06:00,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:06:00,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061196458] [2023-11-21 22:06:00,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:06:00,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:06:00,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:06:00,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:06:00,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:06:00,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 68 [2023-11-21 22:06:00,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 206 flow. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 22:06:00,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:06:00,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 68 [2023-11-21 22:06:00,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:06:00,904 INFO L124 PetriNetUnfolderBase]: 974/1922 cut-off events. [2023-11-21 22:06:00,905 INFO L125 PetriNetUnfolderBase]: For 450/451 co-relation queries the response was YES. [2023-11-21 22:06:00,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4199 conditions, 1922 events. 974/1922 cut-off events. For 450/451 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 10690 event pairs, 209 based on Foata normal form. 49/1832 useless extension candidates. Maximal degree in co-relation 4111. Up to 1204 conditions per place. [2023-11-21 22:06:00,925 INFO L140 encePairwiseOnDemand]: 63/68 looper letters, 75 selfloop transitions, 6 changer transitions 0/99 dead transitions. [2023-11-21 22:06:00,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 99 transitions, 475 flow [2023-11-21 22:06:00,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:06:00,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-21 22:06:00,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 222 transitions. [2023-11-21 22:06:00,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6529411764705882 [2023-11-21 22:06:00,927 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 222 transitions. [2023-11-21 22:06:00,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 222 transitions. [2023-11-21 22:06:00,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:06:00,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 222 transitions. [2023-11-21 22:06:00,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 44.4) internal successors, (222), 5 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:00,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 68.0) internal successors, (408), 6 states have internal predecessors, (408), 0 states have call successors, (0), 0 states 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 22:06:00,930 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 68.0) internal successors, (408), 6 states have internal predecessors, (408), 0 states have call successors, (0), 0 states 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 22:06:00,930 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 206 flow. Second operand 5 states and 222 transitions. [2023-11-21 22:06:00,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 99 transitions, 475 flow [2023-11-21 22:06:00,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 99 transitions, 467 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-21 22:06:00,939 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 210 flow [2023-11-21 22:06:00,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=210, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2023-11-21 22:06:00,940 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 3 predicate places. [2023-11-21 22:06:00,940 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 210 flow [2023-11-21 22:06:00,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 22:06:00,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:06:00,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:06:00,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-21 22:06:00,941 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:06:00,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:06:00,942 INFO L85 PathProgramCache]: Analyzing trace with hash -938021096, now seen corresponding path program 1 times [2023-11-21 22:06:00,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:06:00,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747280669] [2023-11-21 22:06:00,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:00,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:06:00,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:01,004 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 22:06:01,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:06:01,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747280669] [2023-11-21 22:06:01,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747280669] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:06:01,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:06:01,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:06:01,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013831249] [2023-11-21 22:06:01,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:06:01,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:06:01,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:06:01,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:06:01,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:06:01,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 68 [2023-11-21 22:06:01,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 210 flow. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states 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 22:06:01,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:06:01,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 68 [2023-11-21 22:06:01,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:06:01,298 INFO L124 PetriNetUnfolderBase]: 950/1831 cut-off events. [2023-11-21 22:06:01,299 INFO L125 PetriNetUnfolderBase]: For 487/488 co-relation queries the response was YES. [2023-11-21 22:06:01,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4113 conditions, 1831 events. 950/1831 cut-off events. For 487/488 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 10046 event pairs, 356 based on Foata normal form. 13/1712 useless extension candidates. Maximal degree in co-relation 3652. Up to 1286 conditions per place. [2023-11-21 22:06:01,318 INFO L140 encePairwiseOnDemand]: 65/68 looper letters, 53 selfloop transitions, 2 changer transitions 0/72 dead transitions. [2023-11-21 22:06:01,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 72 transitions, 336 flow [2023-11-21 22:06:01,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:06:01,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:06:01,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 137 transitions. [2023-11-21 22:06:01,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6715686274509803 [2023-11-21 22:06:01,320 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 137 transitions. [2023-11-21 22:06:01,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 137 transitions. [2023-11-21 22:06:01,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:06:01,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 137 transitions. [2023-11-21 22:06:01,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states 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 22:06:01,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states 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 22:06:01,322 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states 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 22:06:01,323 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 210 flow. Second operand 3 states and 137 transitions. [2023-11-21 22:06:01,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 72 transitions, 336 flow [2023-11-21 22:06:01,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 72 transitions, 328 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-21 22:06:01,329 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 189 flow [2023-11-21 22:06:01,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=189, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2023-11-21 22:06:01,330 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 1 predicate places. [2023-11-21 22:06:01,330 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 189 flow [2023-11-21 22:06:01,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 0 states have call successors, (0), 0 states 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 22:06:01,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:06:01,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:06:01,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-21 22:06:01,331 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:06:01,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:06:01,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1888962342, now seen corresponding path program 1 times [2023-11-21 22:06:01,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:06:01,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773154555] [2023-11-21 22:06:01,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:01,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:06:01,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:01,379 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 22:06:01,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:06:01,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773154555] [2023-11-21 22:06:01,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773154555] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:06:01,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:06:01,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:06:01,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008143639] [2023-11-21 22:06:01,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:06:01,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:06:01,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:06:01,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:06:01,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:06:01,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 68 [2023-11-21 22:06:01,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 189 flow. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states 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 22:06:01,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:06:01,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 68 [2023-11-21 22:06:01,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:06:01,700 INFO L124 PetriNetUnfolderBase]: 910/1803 cut-off events. [2023-11-21 22:06:01,700 INFO L125 PetriNetUnfolderBase]: For 470/470 co-relation queries the response was YES. [2023-11-21 22:06:01,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4016 conditions, 1803 events. 910/1803 cut-off events. For 470/470 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 10312 event pairs, 672 based on Foata normal form. 12/1671 useless extension candidates. Maximal degree in co-relation 2895. Up to 1188 conditions per place. [2023-11-21 22:06:01,718 INFO L140 encePairwiseOnDemand]: 65/68 looper letters, 56 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2023-11-21 22:06:01,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 77 transitions, 355 flow [2023-11-21 22:06:01,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:06:01,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:06:01,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 143 transitions. [2023-11-21 22:06:01,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7009803921568627 [2023-11-21 22:06:01,720 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 143 transitions. [2023-11-21 22:06:01,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 143 transitions. [2023-11-21 22:06:01,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:06:01,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 143 transitions. [2023-11-21 22:06:01,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states 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 22:06:01,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states 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 22:06:01,722 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states 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 22:06:01,723 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 189 flow. Second operand 3 states and 143 transitions. [2023-11-21 22:06:01,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 77 transitions, 355 flow [2023-11-21 22:06:01,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 77 transitions, 345 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-21 22:06:01,728 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 188 flow [2023-11-21 22:06:01,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2023-11-21 22:06:01,729 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 1 predicate places. [2023-11-21 22:06:01,730 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 188 flow [2023-11-21 22:06:01,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 0 states have call successors, (0), 0 states 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 22:06:01,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:06:01,730 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:06:01,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-21 22:06:01,731 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:06:01,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:06:01,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1128918634, now seen corresponding path program 1 times [2023-11-21 22:06:01,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:06:01,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357105980] [2023-11-21 22:06:01,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:01,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:06:01,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:02,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:06:02,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:06:02,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357105980] [2023-11-21 22:06:02,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357105980] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:06:02,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630086905] [2023-11-21 22:06:02,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:02,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:06:02,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd23273f-09a1-46b9-9188-3ade9e32ea2b/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:06:02,261 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd23273f-09a1-46b9-9188-3ade9e32ea2b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:06:02,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd23273f-09a1-46b9-9188-3ade9e32ea2b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 22:06:02,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:02,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-21 22:06:02,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:06:02,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:02,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:02,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 9 [2023-11-21 22:06:02,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:06:02,573 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 22:06:02,890 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:06:02,890 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:06:03,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:06:03,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630086905] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:06:03,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:06:03,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 15 [2023-11-21 22:06:03,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174181210] [2023-11-21 22:06:03,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:06:03,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-21 22:06:03,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:06:03,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-21 22:06:03,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-11-21 22:06:03,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 68 [2023-11-21 22:06:03,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 188 flow. Second operand has 17 states, 17 states have (on average 30.705882352941178) internal successors, (522), 17 states have internal predecessors, (522), 0 states have call successors, (0), 0 states 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 22:06:03,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:06:03,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 68 [2023-11-21 22:06:03,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:06:06,398 INFO L124 PetriNetUnfolderBase]: 4064/7746 cut-off events. [2023-11-21 22:06:06,398 INFO L125 PetriNetUnfolderBase]: For 2175/2175 co-relation queries the response was YES. [2023-11-21 22:06:06,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17663 conditions, 7746 events. 4064/7746 cut-off events. For 2175/2175 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 52109 event pairs, 193 based on Foata normal form. 192/7423 useless extension candidates. Maximal degree in co-relation 7095. Up to 1425 conditions per place. [2023-11-21 22:06:06,481 INFO L140 encePairwiseOnDemand]: 60/68 looper letters, 347 selfloop transitions, 45 changer transitions 0/410 dead transitions. [2023-11-21 22:06:06,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 410 transitions, 1947 flow [2023-11-21 22:06:06,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-21 22:06:06,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-21 22:06:06,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1032 transitions. [2023-11-21 22:06:06,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.659846547314578 [2023-11-21 22:06:06,488 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1032 transitions. [2023-11-21 22:06:06,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1032 transitions. [2023-11-21 22:06:06,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:06:06,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1032 transitions. [2023-11-21 22:06:06,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 44.869565217391305) internal successors, (1032), 23 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:06,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 68.0) internal successors, (1632), 24 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states 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 22:06:06,500 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 68.0) internal successors, (1632), 24 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states 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 22:06:06,501 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 188 flow. Second operand 23 states and 1032 transitions. [2023-11-21 22:06:06,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 410 transitions, 1947 flow [2023-11-21 22:06:06,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 410 transitions, 1930 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-21 22:06:06,518 INFO L231 Difference]: Finished difference. Result has 100 places, 103 transitions, 600 flow [2023-11-21 22:06:06,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=600, PETRI_PLACES=100, PETRI_TRANSITIONS=103} [2023-11-21 22:06:06,520 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 37 predicate places. [2023-11-21 22:06:06,520 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 103 transitions, 600 flow [2023-11-21 22:06:06,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 30.705882352941178) internal successors, (522), 17 states have internal predecessors, (522), 0 states have call successors, (0), 0 states 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 22:06:06,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:06:06,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:06:06,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd23273f-09a1-46b9-9188-3ade9e32ea2b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 22:06:06,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd23273f-09a1-46b9-9188-3ade9e32ea2b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:06:06,735 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:06:06,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:06:06,736 INFO L85 PathProgramCache]: Analyzing trace with hash 969819017, now seen corresponding path program 1 times [2023-11-21 22:06:06,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:06:06,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43317028] [2023-11-21 22:06:06,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:06,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:06:06,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:06,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:06:06,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:06:06,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43317028] [2023-11-21 22:06:06,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43317028] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:06:06,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:06:06,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:06:06,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999709234] [2023-11-21 22:06:06,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:06:06,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:06:06,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:06:06,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:06:06,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:06:06,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 68 [2023-11-21 22:06:06,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 103 transitions, 600 flow. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states 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 22:06:06,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:06:06,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 68 [2023-11-21 22:06:06,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:06:07,545 INFO L124 PetriNetUnfolderBase]: 1833/3912 cut-off events. [2023-11-21 22:06:07,545 INFO L125 PetriNetUnfolderBase]: For 2176/2176 co-relation queries the response was YES. [2023-11-21 22:06:07,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9437 conditions, 3912 events. 1833/3912 cut-off events. For 2176/2176 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 24019 event pairs, 372 based on Foata normal form. 234/3987 useless extension candidates. Maximal degree in co-relation 9235. Up to 2311 conditions per place. [2023-11-21 22:06:07,589 INFO L140 encePairwiseOnDemand]: 64/68 looper letters, 72 selfloop transitions, 4 changer transitions 0/95 dead transitions. [2023-11-21 22:06:07,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 95 transitions, 630 flow [2023-11-21 22:06:07,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:06:07,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:06:07,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 131 transitions. [2023-11-21 22:06:07,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6421568627450981 [2023-11-21 22:06:07,591 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 131 transitions. [2023-11-21 22:06:07,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 131 transitions. [2023-11-21 22:06:07,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:06:07,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 131 transitions. [2023-11-21 22:06:07,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states 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 22:06:07,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states 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 22:06:07,595 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states 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 22:06:07,595 INFO L175 Difference]: Start difference. First operand has 100 places, 103 transitions, 600 flow. Second operand 3 states and 131 transitions. [2023-11-21 22:06:07,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 95 transitions, 630 flow [2023-11-21 22:06:07,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 95 transitions, 576 flow, removed 23 selfloop flow, removed 9 redundant places. [2023-11-21 22:06:07,619 INFO L231 Difference]: Finished difference. Result has 88 places, 84 transitions, 400 flow [2023-11-21 22:06:07,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=400, PETRI_PLACES=88, PETRI_TRANSITIONS=84} [2023-11-21 22:06:07,621 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 25 predicate places. [2023-11-21 22:06:07,622 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 84 transitions, 400 flow [2023-11-21 22:06:07,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states 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 22:06:07,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:06:07,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:06:07,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-21 22:06:07,624 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:06:07,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:06:07,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1069950930, now seen corresponding path program 1 times [2023-11-21 22:06:07,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:06:07,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455066005] [2023-11-21 22:06:07,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:07,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:06:07,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:08,028 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 22:06:08,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:06:08,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455066005] [2023-11-21 22:06:08,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455066005] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:06:08,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:06:08,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 22:06:08,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585643260] [2023-11-21 22:06:08,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:06:08,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 22:06:08,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:06:08,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 22:06:08,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:06:08,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 68 [2023-11-21 22:06:08,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 84 transitions, 400 flow. Second operand has 8 states, 8 states have (on average 30.125) internal successors, (241), 8 states have internal predecessors, (241), 0 states have call successors, (0), 0 states 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 22:06:08,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:06:08,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 68 [2023-11-21 22:06:08,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:06:08,968 INFO L124 PetriNetUnfolderBase]: 1961/4118 cut-off events. [2023-11-21 22:06:08,968 INFO L125 PetriNetUnfolderBase]: For 1720/1720 co-relation queries the response was YES. [2023-11-21 22:06:08,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10019 conditions, 4118 events. 1961/4118 cut-off events. For 1720/1720 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 25297 event pairs, 461 based on Foata normal form. 0/3954 useless extension candidates. Maximal degree in co-relation 8986. Up to 2946 conditions per place. [2023-11-21 22:06:09,006 INFO L140 encePairwiseOnDemand]: 59/68 looper letters, 113 selfloop transitions, 9 changer transitions 0/140 dead transitions. [2023-11-21 22:06:09,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 140 transitions, 820 flow [2023-11-21 22:06:09,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 22:06:09,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-21 22:06:09,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 317 transitions. [2023-11-21 22:06:09,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5827205882352942 [2023-11-21 22:06:09,009 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 317 transitions. [2023-11-21 22:06:09,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 317 transitions. [2023-11-21 22:06:09,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:06:09,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 317 transitions. [2023-11-21 22:06:09,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 39.625) internal successors, (317), 8 states have internal predecessors, (317), 0 states have call successors, (0), 0 states 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 22:06:09,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 68.0) internal successors, (612), 9 states have internal predecessors, (612), 0 states have call successors, (0), 0 states 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 22:06:09,013 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 68.0) internal successors, (612), 9 states have internal predecessors, (612), 0 states have call successors, (0), 0 states 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 22:06:09,013 INFO L175 Difference]: Start difference. First operand has 88 places, 84 transitions, 400 flow. Second operand 8 states and 317 transitions. [2023-11-21 22:06:09,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 140 transitions, 820 flow [2023-11-21 22:06:09,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 140 transitions, 809 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-21 22:06:09,036 INFO L231 Difference]: Finished difference. Result has 97 places, 89 transitions, 455 flow [2023-11-21 22:06:09,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=455, PETRI_PLACES=97, PETRI_TRANSITIONS=89} [2023-11-21 22:06:09,037 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 34 predicate places. [2023-11-21 22:06:09,038 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 89 transitions, 455 flow [2023-11-21 22:06:09,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 30.125) internal successors, (241), 8 states have internal predecessors, (241), 0 states have call successors, (0), 0 states 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 22:06:09,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:06:09,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:06:09,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-21 22:06:09,039 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:06:09,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:06:09,039 INFO L85 PathProgramCache]: Analyzing trace with hash 925191071, now seen corresponding path program 1 times [2023-11-21 22:06:09,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:06:09,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116545634] [2023-11-21 22:06:09,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:09,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:06:09,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:09,144 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 22:06:09,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:06:09,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116545634] [2023-11-21 22:06:09,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116545634] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:06:09,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:06:09,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:06:09,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068707380] [2023-11-21 22:06:09,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:06:09,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:06:09,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:06:09,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:06:09,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:06:09,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 68 [2023-11-21 22:06:09,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 89 transitions, 455 flow. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 0 states have call successors, (0), 0 states 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 22:06:09,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:06:09,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 68 [2023-11-21 22:06:09,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:06:09,952 INFO L124 PetriNetUnfolderBase]: 1925/4051 cut-off events. [2023-11-21 22:06:09,952 INFO L125 PetriNetUnfolderBase]: For 1749/1749 co-relation queries the response was YES. [2023-11-21 22:06:09,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10106 conditions, 4051 events. 1925/4051 cut-off events. For 1749/1749 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 25228 event pairs, 1051 based on Foata normal form. 46/3961 useless extension candidates. Maximal degree in co-relation 9054. Up to 2255 conditions per place. [2023-11-21 22:06:10,002 INFO L140 encePairwiseOnDemand]: 61/68 looper letters, 59 selfloop transitions, 22 changer transitions 0/99 dead transitions. [2023-11-21 22:06:10,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 99 transitions, 645 flow [2023-11-21 22:06:10,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:06:10,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-21 22:06:10,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 183 transitions. [2023-11-21 22:06:10,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.538235294117647 [2023-11-21 22:06:10,005 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 183 transitions. [2023-11-21 22:06:10,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 183 transitions. [2023-11-21 22:06:10,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:06:10,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 183 transitions. [2023-11-21 22:06:10,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 36.6) internal successors, (183), 5 states have internal predecessors, (183), 0 states have call successors, (0), 0 states 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 22:06:10,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 68.0) internal successors, (408), 6 states have internal predecessors, (408), 0 states have call successors, (0), 0 states 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 22:06:10,009 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 68.0) internal successors, (408), 6 states have internal predecessors, (408), 0 states have call successors, (0), 0 states 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 22:06:10,009 INFO L175 Difference]: Start difference. First operand has 97 places, 89 transitions, 455 flow. Second operand 5 states and 183 transitions. [2023-11-21 22:06:10,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 99 transitions, 645 flow [2023-11-21 22:06:10,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 99 transitions, 636 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-21 22:06:10,034 INFO L231 Difference]: Finished difference. Result has 96 places, 88 transitions, 488 flow [2023-11-21 22:06:10,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=488, PETRI_PLACES=96, PETRI_TRANSITIONS=88} [2023-11-21 22:06:10,036 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 33 predicate places. [2023-11-21 22:06:10,036 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 88 transitions, 488 flow [2023-11-21 22:06:10,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 0 states have call successors, (0), 0 states 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 22:06:10,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:06:10,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:06:10,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-21 22:06:10,037 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:06:10,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:06:10,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1137520804, now seen corresponding path program 1 times [2023-11-21 22:06:10,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:06:10,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145540551] [2023-11-21 22:06:10,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:10,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:06:10,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:10,155 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 22:06:10,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:06:10,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145540551] [2023-11-21 22:06:10,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145540551] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:06:10,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:06:10,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:06:10,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40745058] [2023-11-21 22:06:10,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:06:10,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:06:10,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:06:10,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:06:10,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:06:10,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 68 [2023-11-21 22:06:10,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 88 transitions, 488 flow. Second operand has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states 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 22:06:10,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:06:10,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 68 [2023-11-21 22:06:10,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:06:10,930 INFO L124 PetriNetUnfolderBase]: 2280/4742 cut-off events. [2023-11-21 22:06:10,930 INFO L125 PetriNetUnfolderBase]: For 3502/3502 co-relation queries the response was YES. [2023-11-21 22:06:10,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12425 conditions, 4742 events. 2280/4742 cut-off events. For 3502/3502 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 30091 event pairs, 386 based on Foata normal form. 56/4674 useless extension candidates. Maximal degree in co-relation 10511. Up to 1920 conditions per place. [2023-11-21 22:06:10,982 INFO L140 encePairwiseOnDemand]: 62/68 looper letters, 110 selfloop transitions, 10 changer transitions 0/138 dead transitions. [2023-11-21 22:06:10,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 138 transitions, 985 flow [2023-11-21 22:06:10,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:06:10,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-21 22:06:10,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 214 transitions. [2023-11-21 22:06:10,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6294117647058823 [2023-11-21 22:06:10,985 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 214 transitions. [2023-11-21 22:06:10,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 214 transitions. [2023-11-21 22:06:10,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:06:10,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 214 transitions. [2023-11-21 22:06:10,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 42.8) internal successors, (214), 5 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:10,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 68.0) internal successors, (408), 6 states have internal predecessors, (408), 0 states have call successors, (0), 0 states 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 22:06:10,988 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 68.0) internal successors, (408), 6 states have internal predecessors, (408), 0 states have call successors, (0), 0 states 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 22:06:10,988 INFO L175 Difference]: Start difference. First operand has 96 places, 88 transitions, 488 flow. Second operand 5 states and 214 transitions. [2023-11-21 22:06:10,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 138 transitions, 985 flow [2023-11-21 22:06:11,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 138 transitions, 921 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-11-21 22:06:11,016 INFO L231 Difference]: Finished difference. Result has 99 places, 93 transitions, 520 flow [2023-11-21 22:06:11,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=520, PETRI_PLACES=99, PETRI_TRANSITIONS=93} [2023-11-21 22:06:11,017 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 36 predicate places. [2023-11-21 22:06:11,017 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 93 transitions, 520 flow [2023-11-21 22:06:11,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.6) internal successors, (163), 5 states have internal predecessors, (163), 0 states have call successors, (0), 0 states 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 22:06:11,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:06:11,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:06:11,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-21 22:06:11,018 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:06:11,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:06:11,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1977583883, now seen corresponding path program 1 times [2023-11-21 22:06:11,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:06:11,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893446073] [2023-11-21 22:06:11,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:11,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:06:11,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:11,800 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 22:06:11,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:06:11,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893446073] [2023-11-21 22:06:11,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893446073] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:06:11,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:06:11,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-21 22:06:11,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062689974] [2023-11-21 22:06:11,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:06:11,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-21 22:06:11,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:06:11,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-21 22:06:11,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-11-21 22:06:11,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 68 [2023-11-21 22:06:11,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 93 transitions, 520 flow. Second operand has 10 states, 10 states have (on average 29.1) internal successors, (291), 10 states have internal predecessors, (291), 0 states have call successors, (0), 0 states 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 22:06:11,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:06:11,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 68 [2023-11-21 22:06:11,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:06:13,592 INFO L124 PetriNetUnfolderBase]: 3916/8185 cut-off events. [2023-11-21 22:06:13,592 INFO L125 PetriNetUnfolderBase]: For 6741/6742 co-relation queries the response was YES. [2023-11-21 22:06:13,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21305 conditions, 8185 events. 3916/8185 cut-off events. For 6741/6742 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 56434 event pairs, 983 based on Foata normal form. 24/8022 useless extension candidates. Maximal degree in co-relation 17402. Up to 3969 conditions per place. [2023-11-21 22:06:13,679 INFO L140 encePairwiseOnDemand]: 55/68 looper letters, 195 selfloop transitions, 27 changer transitions 0/238 dead transitions. [2023-11-21 22:06:13,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 238 transitions, 1629 flow [2023-11-21 22:06:13,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-21 22:06:13,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-21 22:06:13,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 496 transitions. [2023-11-21 22:06:13,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5610859728506787 [2023-11-21 22:06:13,683 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 496 transitions. [2023-11-21 22:06:13,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 496 transitions. [2023-11-21 22:06:13,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:06:13,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 496 transitions. [2023-11-21 22:06:13,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 38.15384615384615) internal successors, (496), 13 states have internal predecessors, (496), 0 states have call successors, (0), 0 states 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 22:06:13,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 68.0) internal successors, (952), 14 states have internal predecessors, (952), 0 states have call successors, (0), 0 states 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 22:06:13,691 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 68.0) internal successors, (952), 14 states have internal predecessors, (952), 0 states have call successors, (0), 0 states 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 22:06:13,692 INFO L175 Difference]: Start difference. First operand has 99 places, 93 transitions, 520 flow. Second operand 13 states and 496 transitions. [2023-11-21 22:06:13,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 238 transitions, 1629 flow [2023-11-21 22:06:13,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 238 transitions, 1623 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-21 22:06:13,761 INFO L231 Difference]: Finished difference. Result has 116 places, 115 transitions, 787 flow [2023-11-21 22:06:13,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=516, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=787, PETRI_PLACES=116, PETRI_TRANSITIONS=115} [2023-11-21 22:06:13,762 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 53 predicate places. [2023-11-21 22:06:13,762 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 115 transitions, 787 flow [2023-11-21 22:06:13,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 29.1) internal successors, (291), 10 states have internal predecessors, (291), 0 states have call successors, (0), 0 states 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 22:06:13,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:06:13,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:06:13,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-21 22:06:13,764 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:06:13,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:06:13,764 INFO L85 PathProgramCache]: Analyzing trace with hash -952959139, now seen corresponding path program 2 times [2023-11-21 22:06:13,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:06:13,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488845798] [2023-11-21 22:06:13,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:13,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:06:13,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:14,753 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 22:06:14,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:06:14,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488845798] [2023-11-21 22:06:14,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488845798] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:06:14,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:06:14,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-21 22:06:14,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699691691] [2023-11-21 22:06:14,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:06:14,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-21 22:06:14,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:06:14,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-21 22:06:14,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-11-21 22:06:15,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 68 [2023-11-21 22:06:15,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 115 transitions, 787 flow. Second operand has 12 states, 12 states have (on average 28.75) internal successors, (345), 12 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 22:06:15,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:06:15,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 68 [2023-11-21 22:06:15,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:06:17,533 INFO L124 PetriNetUnfolderBase]: 5253/11012 cut-off events. [2023-11-21 22:06:17,534 INFO L125 PetriNetUnfolderBase]: For 11913/11913 co-relation queries the response was YES. [2023-11-21 22:06:17,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30032 conditions, 11012 events. 5253/11012 cut-off events. For 11913/11913 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 80899 event pairs, 1196 based on Foata normal form. 24/10810 useless extension candidates. Maximal degree in co-relation 24748. Up to 3653 conditions per place. [2023-11-21 22:06:17,625 INFO L140 encePairwiseOnDemand]: 57/68 looper letters, 184 selfloop transitions, 47 changer transitions 0/247 dead transitions. [2023-11-21 22:06:17,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 247 transitions, 1907 flow [2023-11-21 22:06:17,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-21 22:06:17,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-21 22:06:17,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 489 transitions. [2023-11-21 22:06:17,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531674208144797 [2023-11-21 22:06:17,629 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 489 transitions. [2023-11-21 22:06:17,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 489 transitions. [2023-11-21 22:06:17,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:06:17,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 489 transitions. [2023-11-21 22:06:17,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 37.61538461538461) internal successors, (489), 13 states have internal predecessors, (489), 0 states have call successors, (0), 0 states 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 22:06:17,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 68.0) internal successors, (952), 14 states have internal predecessors, (952), 0 states have call successors, (0), 0 states 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 22:06:17,634 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 68.0) internal successors, (952), 14 states have internal predecessors, (952), 0 states have call successors, (0), 0 states 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 22:06:17,635 INFO L175 Difference]: Start difference. First operand has 116 places, 115 transitions, 787 flow. Second operand 13 states and 489 transitions. [2023-11-21 22:06:17,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 247 transitions, 1907 flow [2023-11-21 22:06:17,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 247 transitions, 1893 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-11-21 22:06:17,750 INFO L231 Difference]: Finished difference. Result has 130 places, 134 transitions, 1114 flow [2023-11-21 22:06:17,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=773, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1114, PETRI_PLACES=130, PETRI_TRANSITIONS=134} [2023-11-21 22:06:17,751 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 67 predicate places. [2023-11-21 22:06:17,752 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 134 transitions, 1114 flow [2023-11-21 22:06:17,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 28.75) internal successors, (345), 12 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 22:06:17,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:06:17,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:06:17,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-21 22:06:17,753 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:06:17,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:06:17,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1866321886, now seen corresponding path program 1 times [2023-11-21 22:06:17,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:06:17,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409435315] [2023-11-21 22:06:17,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:17,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:06:17,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:17,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:06:17,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:06:17,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409435315] [2023-11-21 22:06:17,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409435315] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:06:17,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:06:17,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:06:17,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527582232] [2023-11-21 22:06:17,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:06:17,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:06:17,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:06:17,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:06:17,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:06:17,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 68 [2023-11-21 22:06:17,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 134 transitions, 1114 flow. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 22:06:17,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:06:17,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 68 [2023-11-21 22:06:17,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:06:20,511 INFO L124 PetriNetUnfolderBase]: 6658/13914 cut-off events. [2023-11-21 22:06:20,511 INFO L125 PetriNetUnfolderBase]: For 20859/20859 co-relation queries the response was YES. [2023-11-21 22:06:20,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40032 conditions, 13914 events. 6658/13914 cut-off events. For 20859/20859 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 108328 event pairs, 3949 based on Foata normal form. 156/13773 useless extension candidates. Maximal degree in co-relation 31706. Up to 9374 conditions per place. [2023-11-21 22:06:20,654 INFO L140 encePairwiseOnDemand]: 65/68 looper letters, 180 selfloop transitions, 2 changer transitions 0/201 dead transitions. [2023-11-21 22:06:20,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 201 transitions, 2050 flow [2023-11-21 22:06:20,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:06:20,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-21 22:06:20,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 143 transitions. [2023-11-21 22:06:20,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7009803921568627 [2023-11-21 22:06:20,657 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 143 transitions. [2023-11-21 22:06:20,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 143 transitions. [2023-11-21 22:06:20,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:06:20,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 143 transitions. [2023-11-21 22:06:20,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 0 states have call successors, (0), 0 states 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 22:06:20,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states 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 22:06:20,659 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states 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 22:06:20,659 INFO L175 Difference]: Start difference. First operand has 130 places, 134 transitions, 1114 flow. Second operand 3 states and 143 transitions. [2023-11-21 22:06:20,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 201 transitions, 2050 flow [2023-11-21 22:06:20,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 201 transitions, 1999 flow, removed 22 selfloop flow, removed 2 redundant places. [2023-11-21 22:06:20,844 INFO L231 Difference]: Finished difference. Result has 131 places, 135 transitions, 1090 flow [2023-11-21 22:06:20,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=1078, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1090, PETRI_PLACES=131, PETRI_TRANSITIONS=135} [2023-11-21 22:06:20,845 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 68 predicate places. [2023-11-21 22:06:20,845 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 135 transitions, 1090 flow [2023-11-21 22:06:20,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states 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 22:06:20,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:06:20,846 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:06:20,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-21 22:06:20,846 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:06:20,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:06:20,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1576852329, now seen corresponding path program 1 times [2023-11-21 22:06:20,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:06:20,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268150582] [2023-11-21 22:06:20,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:20,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:06:20,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:21,110 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:06:21,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:06:21,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268150582] [2023-11-21 22:06:21,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268150582] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:06:21,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118981613] [2023-11-21 22:06:21,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:21,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:06:21,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd23273f-09a1-46b9-9188-3ade9e32ea2b/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:06:21,113 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd23273f-09a1-46b9-9188-3ade9e32ea2b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:06:21,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd23273f-09a1-46b9-9188-3ade9e32ea2b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 22:06:21,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:21,263 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-21 22:06:21,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:06:21,317 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:06:21,318 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:06:21,375 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:06:21,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118981613] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:06:21,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:06:21,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-21 22:06:21,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375143663] [2023-11-21 22:06:21,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:06:21,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 22:06:21,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:06:21,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 22:06:21,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:06:21,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 68 [2023-11-21 22:06:21,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 135 transitions, 1090 flow. Second operand has 8 states, 8 states have (on average 35.375) internal successors, (283), 8 states have internal predecessors, (283), 0 states have call successors, (0), 0 states 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 22:06:21,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:06:21,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 68 [2023-11-21 22:06:21,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:06:24,790 INFO L124 PetriNetUnfolderBase]: 7653/16196 cut-off events. [2023-11-21 22:06:24,791 INFO L125 PetriNetUnfolderBase]: For 29179/29201 co-relation queries the response was YES. [2023-11-21 22:06:24,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48603 conditions, 16196 events. 7653/16196 cut-off events. For 29179/29201 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 121905 event pairs, 1608 based on Foata normal form. 222/16140 useless extension candidates. Maximal degree in co-relation 35991. Up to 2894 conditions per place. [2023-11-21 22:06:24,976 INFO L140 encePairwiseOnDemand]: 64/68 looper letters, 238 selfloop transitions, 46 changer transitions 0/303 dead transitions. [2023-11-21 22:06:24,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 303 transitions, 2593 flow [2023-11-21 22:06:24,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 22:06:24,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-21 22:06:24,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 409 transitions. [2023-11-21 22:06:24,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7518382352941176 [2023-11-21 22:06:24,979 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 409 transitions. [2023-11-21 22:06:24,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 409 transitions. [2023-11-21 22:06:24,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:06:24,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 409 transitions. [2023-11-21 22:06:24,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 51.125) internal successors, (409), 8 states have internal predecessors, (409), 0 states have call successors, (0), 0 states 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 22:06:24,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 68.0) internal successors, (612), 9 states have internal predecessors, (612), 0 states have call successors, (0), 0 states 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 22:06:24,984 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 68.0) internal successors, (612), 9 states have internal predecessors, (612), 0 states have call successors, (0), 0 states 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 22:06:24,984 INFO L175 Difference]: Start difference. First operand has 131 places, 135 transitions, 1090 flow. Second operand 8 states and 409 transitions. [2023-11-21 22:06:24,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 303 transitions, 2593 flow [2023-11-21 22:06:25,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 303 transitions, 2558 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-11-21 22:06:25,191 INFO L231 Difference]: Finished difference. Result has 141 places, 149 transitions, 1426 flow [2023-11-21 22:06:25,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=1040, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1426, PETRI_PLACES=141, PETRI_TRANSITIONS=149} [2023-11-21 22:06:25,192 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 78 predicate places. [2023-11-21 22:06:25,192 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 149 transitions, 1426 flow [2023-11-21 22:06:25,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 35.375) internal successors, (283), 8 states have internal predecessors, (283), 0 states have call successors, (0), 0 states 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 22:06:25,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:06:25,193 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:06:25,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd23273f-09a1-46b9-9188-3ade9e32ea2b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 22:06:25,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd23273f-09a1-46b9-9188-3ade9e32ea2b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:06:25,408 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:06:25,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:06:25,409 INFO L85 PathProgramCache]: Analyzing trace with hash -686680892, now seen corresponding path program 1 times [2023-11-21 22:06:25,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:06:25,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108638490] [2023-11-21 22:06:25,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:25,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:06:25,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:25,870 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:06:25,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:06:25,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108638490] [2023-11-21 22:06:25,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108638490] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:06:25,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038870489] [2023-11-21 22:06:25,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:25,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:06:25,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd23273f-09a1-46b9-9188-3ade9e32ea2b/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:06:25,872 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd23273f-09a1-46b9-9188-3ade9e32ea2b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:06:25,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd23273f-09a1-46b9-9188-3ade9e32ea2b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 22:06:26,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:26,020 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-21 22:06:26,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:06:26,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:06:26,519 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:06:26,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038870489] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:06:26,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:06:26,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 15 [2023-11-21 22:06:26,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963725878] [2023-11-21 22:06:26,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:06:26,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-21 22:06:26,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:06:26,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-21 22:06:26,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-11-21 22:06:26,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 68 [2023-11-21 22:06:26,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 149 transitions, 1426 flow. Second operand has 9 states, 9 states have (on average 30.77777777777778) internal successors, (277), 9 states have internal predecessors, (277), 0 states have call successors, (0), 0 states 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 22:06:26,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:06:26,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 68 [2023-11-21 22:06:26,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:06:31,316 INFO L124 PetriNetUnfolderBase]: 10621/22262 cut-off events. [2023-11-21 22:06:31,316 INFO L125 PetriNetUnfolderBase]: For 40193/40194 co-relation queries the response was YES. [2023-11-21 22:06:31,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68031 conditions, 22262 events. 10621/22262 cut-off events. For 40193/40194 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 172324 event pairs, 2587 based on Foata normal form. 84/21921 useless extension candidates. Maximal degree in co-relation 52896. Up to 6441 conditions per place. [2023-11-21 22:06:31,533 INFO L140 encePairwiseOnDemand]: 57/68 looper letters, 224 selfloop transitions, 82 changer transitions 0/324 dead transitions. [2023-11-21 22:06:31,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 324 transitions, 3267 flow [2023-11-21 22:06:31,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-21 22:06:31,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-21 22:06:31,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 455 transitions. [2023-11-21 22:06:31,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6082887700534759 [2023-11-21 22:06:31,536 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 455 transitions. [2023-11-21 22:06:31,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 455 transitions. [2023-11-21 22:06:31,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:06:31,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 455 transitions. [2023-11-21 22:06:31,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 41.36363636363637) internal successors, (455), 11 states have internal predecessors, (455), 0 states have call successors, (0), 0 states 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 22:06:31,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 68.0) internal successors, (816), 12 states have internal predecessors, (816), 0 states have call successors, (0), 0 states 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 22:06:31,542 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 68.0) internal successors, (816), 12 states have internal predecessors, (816), 0 states have call successors, (0), 0 states 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 22:06:31,542 INFO L175 Difference]: Start difference. First operand has 141 places, 149 transitions, 1426 flow. Second operand 11 states and 455 transitions. [2023-11-21 22:06:31,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 324 transitions, 3267 flow [2023-11-21 22:06:31,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 324 transitions, 3203 flow, removed 30 selfloop flow, removed 2 redundant places. [2023-11-21 22:06:31,914 INFO L231 Difference]: Finished difference. Result has 157 places, 197 transitions, 2319 flow [2023-11-21 22:06:31,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=1402, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2319, PETRI_PLACES=157, PETRI_TRANSITIONS=197} [2023-11-21 22:06:31,915 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 94 predicate places. [2023-11-21 22:06:31,916 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 197 transitions, 2319 flow [2023-11-21 22:06:31,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 30.77777777777778) internal successors, (277), 9 states have internal predecessors, (277), 0 states have call successors, (0), 0 states 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 22:06:31,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:06:31,917 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:06:31,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd23273f-09a1-46b9-9188-3ade9e32ea2b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 22:06:32,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd23273f-09a1-46b9-9188-3ade9e32ea2b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:06:32,138 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:06:32,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:06:32,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1605981153, now seen corresponding path program 1 times [2023-11-21 22:06:32,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:06:32,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546625800] [2023-11-21 22:06:32,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:32,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:06:32,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:32,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:06:32,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:06:32,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546625800] [2023-11-21 22:06:32,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546625800] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:06:32,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251416773] [2023-11-21 22:06:32,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:32,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:06:32,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd23273f-09a1-46b9-9188-3ade9e32ea2b/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:06:32,327 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd23273f-09a1-46b9-9188-3ade9e32ea2b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:06:32,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd23273f-09a1-46b9-9188-3ade9e32ea2b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 22:06:32,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:06:32,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-21 22:06:32,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:06:32,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:06:32,531 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:06:32,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:06:32,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251416773] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:06:32,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:06:32,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2023-11-21 22:06:32,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674252345] [2023-11-21 22:06:32,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:06:32,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 22:06:32,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:06:32,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 22:06:32,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:06:32,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 68 [2023-11-21 22:06:32,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 197 transitions, 2319 flow. Second operand has 6 states, 6 states have (on average 33.333333333333336) internal successors, (200), 6 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:32,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-21 22:06:32,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 68 [2023-11-21 22:06:32,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-21 22:06:37,000 INFO L124 PetriNetUnfolderBase]: 7955/16856 cut-off events. [2023-11-21 22:06:37,000 INFO L125 PetriNetUnfolderBase]: For 40881/40882 co-relation queries the response was YES. [2023-11-21 22:06:37,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55220 conditions, 16856 events. 7955/16856 cut-off events. For 40881/40882 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 123620 event pairs, 2617 based on Foata normal form. 21/16538 useless extension candidates. Maximal degree in co-relation 47100. Up to 11307 conditions per place. [2023-11-21 22:06:37,196 INFO L140 encePairwiseOnDemand]: 62/68 looper letters, 184 selfloop transitions, 22 changer transitions 0/225 dead transitions. [2023-11-21 22:06:37,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 225 transitions, 2603 flow [2023-11-21 22:06:37,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 22:06:37,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-21 22:06:37,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 264 transitions. [2023-11-21 22:06:37,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6470588235294118 [2023-11-21 22:06:37,198 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 264 transitions. [2023-11-21 22:06:37,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 264 transitions. [2023-11-21 22:06:37,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-21 22:06:37,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 264 transitions. [2023-11-21 22:06:37,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 44.0) internal successors, (264), 6 states have internal predecessors, (264), 0 states have call successors, (0), 0 states 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 22:06:37,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 68.0) internal successors, (476), 7 states have internal predecessors, (476), 0 states have call successors, (0), 0 states 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 22:06:37,202 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 68.0) internal successors, (476), 7 states have internal predecessors, (476), 0 states have call successors, (0), 0 states 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 22:06:37,202 INFO L175 Difference]: Start difference. First operand has 157 places, 197 transitions, 2319 flow. Second operand 6 states and 264 transitions. [2023-11-21 22:06:37,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 225 transitions, 2603 flow [2023-11-21 22:06:37,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 225 transitions, 2503 flow, removed 41 selfloop flow, removed 3 redundant places. [2023-11-21 22:06:37,443 INFO L231 Difference]: Finished difference. Result has 162 places, 173 transitions, 1969 flow [2023-11-21 22:06:37,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=68, PETRI_DIFFERENCE_MINUEND_FLOW=1869, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1969, PETRI_PLACES=162, PETRI_TRANSITIONS=173} [2023-11-21 22:06:37,444 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 99 predicate places. [2023-11-21 22:06:37,444 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 173 transitions, 1969 flow [2023-11-21 22:06:37,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 33.333333333333336) internal successors, (200), 6 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:06:37,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-21 22:06:37,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:06:37,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd23273f-09a1-46b9-9188-3ade9e32ea2b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 22:06:37,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd23273f-09a1-46b9-9188-3ade9e32ea2b/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:06:37,651 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-11-21 22:06:37,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:06:37,652 INFO L85 PathProgramCache]: Analyzing trace with hash 2090605596, now seen corresponding path program 1 times [2023-11-21 22:06:37,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:06:37,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476337884] [2023-11-21 22:06:37,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:06:37,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:06:37,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat